Document:

EX-10.1

 Exhibit 10.1 

SECURITIES PURCHASE AGREEMENT 

SECURITIES PURCHASE AGREEMENT (the “Agreement”), dated as of February 23, 2015, by and among Real Goods Solar,
Inc., a Colorado corporation, with headquarters located at 833 West South Boulder Road, Louisville, CO 80027 (the “Company”), and the investors listed on the Schedule of Buyers attached hereto (individually, a
“Buyer” and collectively, the “Buyers”). 
 RECITALS 

A. The Company and the Buyers desire to enter into this transaction to purchase the Common Shares (as defined below) and the
Warrants (as defined below) pursuant to the Registration Statement (as defined below) which is currently effective, has at least $200,000,000 of initial offering price of unallocated securities available for sale as of the date hereof and has been
declared effective in accordance with the Securities Act of 1933, as amended (the “1933 Act”), by the United States Securities and Exchange Commission (the “SEC”). 

B. The Series A Warrant Shares, Series B Warrant Shares and Series C Warrant Shares (each, as defined below) shall, in each
case, be issued pursuant to the Registration Statement or another registration statement, or, if the Registration Statement or such other registration statement is not available at the time of issuance of such Warrant Shares and, in the case of the
Series B Warrants, if the Registration Statement or such other registration statement remains unavailable for a period of sixty (60) consecutive days, shall be issued solely pursuant to the cashless exercise provisions of the applicable Warrant
as securities exempt from registration pursuant to Section 3(a)(9) of the 1933 Act. The Series D Warrant Shares and the Series E Warrant Shares (each, as defined below) shall, in each case, be issued pursuant to the Registration Statement,
another registration statement or pursuant to the cashless provisions of the applicable Warrant as securities exempt from registration pursuant to Section 3(a)(9) of the 1933 Act. 

C. Each Buyer wishes to purchase, and the Company wishes to sell, upon the terms and conditions stated in this Agreement, at
the Closing (as defined below) (i) that aggregate number of shares of the Company’s Class A common stock, par value $0.0001 per share (the “Common Stock”) set forth opposite such Buyer’s name in column
(3) of the Schedule of Buyers attached hereto (which aggregate amount for all Buyers shall be [            ]) (the “Common Shares”), (ii) Series A warrants, in
substantially the form attached hereto as Exhibit A (the “Series A Warrants”), to acquire up to that number of additional shares of Common Stock set forth opposite such Buyer’s name in column (4)(a) of the Schedule
of Buyers (as exercised, collectively, the “Series A Warrant Shares”), (iii) Series B warrants, in substantially the form attached hereto as Exhibit A (the “Series B Warrants”) to acquire up to that
number of additional shares of Common Stock set forth therein (as exercised, collectively, the “Series B Warrant Shares”), (iv) Series C warrants, in substantially the form attached hereto as Exhibit A (the
“Series C Warrants”) to acquire up to that number of 

 
additional shares of Common Stock set forth therein (as exercised, collectively, the “Series C Warrant Shares”), (v) Series D warrants, in substantially the form attached
hereto as Exhibit A (the “Series D Warrants”) to acquire up to that number of additional shares of Common Stock set forth therein (as exercised, collectively, the “Series D Warrant Shares”) and
(vi) Series E warrants, in substantially the form attached hereto as Exhibit A (the “Series E Warrants” and together with the Series A Warrants, Series B Warrants, Series C Warrants and Series D Warrants, the
“Warrants”) to acquire up to that number of additional shares of Common Stock, as set forth opposite such Buyer’s name in column (4)(b) of the Schedule of Buyers (as exercised, collectively, the “Series E Warrant
Shares” and, together with the Series A Warrant Shares, the Series B Warrant Shares, the Series C Warrant Shares and the Series D Warrant Shares, the “Warrant Shares”). 

D. The Common Shares, the Warrants and the Warrant Shares collectively are referred to herein as the
“Securities”. 
 NOW, THEREFORE, the Company and each Buyer hereby agree as follows: 

1. PURCHASE AND SALE OF COMMON SHARES AND WARRANTS. 

(a) Incorporation of Recitals. The “recitals” set forth above shall be incorporated into, and deemed a part of
this Agreement. 
 (b) Closing. Subject to the satisfaction (or waiver) of the conditions set forth in Sections 6 and
7 below, the Company shall issue and sell to each Buyer, and each Buyer severally, but not jointly, agrees to purchase from the Company on the Closing Date (as defined below), (i) the number of Common Shares in an aggregate amount as is set
forth opposite such Buyer’s name in column (3) of the Schedule of Buyers, (ii) Series A Warrants to acquire up to that number of Series A Warrant Shares as is set forth opposite such Buyer’s name in column (4)(a) of the
Schedule of Buyers, (iii) Series B Warrants to acquire up to that number of additional shares of Common Stock set forth therein, (iv) Series C Warrants to acquire up to that number of additional shares of Common Stock set forth therein,
(v) Series D Warrants to acquire up to that number of additional shares of Common Stock set forth therein and (vi) Series E Warrants to acquire up to that number of additional shares of Common Stock, as set forth opposite such Buyer’s
name in column (4)(b) of the Schedule of Buyers (the “Closing”). Notwithstanding anything herein to the contrary, the Buyers acknowledge and agree that certain retail investors (the “Retail Investors” and,
together with the Buyers, the “Purchasers”) will be participating in the transactions contemplated hereunder on the same terms and conditions as set forth hereunder but such participation may be obtained verbally through sub-agents
retained by the Agent (as defined in Section 3(kk)) rather through the execution of this Agreement and settlement of such accounts may occur directly with the participating brokers. The Company hereby acknowledges and agrees that the Closing
contemplated by this Agreement shall occur upon the satisfaction of the closing conditions set forth in Section 6 and 7, regardless of whether or not the Retail Investors participate in such transactions. 

(c) Purchase Price. The aggregate purchase price for the Common Shares and the Warrants to be purchased by each such
Buyer at the Closing (the “Purchase Price”) shall be the amount set forth opposite each Buyer’s name in column (5) of the Schedule of Buyers (less, in the case of
                    (the “Lead Investor”), any amounts withheld pursuant to Section 4(f)), which shall be equal to $0.50 (as
adjusted for any stock dividend, stock split, stock combination, reclassification or similar transaction occurring after the date hereof) per Common Share and related Warrants to be purchased by each Buyer at the Closing. 

  
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 (d) Closing Date. The date and time of the Closing (the “Closing
Date”) shall be 10:00 a.m., New York City time, on the date hereof (or such later date as is mutually agreed to by the Company and each Buyer, but in no event later than February 26, 2015) after notification of satisfaction (or waiver)
of the conditions to the Closing set forth in Sections 6 and 7 below at the offices of Schulte Roth & Zabel LLP, 919 Third Avenue, New York, New York 10022, subject to notification of satisfaction (or waiver) of the conditions to
the Closing set forth in Sections 6 and 7 below. 
 (e) Form of Payment. On the Closing Date each Buyer shall pay
its Purchase Price to the Company (less, in the case of the Lead Investor, any amounts withheld pursuant to Section 4(f)) by wire transfer of immediately available funds to an escrow account established by the Company and the Agent with
Signature Bank (or such other bank mutually agreed to by the Company and the Agent), as escrow agent, in accordance with the Company’s written wire instructions (the “Escrow Account”), which funds shall be subject to the terms
and conditions of such escrow and (ii) the Company shall deliver to each Buyer (u) the Common Shares (allocated in the amounts as such Buyer shall request) which such Buyer is then purchasing hereunder, (v) the Series A Warrants
(allocated in the amounts as such Buyer shall request) such Buyer is purchasing, (w) the Series B Warrants (allocated in the amounts as such Buyer shall request) such Buyer is purchasing, (x) the Series C Warrants (allocated in the amounts
as such Buyer shall request) such Buyer is purchasing, (y) the Series D Warrants (allocated in the amounts as such Buyer shall request) such Buyer is purchasing and (z) the Series E Warrants (allocated in the amounts as such Buyer shall
request) such Buyer is purchasing, in each case duly executed on behalf of the Company and registered in the name of such Buyer or its designee. 

(f) Escrow. Notwithstanding anything herein to the contrary or in the agreement governing the Escrow Account, if the
Closing does not occur on or prior to February 26, 2015, the Company shall, at the written request of a Buyer, promptly cause such Buyer’s Purchase Price to be returned to such Buyer pursuant to wire instructions provided in writing by such
Buyer to the Company. 
 2. BUYER’S REPRESENTATIONS AND WARRANTIES. Each Buyer, severally and not jointly, represents and
warrants with respect to only itself that: 
 (a) Organization; Authority. Such Buyer is an entity duly organized,
validly existing and in good standing under the laws of the jurisdiction of its organization with the requisite power and authority to enter into and to consummate the transactions contemplated by this Agreement and otherwise to carry out its
obligations hereunder and thereunder. The execution, delivery and performance by such Buyer of the transactions contemplated by this Agreement has been duly authorized by all necessary action on the part of such Buyer. This Agreement has been duly
executed by such Buyer, and when delivered by such Buyer in accordance with the terms hereof, will constitute the valid and legally binding obligation of such Buyer, enforceable against it in accordance with its terms, except as such enforceability
may be limited by general principles of equity or applicable bankruptcy, insolvency, reorganization, moratorium, liquidation or similar laws relating to, or affecting generally, the enforcement of applicable creditors’ rights and remedies. 

(b) No Conflicts. The execution, delivery and performance by such Buyer of this Agreement and the consummation by such
Buyer of the transactions contemplated hereby will not (i) result in a violation of the organizational documents of such Buyer or (ii) conflict 

  
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with, or constitute a default (or an event which with notice or lapse of time or both would become a default) under, or give to others any rights of termination, amendment, acceleration or
cancellation of, any agreement, indenture or instrument to which such Buyer is a party, or (iii) result in a violation of any law, rule, regulation, order, judgment or decree (including federal and state securities laws) applicable to such
Buyer, except in the case of clauses (ii) and (iii) above, for such conflicts, defaults, rights or violations which would not, individually or in the aggregate, reasonably be expected to have a material adverse effect on the ability of
such Buyer to perform its obligations hereunder. 
 (c) No Agent Information. Such Buyer acknowledges and agrees that
neither the Agent nor any Affiliate of the Agent has provided such Buyer with any information or advice with respect to the Securities nor is such information or advice necessary or desired. In connection with the issuance of the Securities to such
Buyer, neither the Agent nor any of its Affiliates has acted as a financial advisor or fiduciary to such Buyer. 
 (d)
Buyer Status. The Buyer is an “accredited investor,” as defined in Rule 501(a) promulgated under the 1933 Act, and is a “qualified purchaser” under Section 18 of the 1933 Act. 

3. REPRESENTATIONS AND WARRANTIES OF THE COMPANY. The Company represents and warrants to each of the Buyers that, as of the date hereof
and as of the Closing Date: 
 (a) Shelf Registration Statement. 

(i) The Company has prepared and filed in conformity with the requirements of the 1933 Act and the published rules and regulations
thereunder (the “Rules and Regulations”) adopted by the SEC a “shelf” registration statement on Form S-3 (No. 333-193718), which became effective on February 10, 2014, including a base prospectus, (the
“Base Prospectus”) relating to Common Stock, preferred stock, warrants, rights, debt securities or units of the Company that may be sold from time to time by the Company, in accordance with Rule 415 of the 1933 Act, and such
amendments thereof as may have been required to the date of this Agreement. The term “Registration Statement” as used in this Agreement means such registration statement, including all exhibits, financial schedules and all documents
and information deemed to be part of the Registration Statement by incorporation by reference or otherwise, as amended from time to time, including the information (if any) contained in the form of final prospectus filed with the SEC pursuant to
Rule 424(b) of the Rules and Regulations and deemed to be part thereof at the time of effectiveness pursuant to Rules 430A and 430B of the Rules and Regulations. The term “Preliminary Prospectus” means the Base Prospectus, together
with any preliminary prospectus supplement used or filed with the SEC pursuant to Rule 424 of the Rules and Regulations. The term “Prospectus” means the Base Prospectus, any Preliminary Prospectus and any amendments or further
supplements to such prospectus filed with the SEC, and including, without limitation, the final prospectus supplement (the “Prospectus Supplement”), filed pursuant to and within the limits described in Rule 424(b) with the SEC in
connection with the proposed sale of the Securities contemplated by this Agreement through the date of such prospectus supplement. Unless otherwise stated herein, any reference herein to the Registration Statement, any Preliminary Prospectus, the
Statutory Prospectus (as  

  
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hereinafter defined) and the Prospectus shall be deemed to refer to and include the documents incorporated by reference therein, including pursuant to Item 12 of Form S-3 under the 1933
Act, which were filed under the Securities Exchange Act of 1934, as amended (the “1934 Act”), on or before the date hereof or are so filed hereafter. Any reference herein to the terms “amend,” “amendment” or
“supplement” with respect to the Registration Statement, any Preliminary Prospectus, the Statutory Prospectus or the Prospectus shall be deemed to refer to and include any such document filed or to be filed under the 1934 Act after the
date of the Registration Statement, any such Preliminary Prospectus, Statutory Prospectus or Prospectus, as the case may be, and deemed to be incorporated therein by reference. 

(ii) The Company was at the time of the filing of the Registration Statement eligible to use Form S-3. As of the date of this Agreement, the
Company is eligible to use Form S-3 under the 1933 Act and it meets the transaction requirements with respect to the aggregate market value of securities being sold pursuant to this offering and during the twelve (12) months prior to this
offering, in accordance with General Instruction I.B.1 of Form S-3. The Company filed with the SEC the Registration Statement on such Form S-3, including a Base Prospectus, for registration under the 1933 Act of the offering and sale of the
Securities, and the Company has prepared and used a Preliminary Prospectus in connection with the offer and sale of the Securities. When the Registration Statement or any amendment thereof or supplement thereto was or is declared effective and as of
the date of the most recent amendment to the Registration Statement, it (i) complied or will comply, in all material respects, with the requirements of the 1933 Act and the Rules and Regulations and the 1934 Act and the rules and regulations of
the SEC thereunder and (ii) did not or will not, contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary in order to make the statements therein not misleading. When any
Preliminary Prospectus or Prospectus was first filed with the SEC (whether filed as part of the Registration Statement or any amendment thereto or pursuant to Rule 424 of the Rules) and when any amendment thereof or supplement thereto was first
filed with the SEC, such Preliminary Prospectus or Prospectus as amended or supplemented complied in all material respects with the applicable provisions of the 1933 Act and the Rules and Regulations and did not or will not, contain any untrue
statement of a material fact or omit to state any material fact required to be stated therein or necessary in order to make the statements therein not misleading. Notwithstanding the forgoing, the Company makes no representations or warranties as to
information contained in or omitted from any Preliminary Prospectus or Prospectus, in reliance upon, and in conformity with, written information furnished to the Company by or on behalf of the Buyers, specifically for use therein. 

(b) Prospectus. As of the Applicable Time (as defined below) and as of the Closing Date, neither (x) the General
Use Free Writing Prospectus(es) (as defined below) issued at or prior to the Applicable Time, the Statutory Prospectus (as defined below), all considered together (collectively, the “General Disclosure Package”), nor (y) any
individual Limited Use Free Writing Prospectus (as defined below), when considered together with the General Disclosure Package, included, includes or will include any untrue statement of a material fact or omitted, omits or will omit to state a
material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that the Company makes no representations or warranties as to information
contained in or omitted from any Issuer Free Writing Prospectus, in reliance upon, and in conformity with, written information furnished to the Company by or on behalf of the Buyers, specifically for use therein. As used in this subsection and
elsewhere in this Agreement: 

  
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 (i) “Applicable Time” means 5:30 p.m. (New York time) on the date of
this Agreement or such other time as agreed to by the Company and the Buyers. 
 (ii) “Statutory Prospectus”
as of any time means the Preliminary Prospectus included in the Registration Statement immediately prior to that time. 

(iii) “Issuer Free Writing Prospectus” means any “issuer free writing prospectus,” as defined in Rule 433
under the 1933 Act, relating to the Securities in the form filed or required to be filed with the SEC or, if not required to be filed, in the form retained in the Company’s records pursuant to Rule 433(g) under the 1933 Act. 

(iv) “General Use Free Writing Prospectus” means any Issuer Free Writing Prospectus that is identified on Schedule I
to this Agreement.  
 (v) “Limited Use Free Writing Prospectus” means any Issuer Free Writing Prospectus
that is not a General Use Free Writing Prospectus. 
 (c) Organization. Each of the Company and its
“Subsidiaries” (which, for the purposes of this Agreement means any entity or joint venture which the Company, directly or indirectly, owns any of the capital stock or holds an equity or similar interest) are entities duly organized
and validly existing in good standing under the laws of the jurisdiction in which they are formed, and have requisite power and authorization to own or lease their properties and conduct their business as now being conducted and as described in the
Registration Statement, the General Disclosure Package and the Prospectus. The Company’s significant Subsidiaries (as such term is defined in Rule 1-02 of Regulation S-X promulgated by the SEC) include (i) those listed in Exhibit 21.1 to
the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013 (the “Annual Report”), other than Real Goods Trading Corporation, Inc. and Real Goods Syndicated, Inc., which have liquidated their
assets since December 31, 2013, and (ii) Elemental Energy, LLC, RGS Financing, Inc., Mercury Energy, Inc., Real Goods Solar, Inc. – Mercury Energy, Inc., which were acquired or formed after December 31, 2013. The Subsidiaries are
the only subsidiaries, direct or indirect, of the Company. The Subsidiaries set forth on Schedule 3(c) under the heading “Significant Subsidiaries” are referred to herein as the “Significant Subsidiaries.” The
Subsidiaries which are not Significant Subsidiaries are not significant subsidiaries as defined in Rule 1-02 of Regulation S-X. The Company and each of the Subsidiaries are duly qualified as a foreign entity to do business and is in good standing in
every jurisdiction in which its ownership of property or the nature of the conduct of their business makes such qualification necessary, except to the extent that the failure to be so qualified or be in good standing would not reasonably be expected
to have a Material Adverse Effect. As used in this Agreement, “Material Adverse Effect” means any material adverse effect on (i) the business, properties, assets, operations, results of operations, condition (financial or
otherwise) or prospects of the Company and its Subsidiaries, individually or taken as a whole, (ii) the transactions contemplated hereby or in the other Transaction Documents, or (iii) the authority or the ability of the Company to perform
its obligations under this Agreement or the other Transaction Documents or to consummate any transactions contemplated by this 

  
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Agreement or the other Transaction Documents. The outstanding shares of capital stock of each of the Subsidiaries have been duly authorized and validly issued, are fully paid and non-assessable
and are owned by the Company or another Subsidiary free and clear of all liens, encumbrances and equities and claims, except as described in the Registration Statement and the Annual Report; and, except as set forth in the Registration Statement and
the Prospectus, no options, warrants or other rights to purchase, agreements or other obligations to issue or other rights to convert any obligations into shares of capital stock or ownership interests in the Subsidiaries are outstanding. 

(d) Authorization; Enforcement; Validity. The Company has the requisite corporate power and authority to enter into and
perform its obligations under this Agreement, the Irrevocable Transfer Agent Instructions (as defined in Section 5(b)), the Warrants, the Lock-Up Agreements (as defined in Section 3(xx)), the Voting Agreement (as defined in
Section 4(n)) and each of the other agreements entered into by the parties hereto in connection with the transactions contemplated by this Agreement (collectively, the “Transaction Documents”) and to issue the Securities,
except with respect to the issuance of such number of Warrant Shares exceeding the number of authorized shares, subject to obtaining the Shareholder Approval and effecting the Reverse Stock Split and the Authorized Shares Increase Amendment (each,
as defined in Section 4(p)), in accordance with the terms hereof and thereof. The execution and delivery of the Transaction Documents by the Company and, except with respect to the issuance of such number of Warrant Shares exceeding the number
of authorized shares, subject to receiving the Shareholder Approval and effecting the Reverse Stock Split and the Authorized Shares Increase Amendment, the consummation by the Company of the transactions contemplated hereby and thereby, including,
without limitation, the issuance of the Warrants, the reservation for issuance and the issuance of the Common Shares and the reservation for issuance and the issuance of the Warrant Shares issuable upon exercise of the Warrants have been duly
authorized by the Company’s Board of Directors, and, no further filing, consent, or authorization is required by the Company, its Board of Directors or its shareholders. This Agreement and the other Transaction Documents have been duly executed
and delivered by the Company, and constitute the legal, valid and binding obligations of the Company, enforceable against the Company in accordance with their respective terms, except as such enforceability may be limited by general principles of
equity or applicable bankruptcy, insolvency, reorganization, moratorium, liquidation or similar laws relating to, or affecting generally, the enforcement of applicable creditors’ rights and remedies. 

(e) Issuance of Securities. The outstanding shares of Common Stock of the Company have been duly authorized and validly
issued and are fully paid and non-assessable; the Securities to be issued and sold by the Company, except with respect to the issuance of such number of Warrant Shares exceeding the number of authorized shares, subject to receiving the Shareholder
Approval and effecting the Reverse Stock Split and the Authorized Shares Increase Amendment, have been duly authorized and when issued and paid for as contemplated herein in accordance with the terms of the Transaction Documents will be free from
all taxes, liens and charges with respect to the issue thereof, validly issued, fully paid and non-assessable; and no preemptive rights of shareholders exist with respect to any of the Securities or the issue and sale thereof. As of the Closing, a
number of shares of Common Stock shall have initially been duly 

  
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authorized and reserved for issuance which equals 85,002,328 shares of Common Stock (as adjusted for any stock dividend, stock split, stock combination, reclassification or similar transaction
occurring after the date hereof) to effect the sale of the Common Shares hereunder and the exercise of all of the Warrants then outstanding (such number of shares, the “Initial Required Reserve Amount”). As of February 23,
2015, there are 97,657,027 shares of Common Stock authorized and unissued. Neither the offering nor sale of the Securities as contemplated by this Agreement gives rise to any rights, other than those which have been waived or satisfied, for or
relating to the registration of any shares of Common Stock. Upon exercise of the Warrants in accordance with the terms thereof the “Warrant Shares” will be validly issued, fully paid and nonassessable and free from all preemptive or
similar rights, taxes, liens and charges with respect to the issue thereof, with the holders being entitled to all rights accorded to a holder of Common Stock. Except as set forth in the Registration Statement and the Prospectus, there are no
securities or instruments issued by the Company containing anti-dilution or similar provisions that will be triggered by the issuance of the Securities. 

(f) Equity Capitalization. The Company has or will have, as the case may be, an authorized, issued and outstanding
capitalization as is set forth in the Registration Statement and the Prospectus (subject, in each case, to the issuance of shares of Common Stock upon exercise of stock options and warrants disclosed as outstanding in the Registration Statement and
the Prospectus and the grant or issuance of options or shares under existing equity compensation plans or stock purchase plans described in the Registration Statement or the Prospectus), and such authorized capital stock conforms to the description
thereof set forth in the Registration Statement and the Prospectus. Except as disclosed on Schedule 3(f) hereto, in the Registration Statement or the Prospectus (i) none of the Company’s capital stock is subject to preemptive rights
or any other similar rights or any liens or encumbrances suffered or permitted by the Company; (ii) there are no outstanding options, warrants, scrip, rights to subscribe to, calls or commitments of any character whatsoever relating to, or
securities or rights convertible into, or exercisable or exchangeable for, any shares of capital stock of the Company or any of its Subsidiaries, or contracts, commitments, understandings or arrangements by which the Company or any of its
Subsidiaries is or may become bound to issue additional shares of capital stock of the Company or any of its Subsidiaries or options, warrants, scrip, rights to subscribe to, calls or commitments of any character whatsoever relating to, or
securities or rights convertible into, or exercisable or exchangeable for, any shares of capital stock of the Company or any of its Subsidiaries; (iii) there are no material outstanding debt securities, notes, credit agreements, credit
facilities or other agreements, documents or instruments evidencing Indebtedness (as defined below) of the Company or any of its Subsidiaries or by which the Company or any of its Subsidiaries is or may become bound; (iv) there are no financing
statements securing obligations in any material amounts, either singly or in the aggregate, filed in connection with the Company or any of its Subsidiaries; (v) there are no agreements or arrangements under which the Company or any of its
Subsidiaries is obligated to register the sale of any of their securities under the 1933 Act; (vi) there are no outstanding securities or instruments of the Company or any of its Subsidiaries which contain any redemption or similar provisions,
and there are no contracts, commitments, understandings or arrangements by which 

  
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the Company or any of its Subsidiaries is or may become bound to redeem a security of the Company or any of its Subsidiaries; (vii) there are no securities or instruments containing
anti-dilution or similar provisions that will be triggered by the issuance of the Securities; (viii) the Company does not have any stock appreciation rights or “phantom stock” plans or agreements or any similar plan or agreement; and
(ix) the Company and its Subsidiaries have no liabilities or obligations required to be disclosed in the SEC Documents but not so disclosed in the SEC Documents, other than those incurred in the ordinary course of the Company’s or any of
its Subsidiary’s’ respective businesses and which, individually or in the aggregate, do not or would not have a Material Adverse Effect. The Company has furnished or made available to the Buyers true, correct and complete copies of the
Company’s Articles of Incorporation, as amended and as in effect on the date hereof (the “Articles of Incorporation”), and the Company’s Bylaws, as amended and as in effect on the date hereof (the
“Bylaws”), and the terms of all securities convertible into, or exercisable or exchangeable for shares of Common Stock and the material rights of the holders thereof in respect thereto. All of the Securities conform to the
description thereof contained in the Registration Statement and the Prospectus. The form of certificates for the Common Shares and the Warrant Shares, as applicable, will conform to the corporate law of the jurisdiction of the Company’s
incorporation. 
 (g) Disclosure. 

(i) The SEC has not issued an order preventing or suspending the use of any Preliminary Prospectus, any Issuer Free Writing Prospectus or the
Prospectus relating to the proposed offering of the Securities, and no proceeding for that purpose or pursuant to Section 8A of the 1933 Act has been instituted or, to the Company’s Knowledge threatened by the SEC.
“Knowledge” in this Agreement shall refer to what any named executive officer of the Company actually knows or reasonably should know. The Registration Statement conforms, and the Prospectus and any amendments or supplements thereto
will conform to the requirements of the 1933 Act and the Rules and Regulations. The documents incorporated, or to be incorporated, by reference in the Prospectus (but not the exhibits or schedules thereto), at the time filed with the SEC conformed
in all material respects, or will conform in all respects, to the requirements of the 1934 Act, or the 1933 Act, as applicable, and the Rules and Regulations. The Registration Statement and any amendments and supplements thereto do not contain, and
on the Closing Date, will not contain any untrue statement of a material fact and do not omit, and on the Closing Date will not omit, to state a material fact required to be stated therein or necessary to make the statements therein not misleading.
The Prospectus and any amendments and supplements thereto do not contain, and on the Closing Date will not contain, any untrue statement of a material fact; and do not omit, and on the Closing Date will not omit, to state a material fact necessary
in order to make the statements therein, in the light of the circumstances under which they were made, not misleading, provided, however, that the Company makes no representations or warranties as to information contained in or omitted
from the Prospectus, in reliance upon, and in conformity with, written information furnished to the Company by or on behalf of the Buyers, specifically for use therein. 

(ii) Each Issuer Free Writing Prospectus, as of its issue date and at all subsequent times through the completion of the public offer and sale
of the Securities or until any earlier date that the Company notified or notifies the Buyers as described in the next sentence, did not, does not and will not include any information that conflicted, conflicts or will

  
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conflict with the information contained in the Registration Statement or the Prospectus, including any document incorporated by reference therein that has not been superseded or modified. If at
any time following issuance of an Issuer Free Writing Prospectus, there occurred or occurs an event or development as a result of which such Issuer Free Writing Prospectus included or would include an untrue statement of a material fact or omitted
or would omit to state a material fact necessary in order to make the statements therein, in light of the circumstances, not misleading, the Company has notified or will notify promptly the Buyers so that any use of such Issuer Free Writing
Prospectus may cease until it is amended or supplemented. 
 (iii) The Company confirms that neither it nor any other Person acting at its
direction has provided any of the Buyers or their agents or counsel with any information that constitutes or could reasonably be expected to constitute material, nonpublic information, which immediately after the Press Release (as defined in
Section 4(h)), has not otherwise been publically disclosed. The Company understands and confirms that each of the Buyers will rely on the foregoing representations in effecting transactions in securities of the Company. All disclosure provided
to the Buyers regarding the Company, or any of its Subsidiaries, their business and the transactions contemplated hereby furnished by or on behalf of the Company is true and correct and does not contain any untrue statement of a material fact or
omit to state any material fact necessary in order to make the statements made therein, in the light of the circumstances under which they were made, not misleading. Each press release issued by the Company or any of its Subsidiaries during the
twelve (12) months preceding the date of this Agreement did not at the time of release contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements
therein, in the light of the circumstances under which they were made, not misleading. No event or circumstance has occurred or information exists with respect to the Company or any of its Subsidiaries or its or their business, properties,
prospects, operations or financial conditions, which, under applicable law, rule or regulation, requires public disclosure or announcement by the Company but which has not been so publicly announced or disclosed. The Company acknowledges and agrees
that no Buyer makes or has made any representations or warranties with respect to the transactions contemplated hereby other than those specifically set forth in Section 2. For purposes of this Agreement, “Person” means an
individual, a limited liability company, a partnership, a joint venture, a corporation, a trust, an unincorporated organization and a government or any department or agency thereof. 

(h) Offering Materials. The Company has not, directly or indirectly, distributed and will not distribute any offering
material in connection with the offering and sale of the Securities other than any Preliminary Prospectus, the Prospectus, any Issuer Free Writing Prospectus and other materials, if any, permitted under the 1933 Act. The Company will file with the
SEC all Issuer Free Writing Prospectuses in the time required under Rule 433(d) under the 1933 Act. The Company has satisfied or will satisfy the conditions in Rule 433 under the 1933 Act to avoid a requirement to file with the SEC any electronic
road show. 
 (i) Ineligible Issuer Status. At the time of filing the Registration Statement and (ii) as of the
date hereof (with such date being used as the determination date for purposes of this clause (ii)), the Company was not and is not an “ineligible issuer” (as defined in Rule 405 under the 1933 Act, without taking into account any
determination by the SEC pursuant to Rule 405 under the 1933 Act that it is not necessary that the Company be considered an ineligible issuer), including, without limitation, for purposes of Rules 164 and 433 under the 1933 Act with respect to the
offering of the Securities as contemplated by the Registration Statement. 

  
 10 

 (j) Financial Statements. The consolidated financial statements of the
Company and the Subsidiaries, together with related notes and schedules as set forth or incorporated by reference in the Registration Statement, the General Disclosure Package and the Prospectus, present fairly in all material respects the financial
position of the Company and the consolidated Subsidiaries and the results of operations and cash flows of the Company and the consolidated Subsidiaries, at the indicated dates and for the indicated periods. Such consolidated financial statements and
related schedules have been prepared in accordance with United States generally accepted accounting principles, consistently applied throughout the periods involved (“GAAP”), except as disclosed therein, and all adjustments
necessary for a fair presentation of results for such periods have been made. The summary and selected consolidated financial and statistical data included or incorporated by reference in the Registration Statement, the General Disclosure Package
and the Prospectus presents fairly in all material respects the information shown therein, at the indicated dates and for the indicated periods, and such data has been compiled on a basis consistent with the financial statements presented therein
and the books and records of the Company. All disclosures, if any, contained in the Registration Statement, the General Disclosure Package and the Prospectus regarding “non-GAAP financial measures” (as such term is defined by the Rules and
Regulations) comply in all material respects with Regulation G of the 1934 Act and Item 10 of Regulation S-K under the 1933 Act, to the extent applicable. The Company and the Subsidiaries do not have any material liabilities or obligations,
direct or contingent (including any off-balance sheet obligations or any “variable interest entities” within the meaning of Financial Accounting Standards Board Interpretation No. 46), not disclosed in the Registration Statement, the
General Disclosure Package and the Prospectus. There are no financial statements (historical or pro forma) that are required to be included in the Registration Statement, the General Disclosure Package or the Prospectus that are not included as
required. No other information provided by or at the direction of the Company to the Buyers which is not included in the SEC Documents (as defined below) contains any untrue statement of a material fact or omits to state any material fact necessary
in order to make the statements therein, in the light of the circumstance under which they are or were made, not misleading. 

(k) Accountants. EKS&H LLLP, who have certified certain of the financial statements filed with the SEC as part of,
or incorporated by reference in, the Registration Statement, the General Disclosure Package and the Prospectus, has represented to the Company that it is an independent registered public accounting firm with respect to the Company and the
Subsidiaries within the meaning of the 1933 Act and the applicable Rules and Regulations and the Public Company Accounting Oversight Board (United States). 

(l) Weaknesses or Changes in Internal Accounting Controls. It being acknowledged that the Company’s
Section 404 audit is in process at this time and the results are still pending, neither the Company nor any of the Subsidiaries has during the twelve months prior to the date hereof (i) received any notice or correspondence from any
accountant relating to any material weakness in any part of the system of internal accounting controls of the Company or any of its Subsidiaries (ii) become aware of any material weakness in its internal control over financial reporting or
change in internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting. 

  
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 (m) Sarbanes-Oxley. The Company is in compliance with all applicable
requirements of the Sarbanes-Oxley Act of 2002, as amended, and all rules and regulations promulgated thereunder, or implementing the provisions thereof (the “Sarbanes-Oxley Act”) that are effective as of the date hereof. 

(n) Absence of Litigation. There is no action, suit, proceeding, inquiry or investigation before or by the Principal
Market, any court, public board, government agency, self-regulatory organization or body pending or, to the Company’s Knowledge, threatened against or affecting the Company or any of its Subsidiaries, the Common Stock or any of the
Company’s Subsidiaries, or any of the Company’s or its Subsidiaries’ officers or directors, whether of a civil or criminal nature or otherwise, in their capacities as such, except as set forth in the Registration Statement, the
General Disclosure Package and the Prospectus, which is required to be disclosed by the Company in its periodic 1934 Act filings. The matters set forth in the Registration Statement, the General Disclosure Package and the Prospectus, individually or
in the aggregate, do not or would not reasonably be expected to have a Material Adverse Effect. 
 (o) Title. The
Company and its Subsidiaries have good and marketable title in fee simple to all real property and good and marketable title to all personal property owned by them which is material to the business of the Company and its Subsidiaries, in each case
free and clear of all liens, encumbrances and defects except for liens for the benefit of Silicon Valley Bank as disclosed in the Registration Statement and the Prospectus and other Permitted Liens, which, in the case of such other Permitted Liens,
do not materially affect the value of such property and do not interfere with the use made and proposed to be made of such property by the Company and any of its Subsidiaries. Any real property and facilities held under lease by the Company and any
of its Subsidiaries are held by them under valid, subsisting and enforceable leases conforming in all material respects to the description thereof set forth in the Registration Statement, the General Disclosure Package and the Prospectus. 

(p) Taxes. The Company and each of its Subsidiaries (i) has made or filed all U.S. federal, state and foreign
income and all other tax returns, reports and declarations required by any jurisdiction to which it is subject, (ii) has paid all taxes and other governmental assessments and charges that are material in amount, shown or determined to be due on
such returns, reports and declarations, except those being contested in good faith, and (iii) has set aside on its books provision reasonably adequate for the payment of all taxes for periods subsequent to the periods to which such returns,
reports or declarations apply. There are no unpaid taxes in any material amount claimed to be due by the taxing authority of any jurisdiction, and the officers of the Company know of no basis for any such claim. 

(q) Absence of Certain Changes. Since the respective dates as of which information is given in the Registration
Statement, the General Disclosure Package and the Prospectus, as each may be amended or supplemented, there has been no material adverse change and no material adverse development in the business, assets, properties, operations, condition (financial
or otherwise), results of operations or prospects of the Company or its 

  
 12 

 
Subsidiaries and there has not been any material transaction entered into by the Company or the Subsidiaries (including, without limitation, (i) declaration or payment of any dividends,
(ii) sale of any assets, individually or in the aggregate, in excess of $500,000 or (iii) any capital expenditures, individually or in the aggregate, in excess of $250,000, other than transactions in the ordinary course of business and
transactions described in the Registration Statement, the General Disclosure Package and the Prospectus, as each may be amended or supplemented. The Company and the Subsidiaries have no material contingent obligations which are not disclosed in the
Company’s consolidated financial statements which are included in the Registration Statement, the General Disclosure Package and the Prospectus. Neither the Company nor any of its Subsidiaries has taken any steps to seek protection pursuant to
any bankruptcy law nor does the Company have any Knowledge or reason to believe that its creditors intend to initiate involuntary bankruptcy proceedings or any actual Knowledge of any fact that would reasonably lead a creditor to do so. The Company
and its Subsidiaries, individually and on a consolidated basis, are not as of the date hereof, and after giving effect to the transactions contemplated hereby to occur at the Closing, will not be Insolvent (as defined below). For purposes of this
Agreement, (x) “Insolvent” means, with respect to any Person, (i) the present fair saleable value of such Person’s assets is less than the amount required to pay such Person’s total Indebtedness (as defined below),
(ii) such Person is unable to pay its debts and liabilities, subordinated, contingent or otherwise, as such debts and liabilities become absolute and matured, (iii) such Person intends to incur or believes that it will incur debts that
would be beyond its ability to pay as such debts mature or (iv) such Person has unreasonably small capital with which to conduct the business in which it is engaged as such business is now conducted and is proposed to be conducted,
(y) “Indebtedness” of any Person means, without duplication (A) all indebtedness for borrowed money, (B) all obligations issued, undertaken or assumed as the deferred purchase price of property or services, including,
without limitation, “capital leases” in accordance with GAAP (other than trade payables entered into in the ordinary course of business consistent with past practice), (C) all reimbursement or payment obligations with respect to
letters of credit, surety bonds and other similar instruments, (D) all obligations evidenced by notes, bonds, debentures or similar instruments, including obligations so evidenced incurred in connection with the acquisition of property, assets
or businesses, (E) all indebtedness created or arising under any conditional sale or other title retention agreement, or incurred as financing, in either case with respect to any property or assets acquired with the proceeds of such
indebtedness (even though the rights and remedies of the seller or bank under such agreement in the event of default are limited to repossession or sale of such property), (F) all monetary obligations under any leasing or similar arrangement
which, in connection with GAAP, consistently applied for the periods covered thereby, is classified as a capital lease, (G) all indebtedness referred to in clauses (A) through (F) above secured by (or for which the holder of such
Indebtedness has an existing right, contingent or otherwise, to be secured by) any mortgage, lien, pledge, charge, security interest or other encumbrance upon or in any property or assets (including accounts and contract rights) owned by any Person,
even though the Person which owns such assets or property has not assumed or become liable for the payment of such indebtedness, and (H) all Contingent Obligations in respect of indebtedness or obligations of others of the kinds referred to in
clauses (A) through (G) above, and (z) “Contingent Obligation” means, as to any Person, any direct or indirect liability, contingent or otherwise, of that Person with respect to any Indebtedness, lease, dividend or
other obligation of another Person if the primary purpose or intent of the Person incurring such liability, or the primary 

  
 13 

 
effect thereof, is to provide assurance to the obligee of such liability that such liability will be paid or discharged, or that any agreements relating thereto will be complied with, or that the
holders of such liability will be protected (in whole or in part) against loss with respect thereto. 
 (r) No
Conflicts. The execution, delivery and performance of the Transaction Documents by the Company and any of its Subsidiaries parties to any of the Transaction Documents and the consummation by the Company and any of its Subsidiaries of the
transactions contemplated hereby and thereby (including, without limitation, the issuance of the Common Shares and the Warrants and reservation for issuance and issuance of the Common Shares and the Warrant Shares) will not (i) except with
respect to the issuance of such number of Warrant Shares exceeding the number of authorized shares, subject to receipt of the Shareholder Approval and effecting the Reverse Stock Split and the Authorized Shares Increase Amendment, result in a
violation of its Articles of Incorporation or Bylaws, any memorandum or articles of association, articles of incorporation, certificate of formation, bylaws, any certificate of designations or other constituent documents of the Company or any of its
Subsidiaries, any capital stock of the Company or any of its Subsidiaries or the articles of association or bylaws of the Company or any of its Subsidiaries or (ii) after Complying with Nasdaq Rule 5250(e)(2), conflict with, or constitute a
default (or an event which with notice or lapse of time or both would become a default) in any respect under, or give to others any rights of termination, amendment, acceleration or cancellation of, any material agreement, indenture or instrument to
which the Company or any of its Subsidiaries is a party or by which the Company or any of its Subsidiaries or any of their respective properties is bound, or (iii) result in a violation of any law, rule, regulation, order, judgment or decree
(including other foreign, federal and state securities laws and regulations and the rules and regulations of The NASDAQ Capital Market (the “Principal Market”) and including all applicable laws of the State of Colorado and any
foreign, federal and state laws, rules and regulations) applicable to the Company or any of its Subsidiaries or by which any property or asset of the Company or any of its Subsidiaries is bound or affected. 

(s) Contracts. There is no document, contract or other agreement required to be described in the Registration Statement
or Prospectus or to be filed as an exhibit to the Registration Statement which is not described or filed as required by the 1933 Act or the Rules and Regulations. Each description of a contract, document or other agreement in the Registration
Statement and the Prospectus accurately reflects in all material respects the terms of the underlying contract, document or other agreement. Each contract, document or other agreement described in the Registration Statement and Prospectus or listed
in the exhibits to the Registration Statement or incorporated by reference is in full force and effect and is valid and enforceable by and against the Company in accordance with its terms (except as rights to indemnity and contribution thereunder
may be limited by federal or state securities laws and matter of public policy and except as the enforceability thereof may be limited by bankruptcy, insolvency, reorganization, moratorium or other similar laws affecting the enforcement of
creditors’ rights generally and by general equitable principle). Neither the Company nor any of its Subsidiaries nor, to the Company’s Knowledge, any other party is in default in the observance or performance of any term or obligation to
be performed by it under any such agreement or any other agreement or instrument to which the Company or its Subsidiaries is a party or by which the Company or its Subsidiaries or their respective properties or businesses may be bound, and no event
has occurred which with notice or lapse of time or both would constitute such a default, in any such case in which the default or event, individually or in the aggregate, would have a Material Adverse Effect. 

  
 14 

 (t) Regulatory Approvals. Each approval, consent, order, authorization,
designation, declaration or filing by or with any regulatory, administrative or other governmental body necessary in connection with the execution and delivery by the Company of this Agreement and the consummation of the transactions herein
contemplated (except such additional steps as may be required by the SEC, the Financial Industry Regulatory Authority, Inc. (the “FINRA”) or such additional steps as may be required under state securities or Blue Sky laws) has been
obtained or made and is in full force and effect. 
 (u) Conduct of Business. Neither the Company nor any of its
Subsidiaries is in violation of any term of or in default under any certificate of designations of any outstanding series of preferred stock of the Company (if any), its Articles of Incorporation or Bylaws or their organizational charter or
memorandum of association or articles of incorporation or articles of association or bylaws, respectively. Neither the Company nor any of its Subsidiaries is in violation of any judgment, decree or order or any statute, ordinance, rule or regulation
applicable to the Company or any of its Subsidiaries, and neither the Company nor any of its Subsidiaries will conduct its business in violation of any of the foregoing, except for possible violations which would not, individually or in the
aggregate, reasonably be expected to have a Material Adverse Effect. 
 (v) Intellectual Property. The Company
and its Subsidiaries own or possess adequate rights or licenses to use all trademarks, trade names, service marks, service mark registrations, service names, original works of authorship, patents, patent rights, copyrights, inventions, licenses,
approvals, governmental authorizations, trade secrets and other intellectual property rights and all applications and registrations therefor (“Intellectual Property Rights”) necessary to conduct their respective businesses as now
conducted. Each of patents owned by the Company or any of its Subsidiaries is listed in the Registration Statement and the Prospectus. Except as set forth in the Registration Statement and the Prospectus, none of the Company’s Intellectual
Property Rights have expired or terminated or have been abandoned or are expected to expire or terminate or are expected to be abandoned, within three years from the date of this Agreement. The Company does not have any Knowledge of any infringement
by the Company or its Subsidiaries of Intellectual Property Rights of others. There is no claim, action or proceeding being made or brought, or to the Knowledge of the Company or any of its Subsidiaries, being threatened, against the Company or any
of its Subsidiaries regarding its Intellectual Property Rights. Neither the Company nor any of its Subsidiaries is aware of any facts or circumstances which might give rise to any of the foregoing infringements or claims, actions or proceedings. The
Company and its Subsidiaries have taken reasonable security measures to protect the secrecy, confidentiality and value of all of their Intellectual Property Rights. There are no outstanding options, licenses or agreements of any kind relating to the
Intellectual Property Rights of the Company that are required to be described in the Registration Statement, the General Disclosure Package and the Prospectus and are not described therein in all material respects. The Company is not a party to or
bound by any options, licenses or agreements with respect to the Intellectual Property Rights of any other person or entity that are required to be set forth in the Prospectus and are not described therein in all material respects. None of the
technology employed by the Company and material to the Company’s business has 

  
 15 

 
been obtained or is being used by the Company in violation of any contractual obligation binding on the Company or, to the Company’s Knowledge, any of its officers, directors or
employees or, to the Company’s Knowledge, otherwise in violation of the rights of any persons; the Company has not received any written or oral communications alleging that the Company has violated, infringed or conflicted with, or, by
conducting its business as set forth in the Registration Statement, the General Disclosure Package or the Prospectus, would violate, infringe or conflict with, any of the Intellectual Property Rights of any other person or entity. The Company knows
of no material infringement by others of Intellectual Property Rights owned by or licensed to the Company. 
 (w)
Manipulation of Prices. The Company has not, and to its Knowledge no one acting on its behalf has, (i) taken, directly or indirectly, any action designed to cause or to result, or that could reasonably be expected to cause or result, in
the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of any of the Securities, (ii) other than the Agent or other agents with respect to prior offerings which have been disclosed in the
Registration Statement, the General Disclosure Package or the Prospectus, sold, bid for, purchased, or paid any compensation for soliciting purchases of, any of the Securities, or (iii) other than the Agent or other agents with respect to prior
offerings, paid or agreed to pay to any person any compensation for soliciting another to purchase any other securities of the Company. 

(x) Investment Company Act. Neither the Company nor any Subsidiary is, and upon consummation of the sale of the
Securities, and for so long any Buyer holds any Securities, will be, an “investment company,” a company controlled by an “investment company” or an “affiliated person” of, or “promoter” or “principal
underwriter” for, an “investment company” as such terms are defined in the Investment Company Act of 1940, as amended. 

(y) Internal Accounting Controls. 

(i) The Company and each of its Subsidiaries maintain a system of internal accounting controls sufficient to provide reasonable assurance that
(i) transactions are executed in accordance with management’s general or specific authorizations, (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain asset
and liability accountability, (iii) access to assets or incurrence of liabilities is permitted only in accordance with management’s general or specific authorization and (iv) the recorded accountability for assets and liabilities is
compared with the existing assets and liabilities at reasonable intervals and appropriate action is taken with respect to any difference. 

(ii) The Company maintains disclosure controls and procedures (as such term is defined in Rule 13a-15 under the 1934 Act) that are effective
in ensuring that information required to be disclosed by the Company in the reports that it files or submits under the 1934 Act is recorded, processed, summarized and reported, within the time periods specified in the rules and forms of the SEC,
including, without limitation, controls and procedures designed to ensure that information required to be disclosed by the Company in the reports that it files or submits under the 1934 Act is accumulated and communicated to the Company’s
management, including its principal executive officer or officers and its principal financial officer or officers, as appropriate, to allow timely decisions regarding required disclosure. 

  
 16 

 (z) Industry and Market Data. The statistical, industry-related and
market-related data, if any, included in the Registration Statement, the General Disclosure Package and the Prospectus are based on or derived from sources which the Company reasonably and in good faith believes are reliable and accurate, and such
data agree in all material respects with the sources from which they are derived. 
 (aa) Money Laundering Laws. The
operations of the Company and the Subsidiaries are and have been conducted at all times in compliance with applicable financial record-keeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended,
applicable money laundering statutes and applicable rules and regulations thereunder (collectively, the “Money Laundering Laws”), and no action, suit or proceeding by or before any court or governmental agency, authority or body or
any arbitrator involving the Company or any or its Subsidiaries with respect to the Money Laundering Laws is pending or, to the Company’s knowledge, threatened. 

(bb) Office of Foreign Assets Control. Neither the Company nor, to the Company’s knowledge, any director, officer,
agent, employee or affiliate of the Company is currently subject to any U.S. sanctions administered by the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”); and the Company will not directly or indirectly
use the proceeds of the offering, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity, for the purpose of financing the activities of any person currently subject to any
U.S. sanctions administered by OFAC. 
 (cc) Insurance. The Company and each of its Subsidiaries are insured by
insurers of recognized financial responsibility against such losses and risks and in such amounts as management of the Company believes to be prudent and customary in the businesses in which the Company and its Subsidiaries are engaged. Neither the
Company nor any such Subsidiary has been refused any insurance coverage sought or applied for and neither the Company nor any such Subsidiary has any reason to believe that it will not be able to renew its existing insurance coverage as and when
such coverage expires or to obtain similar coverage from similar insurers, in each case, as may be necessary to continue its business at a cost that, individually or in the aggregate, do not or would not reasonably be expected to have a Material
Adverse Effect. 
 (dd) Employee Benefits. The Company and each Subsidiary is in compliance in all material respects
with all presently applicable provisions of the Employee Retirement Income Security Act of 1974, as amended, including the regulations and published interpretations thereunder (“ERISA”); no “reportable event” (as defined
in ERISA) has occurred with respect to any “pension plan” (as defined in ERISA) for which the Company and each Subsidiary would have any material liability; the Company and each Subsidiary has not incurred and does not expect to incur
material liability under (i) Title IV of ERISA with respect to termination of, or withdrawal from, any “pension plan” or (ii) Sections 412 or 4971 of the Internal Revenue Code of 1986, as amended (the “Code”);
and each “pension plan” for which the Company or any Subsidiary would have any liability that is intended to be qualified under Section 401(a) of the Code is so qualified in all material respects and nothing has occurred, whether by
action or by failure to act, which would cause the loss of such qualification. 

  
 17 

 (ee) Employee Relations. 

(i) Neither the Company nor any of its Subsidiaries is a party to any collective bargaining agreement or employs any member of a union. The
Company and its Subsidiaries believe that its relations with its employees are good. No current executive officer of the Company or any of its Subsidiaries (as defined in Rule 501(f) of the 1933 Act) has notified the Company or any such Subsidiary
that such officer intends to leave the Company or any such Subsidiary or otherwise terminate such officer’s employment with the Company or any such Subsidiary. No current executive officer of the Company or any of its Subsidiaries is, or is now
expected to be, in violation of any material term of any employment contract, confidentiality, disclosure or proprietary information agreement, non-competition agreement, or any other contract or agreement or any restrictive covenant, and the
continued employment of each such executive officer does not subject the Company or any of its Subsidiaries to any liability with respect to any of the foregoing matters, except where such violation would not, either individually or in the
aggregate, reasonably be expected to result in a Material Adverse Effect. 
 (ii) The Company and its Subsidiaries are in compliance with
all federal, state, local and foreign laws and regulations respecting labor, employment and employment practices and benefits, terms and conditions of employment and wages and hours, except where failure to be in compliance would not, either
individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect. 
 (ff) Transactions with
Affiliates. Except as otherwise described in Schedule 3(ff), to the Company’s Knowledge, there are no affiliations or associations between any member of the FINRA and any of the Company’s officers, directors or 5% or greater
securityholders, except as set forth in the Registration Statement. There are no relationships or related-party transactions involving the Company or any of the Subsidiaries or, to the Knowledge of the Company, any other person required to be
described in the Prospectus which have not been described in the Registration Statement or the Prospectus, as required. 

(gg) Environmental Laws. The Company and its Subsidiaries (i) are in compliance with any and all Environmental Laws
(as hereinafter defined), (ii) have received all permits, licenses or other approvals required of them under applicable Environmental Laws to conduct their respective businesses and (iii) are in compliance with all terms and conditions of
any such permit, license or approval where, in each of the foregoing clauses (i), (ii) and (iii), the failure to so comply could be reasonably expected to have, individually or in the aggregate, a Material Adverse Effect. The term
“Environmental Laws” means all federal, state, local or foreign laws relating to pollution or protection of human health or the environment (including, without limitation, ambient air, surface water, groundwater, land surface or
subsurface strata), including, without limitation, laws relating to emissions, discharges, releases or threatened releases of chemicals, pollutants, contaminants, or toxic or hazardous substances or wastes (collectively, “Hazardous
Materials”) into the environment, or otherwise relating to the manufacture, processing, distribution, use, treatment, storage, disposal, transport or handling of Hazardous Materials, as well as all authorizations, codes, decrees, demands or
demand letters, injunctions, judgments, licenses, notices or notice letters, orders, permits, plans or regulations issued, entered, promulgated or approved thereunder. 

  
 18 

 (hh) Listing; 1934 Act Registration. The Common Stock is listed for
trading on the Principal Market. The Company has taken no action designed to, or likely to have the effect of, terminating the registration of the Common Stock under the 1934 Act or the quotation of the Common Stock on the Principal Market, and
except as disclosed in Schedule 3(hh), the Company has not received any notification that the SEC or the Principal Market is contemplating terminating such registration or quotation. Without limiting the generality of the foregoing, except as
disclosed in Schedule 3(hh), the Company is not in violation of any of the rules, regulations or requirements of the Principal Market and has no Knowledge of any facts or circumstances that would reasonably lead to delisting or suspension of
the Common Stock by the Principal Market in the foreseeable future. During the two (2) years prior to the date hereof, the Common Stock has been designated for quotation on the Principal Market. During the two (2) years prior to the date
hereof, (i) trading in the Common Stock has not been suspended by the SEC or the Principal Market and (ii) the Company has received no communication, written or oral, from the SEC or the Principal Market regarding the suspension or
delisting of the Common Stock from the Principal Market. The Company and its Subsidiaries possess all certificates, authorizations and permits issued by the appropriate federal, state or foreign regulatory authorities necessary to conduct their
respective businesses, except where the failure to possess such certificates, authorizations or permits would not have, individually or in the aggregate, a Material Adverse Effect, and neither the Company nor any such Subsidiary has received any
notice of proceedings relating to the revocation or modification of any such certificate, authorization or permit. 
 (ii)
Contributions; Foreign Corrupt Practices. Neither the Company, nor any of its Subsidiaries, nor any director, officer, agent, employee or other Person acting on behalf of the Company or any of its Subsidiaries has, in the course of its
actions for, or on behalf of, the Company or any of its Subsidiaries (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expenses relating to political activity; (ii) made any direct or
indirect unlawful payment to any foreign or domestic government official or employee from corporate funds; (iii) violated or is in violation of any provision of the U.S. Foreign Corrupt Practices Act of 1977, as amended; or (iv) made any
unlawful bribe, rebate, payoff, influence payment, kickback or other unlawful payment to any foreign or domestic government official or employee. 

(jj) No Integrated Offering. The Company has not sold or issued any securities that would be integrated with the
offering of the Securities contemplated by this Agreement pursuant to the 1933 Act, the Rules and Regulations or the interpretations thereof by the SEC. None of the Company, its Subsidiaries, any of their affiliates, and any Person acting on their
behalf has, directly or indirectly, made any offers or sales of any security or solicited any offers to buy any security, under circumstances that would cause this offering of the Securities to require approval of shareholders of the Company for
purposes of any applicable shareholder approval provisions, including, without limitation, Nasdaq Rule 5635. None of the Company, its Subsidiaries, their affiliates and any Person acting on their behalf will take any action or steps referred to in
the preceding sentence that would cause the offering of the Securities to be integrated with other offerings for purposes of any such applicable shareholder approval provisions. 

  
 19 

 (kk) Brokerage Fees; Commissions. Except as set forth in any of the
Transaction Documents, the Registration Statement and the Prospectus, neither the Company nor any of its Subsidiaries is a party to any contract, agreement or understanding with any person that would give rise to a valid claim against the Company or
the Buyers for a brokerage commission, finder’s fee or like payment in connection with the offering and sale of the Securities. The Company shall pay, and hold the Buyer harmless against, any liability, loss or expense (including, without
limitation, attorneys’ fees and out-of-pocket expenses) arising in connection with any such claim. The Company acknowledges that it has engaged WestPark Capital, Inc. as placement agent (the “Agent”) in connection with the sale
of the Securities. Other than the Agent, neither the Company nor any of its Subsidiaries has engaged any placement agent or other agent in connection with the sale of the Securities. 

(ll) Consents. Neither the Company nor any of its Subsidiaries is required to obtain any consent, authorization or order
of, or make any filing or registration with, any court, governmental agency or any regulatory or self-regulatory agency or any other Person in order for it to execute, deliver or perform any of its obligations under or contemplated by the
Transaction Documents, in each case in accordance with the terms hereof or thereof which have not been previously obtained or made. All consents, authorizations, orders, filings and registrations which the Company or any of its Subsidiaries is
required to obtain pursuant to the preceding sentence have been obtained or effected on or prior to the Closing Date, and the Company and its Subsidiaries are unaware of any facts or circumstances that might prevent the Company or any of its
Subsidiaries from obtaining or effecting any of the registration, application or filings pursuant to the preceding sentence. The issuance by the Company of the Securities shall not have the effect of delisting or suspending the Common Stock from the
Principal Market. 
 (mm) Acknowledgment Regarding Buyer’s Purchase of Securities. The Company acknowledges and
agrees that each Buyer is acting solely in the capacity of an arm’s length purchaser with respect to the Transaction Documents and the transactions contemplated hereby and thereby and that no Buyer is (i) an officer or director of the
Company or any of its Subsidiaries, (ii) an “affiliate” of the Company or any of its Subsidiaries (as defined in Rule 144) or (iii) to the Knowledge of the Company, a “beneficial owner” of more than 10% of the shares of
Common Stock (as defined for purposes of Rule 13d-3 of the 1934 Act). The Company further acknowledges that no Buyer is acting as a financial advisor or fiduciary of the Company or any of its Subsidiaries (or in any similar capacity) with respect to
the Transaction Documents and the transactions contemplated hereby and thereby, and any advice given by a Buyer or any of its representatives or agents in connection with the Transaction Documents and the transactions contemplated hereby and thereby
is merely incidental to such Buyer’s purchase of the Securities. The Company further represents to each Buyer that the Company’s decision to enter into the Transaction Documents has been based solely on the independent evaluation by the
Company and its representatives. 

  
 20 

 (nn) Dilutive Effect. The Company understands and acknowledges that the
number of Warrant Shares issuable pursuant to the terms of the Warrants will increase in certain circumstances. The Company further acknowledges that its obligation to issue Warrant Shares upon exercise of the Warrants in accordance with this
Agreement and the Warrants is, in each case, absolute and unconditional regardless of the dilutive effect that such issuance may have on the ownership interests of other shareholders of the Company, subject to the terms of the Warrants and the other
Transaction Documents. 
 (oo) Application of Takeover Protections; Rights Agreement. The Company and its board of
directors have taken all necessary action, if any, in order to exempt the Company’s issuance of the Securities and any Buyer’s ownership of the Securities from the provisions of any control share acquisition, business combination, poison
pill (including any distribution under a rights agreement) or other similar anti-takeover provision under the Articles of Incorporation of the Company or the laws of the state of its incorporation which is or could become applicable to any Buyer as
a result of the transactions contemplated by this Agreement, including, without limitation, the Company’s issuance of Securities and each Buyer’s ownership of the Securities. Except as set forth in the Registration Statement and the
Prospectus, the Company does not have any shareholder rights plan or similar arrangement relating to accumulations of beneficial ownership of Common Stock or a change in control of the Company. 

(pp) Subsidiary Rights. The Company or one of its Subsidiaries has the unrestricted right to vote, and (subject to
limitations imposed by applicable law) to receive dividends and distributions on, all capital securities of its Subsidiaries as owned by the Company or such Subsidiary. 

(qq) Off Balance Sheet Arrangements. There is no transaction, arrangement, or other relationship between the Company and
an unconsolidated or other off balance sheet entity that is required to be disclosed by the Company in its 1934 Act filings and is not so disclosed or that otherwise would be reasonably likely to have a Material Adverse Effect. 

(rr) Transfer Taxes. On the Closing Date, all stock transfer or other similar taxes (other than income or similar taxes)
which are required to be paid in connection with the sale and transfer of the Securities to be sold to each Buyer hereunder will be, or will have been, fully paid or provided for by the Company, and all laws imposing such taxes will be or will have
been complied with. 
 (ss) Acknowledgement Regarding Buyers’ Trading Activity. Anything in this Agreement or
elsewhere herein to the contrary notwithstanding, it is understood and acknowledged by the Company (i) that none of the Buyers have been asked by the Company or its Subsidiaries to agree, nor has any Buyer agreed with the Company or its
Subsidiaries, to desist from purchasing or selling, long and/or short, securities of the Company, or “derivative” securities based on securities issued by the Company or to hold the Securities for any specified term; (ii) that past or
future open market or other transactions by any Buyer, including, without limitation, short sales or “derivative” transactions, before or after the closing of this or future transactions, may negatively impact the market price of the
Company’s publicly-traded securities; (iii) that any Buyer, and counter parties in “derivative” transactions to which any such Buyer is a party, directly or indirectly, presently may have a “short” position in the
Common Stock; and (iv) that such Buyer shall not be deemed to have any affiliation with or 

  
 21 

 
control over any arm’s length counter-party in any “derivative” transaction. The Company further understands and acknowledges that (a) one or more Buyers may engage in hedging
and/or trading activities at various times during the period that the Securities are outstanding, including, without limitation, during the period that the value of the Warrant Shares deliverable with respect to Warrants are being determined and
(b) such hedging and/or trading activities (if any) could reduce the value of the existing shareholders’ equity interests in the Company at and after the time that the hedging and/or trading activities are being conducted. The Company
acknowledges that such aforementioned hedging and/or trading activities do not constitute a breach of this Agreement, the Warrants or any of the documents executed in connection herewith. 

(tt) U.S. Real Property Holding Corporation. The Company is not, has never been, and so long as any Securities remain
outstanding, shall not become, a U.S. real property holding corporation within the meaning of Section 897 of the Code and the Company shall so certify upon any Buyer’s request. 

(uu) Shell Company Status. The Company is not, and has never been, an issuer identified in Rule 144(i)(1). 

(vv) Bank Holding Company. Neither the Company nor any of its Subsidiaries or affiliates is subject to the Bank Holding
Company Act of 1956, as amended (the “BHCA”) and to regulation by the Board of Governors of the Federal Reserve System (the “Federal Reserve”). Neither the Company nor any of its Subsidiaries or affiliates owns or
controls, directly or indirectly, five percent (5%) or more of the outstanding shares of any class of voting securities or twenty-five percent (25%) or more of the total equity of a bank or any entity that is subject to the BHCA and to
regulation by the Federal Reserve. Neither the Company nor any of its Subsidiaries or affiliates exercises a controlling influence over the management or policies of a bank or any entity that is subject to the BHCA and to regulation by the Federal
Reserve. 
 (ww) SEC Documents; Financial Statements. Except for the Company’s current report on Form 8-K filed
on December 18, 2013, which has been amended by the amended current report on Form 8-K/A filed on August 29, 2014, during the two (2) years prior to the date hereof, the Company has timely filed all reports, schedules, forms,
statements and other documents required to be filed by it with the SEC pursuant to the reporting requirements of the 1934 Act (all of the foregoing filed prior to the date hereof, and all exhibits included therein and financial statements, notes and
schedules thereto and documents incorporated by reference therein being hereinafter referred to as the “SEC Documents”). The Company has delivered to the Buyers or their respective representatives true, correct and complete copies
of the SEC Documents not available on the EDGAR system other than annual reports to security holders filed with the SEC as “ARS” filings, which “ARS” filings conformed in form and substance to the reports filed by the Company
with the SEC. As of their respective filing dates, the SEC Documents complied in all material respects with the requirements of the 1934 Act and the rules and regulations of the SEC promulgated thereunder applicable to the SEC Documents, and none of
the SEC Documents, at the time they were filed with the SEC, contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of
the circumstances under which they were made, not misleading. As of their respective filing dates, the financial statements of 

  
 22 

 
the Company included in the SEC Documents complied as to form in all material respects with applicable accounting requirements and the published rules and regulations of the SEC with respect
thereto. Such financial statements have been prepared in accordance with GAAP, consistently applied, during the periods involved (except (i) as may be otherwise indicated in such financial statements or the notes thereto, or (ii) in the
case of unaudited interim statements, to the extent they may exclude footnotes or may be condensed or summary statements) and fairly present in all material respects the financial position of the Company as of the dates thereof and the results of
its operations and cash flows for the periods then ended (subject, in the case of unaudited statements, to normal year-end audit adjustments). 

(xx) Lock-Up Agreements. The Company and each of the parties set forth on Exhibit F-1 hereto has executed and
delivered to the Company a lock-up agreement in the form attached hereto as Exhibit F-2 (collectively, the “Lock-Up Agreements”). 

(yy) No Undisclosed Events, Liabilities, Developments or Circumstances. No event, liability, development or circumstance
has occurred or exists, or is contemplated to occur with respect to the Company, its Subsidiaries or their respective business, properties, prospects, operations or financial condition, that would be required to be disclosed by the Company under
applicable securities laws on a registration statement on Form S-1 filed with the SEC relating to an issuance and sale by the Company of its Common Stock and which has not been publicly announced. 

(zz) Stock Option Plans. Except as disclosed in the Registration Statement or the Prospectus, each stock option granted
by the Company was granted (i) in accordance with the terms of the applicable stock option plan of the Company and (ii) with an exercise price at least equal to the fair market value of the Common Stock on the date such stock option would
be considered granted under GAAP and applicable law. No stock option granted under the Company’s stock option plan has been backdated. The Company has not knowingly granted, and there is no and has been no policy or practice of the Company to
knowingly grant, stock options prior to, or otherwise knowingly coordinate the grant of stock options with, the release or other public announcement of material information regarding the Company or its Subsidiaries or their financial results or
prospects. 
 (aaa) Indebtedness and Other Contracts. 

(i) Neither the Company nor any of its Subsidiaries, except as disclosed in the Registration Statement and the Prospectus or which is
otherwise Permitted Indebtedness (as defined below), (i) has any outstanding Indebtedness, individually or in the aggregate, in excess of $100,0000, (ii) is a party to any contract, agreement or instrument, the violation of which, or
default under which, by the other party(ies) to such contract, agreement or instrument could reasonably be expected to result in a Material Adverse Effect, (iii) is in violation of any term of or in default under any contract, agreement or
instrument relating to any Indebtedness, except where such violations and defaults would not result, individually or in the aggregate, in a Material Adverse Effect, or (iv) is a party to any contract, agreement or instrument relating to any
Indebtedness, the performance of which, in the judgment of the Company’s officers, has or is expected to have a Material Adverse Effect. The Registration Statement and the Prospectus provide a detailed description of the material terms of any
such outstanding Indebtedness. 

  
 23 

 (ii) As used in this subsection and elsewhere in this Agreement: 

(1) “Liens” means any mortgage, lien, pledge, charge, security interest or other encumbrance upon or in any
property or assets (including accounts and contract rights) owned by the Company or any of its Subsidiaries. 
 (2)
“Permitted Indebtedness” means (i) trade payables incurred in the ordinary course of business consistent with past practice, (ii) Permitted Senior Indebtedness, (iii) Indebtedness secured by Permitted Liens described
in clauses (iv) and (vi) of the definition of Permitted Liens, (iv) any synthetic lease obligations, or other obligations which are required to be treated as Indebtedness under GAAP, but are otherwise operating lease obligations,
(v) letters of credit or bonds entered into in the Company’s ordinary course of business in an amount not to exceed $100,000 in the aggregate and (vi) Indebtedness to Riverside Renewable Energy Investment LLC, as disclosed in the
Registration Statement and the Prospectus. 
 (3) “Permitted Liens” means (i) any Lien for taxes not
yet due or delinquent or being contested in good faith by appropriate proceedings for which adequate reserves have been established in accordance with GAAP, (ii) any statutory Lien arising in the ordinary course of business by operation of law
with respect to a liability that is not yet due or delinquent, (iii) any Lien created by operation of law, such as materialmen’s liens, mechanics’ liens and other similar liens, arising in the ordinary course of business with respect
to a liability that is not yet due or delinquent or that are being contested in good faith by appropriate proceedings, (iv) Liens (A) upon or in any equipment acquired or held by the Company or any of its Subsidiaries to secure the
purchase price of such equipment or Indebtedness incurred solely for the purpose of financing the acquisition or lease of such equipment, or (B) existing on such equipment at the time of its acquisition, provided that the Lien is confined
solely to the property so acquired and improvements thereon, and the proceeds of such equipment, (v) Liens incurred in connection with the extension, renewal or refinancing of the indebtedness secured by Liens of the type described in clause
(iv) above, provided that any extension, renewal or replacement Lien shall be limited to the property encumbered by the existing Lien and the principal amount of the Indebtedness being extended, renewed or refinanced does not increase,
(vi) leases or subleases and licenses and sublicenses granted to others in the ordinary course of the Company’s business, not interfering in any material respect with the business of the Company and its Subsidiaries taken as a whole,
(vii) Liens in favor of customs and revenue authorities arising as a matter of law to secure payments of custom duties in connection with the importation of goods, (viii) Liens arising from judgments, decrees or attachments,
(ix) Liens securing Permitted Senior Indebtedness as in effect on the date hereof. 
 (4) “Permitted Senior
Indebtedness” means Indebtedness incurred pursuant to that certain Loan and Security Agreement dated as of December 19, 2011 by and among Real Goods Energy Tech, INC., Real Goods Trading Corporation,

  
 24 

 
Earth Friendly Energy Group Holdings, LLC, Alteris Renewables, INC., Earth Friendly Energy Group, LLC, Solar Works, LLC, Alteris RPS, LLC and Alteris ISI, LLC and Silicon Valley Bank, as such
Indebtedness may be refinanced, amended or extended. 
 (bbb) No Additional Agreements. Neither the Company nor any of
its Subsidiaries has any agreement or understanding with any Buyer with respect to the transactions contemplated by the Transaction Documents other than as specified in the Transaction Documents. 

(ccc) No Disagreements with Accountants and Lawyers. There are no material disagreements of any kind presently existing,
or reasonably anticipated by the Company to arise, between the Company and the accountants and lawyers formerly or presently employed by the Company and the Company is current with respect to any fees owed to its accountants and lawyers which could
affect the Company’s ability to perform any of its obligations under any of the Transaction Documents. In addition, on or prior to the date hereof, the Company had discussions with its accountants about its financial statements previously filed
with the SEC. Based on those discussions, the Company has no reason to believe that it will need to restate any such financial statements or any part thereof. 

4. COVENANTS. 

(a) Best Efforts. Each party shall use its reasonable best efforts timely to satisfy each of the covenants and the
conditions to be satisfied by it as provided in Sections 6 and 7 of this Agreement. 
 (b) Maintenance of Registration
Statement. 
 (i) For so long as any of the Warrants remain outstanding or are potentially issuable hereunder, the Company shall use its
reasonable best efforts to maintain the effectiveness of the Registration Statement for the issuance thereunder of the Registrable Securities (as defined below); provided that, if at any time while any Warrants are outstanding, the Company shall be
ineligible to utilize Form S-3 (or any successor form) for the purpose of issuance of the Registrable Securities (as defined below) the Company shall use its reasonable best efforts to promptly amend or supplement the Registration Statement or, if
necessary, file a new registration statement on such other form as may be necessary to maintain the effectiveness of the Registration Statement or such other registration statement for this purpose. For the purpose of this Agreement,
“Registrable Securities” means at least the sum of (i) 200,000,000 shares of Common Stock (as adjusted for any stock dividend, stock split, stock combination, reclassification or similar transaction occurring after the date
hereof) or such greater number of shares determined by taking into account the Maximum Eligibility Number (as defined in each of the Series B Warrants, the Series C Warrants and the Series D Warrants, without giving effect to the proviso set forth
in such definitions) and (ii) any shares of capital stock of the Company issued or issuable with respect to the Common Shares, the Warrants and/or the Warrant Shares as a result of any stock split, stock dividend, recapitalization, exchange,
shareholder approval or similar event or adjustment or otherwise, without regard to any limitations on issuance, conversion or exercise thereof. 

  
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 (ii) If, on any day after the Closing Date, issuances of all of the Registrable
Securities cannot be made upon exercise of the Warrants pursuant to the Registration Statement (including, without limitation, because of a failure to keep the Registration Statement effective, failure to file or cause to become effective any
supplements or amendments thereto or other public filings necessary, failure to disclose such information as is necessary for sales to be made pursuant to the Registration Statement, a suspension or delisting of the Common Stock on its principal
trading market or exchange, failure to register or list a sufficient number of shares of Common Stock, or ineligibility to issue such Registrable Securities under the Registration Statement pursuant to General Instruction I.B.4.) (a
“Maintenance Failure”) then, as partial relief for the damages to any holder of Securities (an “Investor”) by reason of any such delay in or reduction of its ability to receive Registrable Securities upon exercise
of the Warrants (which remedy shall not be exclusive of any other remedies available at law or in equity), the Company shall pay to each Investor an amount in cash equal to one percent (1.0%) of the sum of (x) the aggregate Purchase Price
of such Investor’s Common Shares and the Series E Warrants and (y) the Aggregate Exercise Price (as defined in the Series B Warrants) paid by such Investor for the exercise of the Series B Warrants of such Investor on each of the following
dates: (i) the initial day of a Maintenance Failure; and (ii) on every thirtieth (30th) day (pro-rated for periods totaling less than thirty (30) days) after the initial day after a Maintenance Failure until such Maintenance
Failure is cured. The Company shall also pay the reasonable fees of legal counsel of such Investor to enforce the provisions hereof. The payments to which an Investor shall be entitled pursuant to this Section 4(b) are referred to herein as
“Registration Delay Payments.” Registration Delay Payments shall be paid on the initial day of a Maintenance Failure, as applicable, and thereafter on the earlier of (I) the thirtieth (30th) day after the event or failure
giving rise to the Registration Delay Payments has occurred and (II) the third (3rd) Business Day after the event or failure giving rise to the Registration Delay Payments is cured. In the event the Company fails to make Registration Delay
Payments in a timely manner, such Registration Delay Payments shall bear interest at the rate of one and one-half percent (1.5%) per month (prorated for partial months) until paid in full.  

(c) Prospectus Supplement and Blue Sky. In the manner required by law, the Company shall have delivered to the Buyers,
and as soon as practicable after the Closing, the Company shall file, the Prospectus Supplement with respect to the Securities as required under and in conformity with the 1933 Act, including Rule 424(b) thereunder. If required, the Company, on or
before the Closing Date, shall take such action as the Company shall reasonably determine is necessary in order to obtain an exemption for or to qualify the Securities for sale to the Buyers at the Closing pursuant to this Agreement under applicable
securities or “Blue Sky” laws of the states of the United States (or to obtain an exemption from such qualification), and shall provide evidence of any such action so taken to the Buyers on or prior to the Closing Date. The Company shall
make all filings and reports relating to the offer and sale of the Securities required under applicable securities or “Blue Sky” laws of the states of the United States following the Closing Date. 

(d) Use of Proceeds. The Company will use the proceeds from the sale of the Securities for general corporate purposes,
for working capital purposes and/or for any scheduled repayment of any outstanding Permitted Senior Indebtedness, but not for the redemption or repurchase of any of its or its Subsidiaries’ equity securities. 

  
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 (e) Listing. The Company shall promptly secure the listing of all of the
authorized Common Shares and Warrant Shares and promptly secure the listing of all of the Warrant Shares not authorized at Closing promptly upon receiving the Shareholder Approval and effecting the Reverse Stock Split and the Authorized Shares
Increase Amendment, in each case, upon each securities exchange and automated quotation system, if any, upon which the Common Stock is then listed, including the Principal Market (subject to official notice of issuance) and shall use its reasonable
best efforts to maintain, in accordance with the Transaction Documents, the listing of all Common Shares and Warrant Shares, from time to time issuable under the terms of the Transaction Documents (including, without limitation, by
(1) completing the Reverse Stock Split within five (5) Business Days of the Reverse Stock Split Resolution Date (as defined in Section 4(p)) and (2) completing the Authorized Shares Increase Amendment within five
(5) Business Days of Authorized Shares Increase Resolution Date (as defined in Section 4(p))). The Company shall maintain the authorization for quotation of the Common Stock, on the Principal Market, or if such authorization is not able to
be maintained, on another Eligible Market (as defined in the Warrants). Neither the Company nor any of its Subsidiaries shall take any action which would be reasonably expected to result in the delisting or suspension of the Common Stock on the
Principal Market. The Company shall pay all fees and expenses in connection with satisfying its obligations under this Section 4(e). 

(f) Fees. The Company shall reimburse the Lead Investor (a Buyer) or its designee(s) (in addition to any other expense
amounts paid to any Buyer or its counsel prior to the date of this Agreement) for all costs and expenses incurred in connection with the transactions contemplated by the Transaction Documents (including all legal fees and disbursements in connection
therewith, documentation and implementation of the transactions contemplated by the Transaction Documents and due diligence in connection therewith), without the prior written approval of the Company, in an amount not to exceed $170,000, which
amount, at the option of the Buyer, may be withheld by such Buyer from its Purchase Price at the Closing to the extent not previously reimbursed by the Company. The Company shall be responsible for the payment of any placement agent’s fees,
financial advisory fees, or broker’s commissions (other than for Persons engaged by any Buyer) relating to or arising out of the transactions contemplated hereby, including, without limitation, any fees or commissions payable to the Agent. 

(g) Pledge of Securities. The Company acknowledges and agrees that the Securities may be pledged by any Investor in
connection with a bona fide margin agreement or other bona fide loan or financing arrangement that is secured by the Securities. Such pledge of Securities shall not be deemed to be a transfer, sale or assignment of the Securities hereunder, and no
Investor effecting such pledge of Securities shall be required to provide the Company with any notice thereof or otherwise make any delivery to the Company pursuant to this Agreement or any other Transaction Document. The Company hereby agrees,
subject to applicable securities laws, to execute and deliver such documentation as a pledgee of the Securities may reasonably request in connection with a pledge of the Securities to such pledgee by an Investor. 

(h) Disclosure of Transactions and Other Material Information. The Company shall (i) on or before 9:00 a.m., New York
City time, on February 24, 2015, issue a press release reasonably acceptable to the Buyers describing the terms of the transactions contemplated by the Transaction Documents (the “Press Release”) and (ii) on or before 12:00
p.m., New York City time, on February 24, 2015 file a Current Report on Form 8-K reasonably acceptable to Buyers describing the terms 

  
 27 

 
of the transactions contemplated by the Transaction Documents in the form required by the 1934 Act and attaching the material Transaction Documents (including, without limitation, this
Agreement, the form of Warrants, the form of the Voting Agreement and the form of Lock-Up Agreement) as exhibits to such filing (including all attachments), the “8-K Filing”). As of immediately following the issuance of the Press
Release, no Buyer shall be in possession of any material, nonpublic information received from the Company, any of its Subsidiaries or any of their respective officers, directors, employees, affiliates or agents, that is not disclosed in the Press
Release or in prior filings with the SEC. In addition, effective upon the issuance of the Press Release, the Company acknowledges and agrees that any and all confidentiality or similar obligations under any agreement, whether written or oral,
between the Company, any of its Subsidiaries or any of their respective officers, directors, affiliates, employees or agents, on the one hand, and any of the Buyers or any of their affiliates, on the other hand, shall terminate. The Company
understands and confirms that each of the Buyers will rely on the foregoing in effecting transactions in securities of the Company. The Company shall not, and shall cause each of its Subsidiaries and its and each of their respective officers,
directors, employees, affiliates and agents, not to, provide any Buyer with any material, nonpublic information regarding the Company or any of its Subsidiaries from and after the issuance of the Press Release without the express prior written
consent of such Buyer. If a Buyer has, or believes it has, received any such material, nonpublic information regarding the Company or any of its Subsidiaries from the Company, any of its Subsidiaries or any of their respective officers, directors,
employees, affiliates or agents, it may provide the Company with written notice thereof in which case the Company shall, within two (2) Trading Days (as defined in the Warrants) of receipt of such notice, make public disclosure of such
material, nonpublic information. In the event of a breach of the foregoing covenant by the Company, any of its Subsidiaries, or any of its or their respective officers, directors, employees, affiliates and agents, in addition to any other remedy
provided herein or in the Transaction Documents, a Buyer shall have the right to make a public disclosure, in the form of a press release, public advertisement or otherwise, of such material, nonpublic information without the prior approval by the
Company, its Subsidiaries, or any of its or their respective officers, directors, employees, affiliates or agents. No Buyer shall have any liability to the Company, its Subsidiaries, or any of its or their respective officers, directors, employees,
affiliates or agents for any such disclosure. To the extent the Company or any of its or their respective officers, directors, employees, affiliates or agents delivers any material, non-public information to a Buyer without such Buyer’s
consent, the Company hereby covenants and agrees that such Buyer shall not have any duty of confidentiality to the Company, any of its Subsidiaries or any of their respective officers, directors, employees, affiliates or agents with respect to, or a
duty to the Company, any of its Subsidiaries or any of their respective officers, directors, employees, affiliates or agents not to trade on the basis of, such material, non-public information. Subject to the foregoing, neither the Company, its
Subsidiaries nor any Buyer shall issue any press releases or any other public statements with respect to the transactions contemplated by the Transaction Documents; provided, however, that the Company shall be entitled, without the
prior approval of any Buyer, to make any press release or other public disclosure with respect to such transactions (i) in substantial conformity with the Press Release and 8-K Filing and contemporaneously therewith and (ii) as is required
by applicable law, regulation or any Eligible Market on which the Company’s securities are then listed or quoted (provided that in the case of clause (i) each Buyer shall be consulted by the Company in connection with any such press
release or other public disclosure  

  
 28 

 
prior to its release). Without the prior written consent of any applicable Buyer, neither the Company nor any of its Subsidiaries or affiliates shall disclose the name of such Buyer in any
filing, announcement, release or otherwise other than in connection with the Registration Statement unless such disclosure is required by law, regulation or any Eligible Market on which the Company’s securities are then listed or quoted. As
used herein, “Business Day” means any day other than Saturday, Sunday or other day on which commercial banks in The City of New York are authorized or required by law to remain closed. 

(i) Additional Warrants; Variable Securities. So long as any Buyer beneficially owns any Securities, the Company will
not issue any Warrants other than to the Buyers as contemplated hereby. During the six (6) month period following the Closing, the Company shall not, in any manner, issue or sell any rights, warrants or options to subscribe for or purchase
Common Stock or directly or indirectly convertible into or exchangeable or exercisable for Common Stock at a price which varies or may vary with the market price of the Common Stock, including by way of one or more reset(s) to any fixed price unless
the conversion, exchange or exercise price of any such security cannot be less than the then applicable Exercise Price (as defined in each of the Series A Warrants, the Series B Warrants and the Series C Warrants) with respect to the Common Stock
into which any Warrant is exercisable. Notwithstanding the foregoing, the Company may issue shares of Common Stock upon conversion of Options and Convertible Securities (each as defined in Section 4(o)) which are outstanding on the day
immediately preceding the date hereof; provided that the terms of such Options or Convertible Securities are not amended, modified or changed on or after the date hereof without the prior written consent of the Required Holders;
provided, further, that the Company shall be permitted to effect an Option repricing with respect to employee options under its existing Long-Term Incentive Plan. 

(j) Corporate Existence. So long as any Buyer beneficially owns any Securities, the Company shall (i) maintain its
corporate existence and (ii) not be party to any Fundamental Transaction (as defined in the Warrants) unless the Company is in compliance with the applicable provisions governing Fundamental Transactions set forth in the Warrants. 

(k) Reservation of Shares. From and after the Company’s receipt of the Shareholder Approval and its
effecting each of the Reverse Stock Split and the Authorized Shares Increase Amendment (such date, the “Authorized Shares Increase Date”), the Company shall increase the number of shares of Common Stock reserved for issuance
pursuant to the Transaction Documents such that the aggregate number of shares of Common Stock so reserved shall not be not less than 200,000,000 shares of Common Stock (as adjusted for any stock dividend, stock split, stock combination,
reclassification or similar transaction occurring after the date hereof) or such greater number of shares of Common Stock determined by taking into account the Maximum Eligibility Number (as defined in each of the Series B Warrants, the Series C
Warrants and the Series D Warrants, without giving effect to the proviso set forth in such definitions) (the “Required Reserve Amount”), which amount shall at all times be allocable among any of the Warrants at the sole discretion
of the Buyers or the transferees of the Securities. So long as any Buyer owns any Securities, the Company shall take all action necessary to at all times (i) until the Authorized Shares Increase Date, have authorized, and reserved for issuance
the Initial Required Reserve Amount and (ii) as of the Authorized Shares Increase Date, have authorized, and reserved for issuance the applicable Required Reserve  

  
 29 

 
Amount. If at any time the number of shares of Common Stock authorized and reserved for issuance is not sufficient to meet (i) until the Authorized Shares Increase Date, the Initial Required
Reserve Amount and (ii) as of the Authorized Shares Increase Date, the Required Reserve Amount, then, in each case, the Company will promptly take all corporate action necessary to authorize and reserve a sufficient number of shares, including,
without limitation, calling a special meeting of shareholders to authorize additional shares to meet the Company’s obligations under Section 3(e), in the case of an insufficient number of authorized shares, obtain shareholder approval of
an increase in such authorized number of shares, and voting the management shares of the Company in favor of an increase in the authorized shares of the Company to ensure that the number of authorized shares is sufficient to meet the Initial
Required Reserve Amount or the Required Reserve Amount, as applicable. Upon any increase in the number of authorized or unreserved shares of Common Stock of the Company following the date hereof, the Company shall use such increased number of
authorized shares to satisfy its obligations to keep the Initial Required Reserve Amount or the Required Reserve Amount of shares, as applicable, reserved for the Securities before reserving or using shares for any other purpose. Notwithstanding
anything to the contrary herein or in any of the Transaction Documents, until the Company’s receipt of the Shareholder Approval and its effecting each of the Reverse Stock Split and the Authorized Shares Increase Amendment, (i) the Company
shall not issue any shares of Common Stock to the Agent upon exercise of the Warrants issued to the Agent by the Company as compensation for the transactions contemplated by this Agreement (the “Agent Warrants”) and (ii) none
of the shares reserved as part of the Initial Required Reserve Amount shall be allocated or allocable for the shares of Common Stock issuable upon exercise of the Agent Warrants. The initial number of shares of Common Stock reserved for exercise of
the Warrants and each increase in the number of shares so reserved shall be allocated pro rata among the Purchasers, based on the number of shares of Common Stock issuable upon exercise of the Series A Warrants (without regard to any limitations in
exercise) issued to each Purchaser on the Issuance Date (the “Authorized Share Allocation”). In the event that a Purchaser shall sell or otherwise transfer any of its Warrants, each transferee shall be allocated a pro rata portion
of such holder’s Authorized Share Allocation. Any shares of Common Stock reserved and allocated to any Person which ceases to hold any Warrants shall be allocated to the holders of the remaining Warrants, pro rata based on the shares of Common
Stock issuable upon exercise of the Warrants then held by such holders (without regard to any limitations on the exercise of the Warrants). 

(l) Conduct of Business. The business of the Company and its Subsidiaries shall not be conducted in violation of any
law, ordinance or regulation of any governmental entity, except where such violations would not result, either individually or in the aggregate, in a Material Adverse Effect. 

(m) Lock-Up. The Company shall not amend or waive any provision of the Lock-Up Agreements except to extend the term of
the lock-up period contained therein and shall enforce the provisions of the Lock-Up Agreements in accordance with their terms. If any party to a Lock-Up Agreement breaches any provision of a Lock-Up Agreement, the Company shall promptly use its
best efforts to seek specific performance of the terms of such Lock-Up Agreement. 

  
 30 

 (n) Voting Agreement. The Company shall use its reasonable best
efforts to effectuate the transactions contemplated by the Voting Agreement substantially in the form attached hereto as Exhibit G (the “Voting Agreement”), executed on or prior to the Closing by the Company, Riverside
Renewable Energy Investments, LLC and the Company’s officers and directors holding no less than 14.96% of the issued and outstanding Common Stock plus the number of shares of Common Stock held by the Company’s officers and directors
signing the Voting Agreement (collectively, the “Principal Shareholders”). The Company shall not amend or waive any provision of the Voting Agreement and shall enforce the provisions of the Voting Agreement in accordance with
its terms. If any of the Principal Shareholders breaches any provision of the Voting Agreement, the Company shall promptly use its best efforts to seek specific performance of the terms of such Voting Agreement in accordance with the terms
thereof. In addition, if the Company receives any notice from any of the Principal Shareholders pursuant to the Voting Agreement, the Company shall promptly, but in no event later than two (2) Business Days, deliver a copy of such notice
to each Buyer. 
 (o) Additional Issuances of Securities. 

(i) For purposes of this Section 4(o), the following definitions shall apply. 

(1) “Convertible Securities” means any stock or securities (other than Options) convertible into or
exercisable or exchangeable for shares of Common Stock. 
 (2) “Options” means any rights,
warrants or options to subscribe for or purchase shares of Common Stock or Convertible Securities. 
 (3)
“Common Stock Equivalents” means, collectively, Options and Convertible Securities. 
 (ii) The Company shall
not, (I) from the date hereof until the first date on or after the thirtieth (30th) day following the date the Company obtains the Shareholder Approval when there is no Equity Conditions Failure (as defined in the Series B Warrants), (the
“Trigger Date”) (x) directly or indirectly, offer, sell, grant any option to purchase, or otherwise dispose of (or announce any offer, sale, grant or any option to purchase or other disposition of) any of its or its
Subsidiaries’ equity or equity equivalent securities, including without limitation any debt, preferred stock or other instrument or security that is, at any time during its life and under any circumstances, convertible into or exchangeable or
exercisable for shares of Common Stock or Common Stock Equivalents (any such offer, sale, grant, disposition or announcement being referred to as a “Subsequent Placement”) or (y) grant any registration rights to any Person that
can be exercised prior to such date and (II) from the date hereof until the Company obtains Shareholder Approval, be party to any solicitations, negotiations or discussions with regard to the matters set forth in clause (I)(x) above. 

(iii) From the Trigger Date until the two (2) year anniversary of the Closing Date, the Company will not, directly or indirectly, effect
any Subsequent Placement unless the Company shall have first complied with this Section 4(o)(iii). 

  
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 (1) The Company shall deliver to each Buyer an irrevocable written notice to the
contact information as is set forth opposite such Buyer’s name in column (2a) of the Schedule of Buyers attached hereto (the “Offer Notice”) of any proposed or intended issuance or sale or exchange
(the “Offer”) of the securities being offered (the “Offered Securities”) in a Subsequent Placement, which Offer Notice shall (w) identify and describe the Offered Securities, (x) describe the price
and other terms upon which they are to be issued, sold or exchanged, and the number or amount of the Offered Securities to be issued, sold or exchanged, (y) identify the persons or entities (if known) to which or with which the Offered
Securities are to be offered, issued, sold or exchanged and (z) offer to issue and sell to or exchange with such Buyers at least forty percent (40%) of the Offered Securities, allocated among such Buyers (a) based on such Buyer’s
pro rata portion of the number of shares of Common Stock issuable upon exercise in full of the Series A Warrants (without regard to any limitations on exercise) purchased hereunder (the “Basic Amount”) and (b) with respect to
each Buyer that elects to purchase its Basic Amount, any additional portion of the Offered Securities attributable to the Basic Amounts of other Buyers as such Buyer shall indicate it will purchase or acquire should the other Buyers subscribe for
less than their Basic Amounts (the “Undersubscription Amount”), which process shall be repeated until the Buyers shall have an opportunity to subscribe for any remaining Undersubscription Amount. 

(2) To accept an Offer, in whole or in part, such Buyer must deliver a written notice to the Company prior to the end of the
fifth (5th) Business Day after such Buyer’s receipt of the Offer Notice (the “Offer Period”), setting forth the portion of such Buyer’s Basic Amount that such Buyer
elects to purchase and, if such Buyer shall elect to purchase all of its Basic Amount, the Undersubscription Amount, if any, that such Buyer elects to purchase (in either case, the “Notice of Acceptance”). If the Basic Amounts
subscribed for by all Buyers are less than the total of all of the Basic Amounts, then each Buyer who has set forth an Undersubscription Amount in its Notice of Acceptance shall be entitled to purchase, in addition to the Basic Amounts subscribed
for, the Undersubscription Amount it has subscribed for; provided, however, that if the Undersubscription Amounts subscribed for exceed the difference between the total of all the Basic Amounts and the Basic Amounts subscribed for (the
“Available Undersubscription Amount”), each Buyer who has subscribed for any Undersubscription Amount shall be entitled to purchase only that portion of the Available Undersubscription Amount as the Basic Amount of such Buyer bears
to the total Basic Amounts of all Buyers that have subscribed for Undersubscription Amounts, subject to rounding by the Company to the extent its deems reasonably necessary. Notwithstanding anything to the contrary contained herein, if the Company
desires to modify or amend the terms and conditions of the Offer prior to the expiration of the Offer Period, the Company may deliver to the Buyers a new Offer Notice and the Offer Period shall expire on the third (3rd) Business Day after such Buyer’s receipt of such new Offer Notice. 

(3) The Company shall have five (5) Business Days after the expiration of the Offer Period above to offer, issue,
sell or exchange all or any part of such Offered Securities as to which a Notice of Acceptance has not been given by the Buyers (the “Refused Securities”) pursuant to a definitive agreement (the “Subsequent Placement
Agreement”), but only to the offerees described in the Offer Notice (if so described therein) and only upon terms and conditions (including, without limitation, unit prices and interest rates) that are not more favorable to the acquiring
Person or Persons or  

  
 32 

 
less favorable to the Company than those set forth in the Offer Notice and (ii) to publicly announce (a) the execution of such Subsequent Placement Agreement and (b) either
(x) the consummation of the transactions contemplated by such Subsequent Placement Agreement or (y) the termination of such Subsequent Placement Agreement, which, if required to ensure that the Buyers will not be in possession of material
non-public information, shall be filed with the SEC on a Current Report on Form 8-K with such Subsequent Placement Agreement and, as so required, any documents contemplated therein filed as exhibits thereto. 

(4) In the event the Company shall propose to sell less than all the Refused Securities (any such sale to be in the manner and
on the terms specified in Section 4(o)(iii)(3) above), then each Buyer may, at its sole option and in its sole discretion, reduce the number or amount of the Offered Securities specified in its Notice of Acceptance to an amount that shall be
not less than the number or amount of the Offered Securities that such Buyer elected to purchase pursuant to Section 4(o)(iii)(2) above multiplied by a fraction, (i) the numerator of which shall be the number or amount of Offered
Securities the Company actually proposes to issue, sell or exchange (including Offered Securities to be issued or sold to Buyers pursuant to Section 4(o)(iii)(3) above prior to such reduction) and (ii) the denominator of which shall be the
original amount of the Offered Securities. In the event that any Buyer so elects to reduce the number or amount of Offered Securities specified in its Notice of Acceptance, the Company may not issue, sell or exchange more than the reduced number or
amount of the Offered Securities unless and until such securities have again been offered to the Buyers in accordance with Section 4(o)(iii)(1) above. 

(5) Upon the closing of the issuance, sale or exchange of all or less than all of the Refused Securities, the Buyers shall
acquire from the Company, and the Company shall issue to the Buyers, the number or amount of Offered Securities specified in the Notices of Acceptance, as reduced pursuant to Section 4(o)(iii)(4) above if the Buyers have so elected, upon the
terms and conditions specified in the Offer. The purchase by the Buyers of any Offered Securities is subject in all cases to the preparation, execution and delivery by the Company and the Buyers of a purchase agreement relating to such Offered
Securities in the form executed by all of the purchasers of the Refused Securities. 
 (6) Any Offered Securities not
acquired by the Buyers or other persons in accordance with Section 4(o)(iii)(3) above may not be issued, sold or exchanged until they are again offered to the Buyers under the procedures specified in this Agreement. 

(7) The Company and the Buyers agree that if any Buyer elects to participate in the Offer, (x) neither the Subsequent
Placement with respect to such Offer nor any other transaction documents related thereto (collectively, the “Subsequent Placement Documents”) shall include any term or provisions whereby any Buyer shall be required to agree to any
restrictions in trading as to any securities of the Company owned by such Buyer prior to such Subsequent Placement and (y) the Buyers shall be entitled to the same registration rights provided to the other investors in the Subsequent Placement.

  
 33 

 (8) Notwithstanding anything to the contrary in this Section 4(o) and
unless otherwise agreed to by the Buyers, the Company shall either confirm in writing to the Buyers that the transaction with respect to the Subsequent Placement has been abandoned or shall publicly disclose its intention to issue the Offered
Securities, in either case in such a manner such that the Buyers will not be in possession of material non-public information, by the tenth (10th) Business Day following delivery of the Offer
Notice. If by the tenth (10th) Business Day following delivery of the Offer Notice no public disclosure regarding a transaction with respect to the Offered Securities has been made, and no
notice regarding the abandonment of such transaction has been received by the Buyers, such transaction shall be deemed to have been abandoned and the Buyers shall not be deemed to be in possession of any material, non-public information with respect
to the Company. Should the Company decide to pursue such transaction with respect to the Offered Securities, the Company shall provide each Buyer with another Offer Notice and each Buyer will again have the right of participation set forth in this
Section 4(o)(iii). The Company shall not be permitted to deliver more than one such Offer Notice to the Buyers in any 30 day period (other than the Offer Notices contemplated by the last sentence of Section 4(o)(iii)(2) of this Agreement).

 (iv) The restrictions contained in subsections (ii) and (iii) of this Section 4(o) shall not apply in connection with the
issuance of any Excluded Securities (as defined in the Warrants). 
 (p) Shareholder Approval. The Company
shall file with the SEC and provide each shareholder of the Company with an information statement complying with the requirements of the 1934 Act and substantially in the form that has been previously reviewed and approved by the Buyers and Schulte
Roth & Zabel LLP at the expense of the Company informing such shareholders of the actions taken in accordance with the Resolutions and of the Shareholder Approval (each, as defined below). In addition to the foregoing, if required by any
governmental or regulatory agency, the Company shall provide each shareholder entitled to vote at a special or annual meeting of shareholders of the Company (the “Shareholder Meeting”), which shall be called at or prior to the
Company’s next annual meeting of shareholders, but in no event later than the date that is seventy-five (75) days after the Closing Date (the “Shareholder Meeting Deadline”), a proxy statement, in a form reasonably
acceptable to the Buyers after review by Schulte Roth & Zabel LLP at the expense of the Company, not to exceed $15,000, soliciting each such shareholder’s affirmative vote at the Shareholder Meeting for approval of resolutions (the
“Resolutions”) providing for (i) a reverse stock split of the Common Stock to cause the Company to become compliant again with the maintenance and listing requirements of the Principal Market (the “Reverse Stock
Split”, the Resolution set forth in this clause (i) is referred to herein as the “Reverse Stock Split Resolution” and the date the reverse Stock Split has been obtained, the “Reverse Stock Split Date”)
and (ii) the amendment of the Company’s Articles of Incorporation to increase the number of shares of the Company’s authorized Common Stock by no less than the amount required to reserve the Required Reserve Amount pursuant to
Section 4(k) hereof (the “Required Increase”) (the Resolution set forth in this clause (ii) is referred to herein as the “Authorized Shares Increase Resolution” and the 

  
 34 

 
date the Authorized Shares Increase Resolution has been obtained is referred to herein as the “Authorized Shares Increase Resolution Date”), in each case, in accordance with
applicable law, the provisions of the Articles of Incorporation and the rules and regulations of the Principal Market (such affirmative approvals being referred to herein collectively as the “Shareholder Approval” and the date such
approvals have been obtained, the “Shareholder Approval Date”), and the Company shall use its reasonable best efforts to solicit its shareholders’ approval of such Resolutions and to cause the Board of Directors of the Company
to recommend to the shareholders that they approve the Resolutions. The Company shall be obligated to seek to obtain the Shareholder Approval by the Shareholder Meeting Deadline. If, despite the Company’s reasonable best efforts, the
Shareholder Approval is not obtained at the Shareholder Meeting, the Company shall cause an additional Shareholder Meeting to be held each calendar quarter thereafter until Shareholder Approval is obtained. Each time the Company seeks the approval
of its shareholders for the Shareholder Approval, the Company’s Board of Directors shall recommend to the Company’s shareholders that the shareholders vote in favor of the Shareholder Approval at the Shareholders Meeting and take all
reasonable action to solicit the approval of the shareholders for the Shareholder Approval. Each time the Company seeks the approval of its shareholders for the Shareholder Approval, the Company’s Board of Directors shall recommend to the
Company’s shareholders that the shareholders vote in favor of the Shareholder Approval at the Shareholders Meeting and take all reasonable action to solicit the approval of the shareholders for the Shareholder Approval. No later than five
(5) Business Days following the Authorized Shares Increase Resolution Date, the Company shall file with the Secretary of State of Colorado a certificate of amendment to the Company’s Articles of Incorporation to effect the Authorized
Shares Increase Resolution such that the number of authorized shares of the Company’s Common Stock is increased by no less than the Required Increase, which certificate of amendment shall provide that it shall become immediately effective upon
filing (the occurrence of such filing and the amendment filing, the “Authorized Shares Increase Amendment”). 

(q) Warrant Share Characteristics. If Warrant Shares are issued upon exercise of the Warrants in a Cashless Exercise (as
defined in the Warrants), the Company acknowledges and agrees that in accordance with Section 3(a)(9) of the 1933 Act, the Warrant Shares shall take on the registered characteristics of the Warrants with respect to which such Warrant Shares are
being issued, and the holding period of such Warrants may be tacked on to the holding period of the Warrant Shares. The Company agrees not to take any position contrary to this Section 4(q) for purposes of Section 3(a)(9) or Rule 144
of the 1933 Act. 
 (r) Reporting Status. Until the date on which the Buyers shall have sold all of the Warrant Shares
and none of the Warrants are outstanding (the “Reporting Period”), the Company shall timely file all reports required to be filed with the SEC pursuant to the 1934 Act, provided, that for the purposes of this Agreement, a
report shall not be considered untimely solely because it is filed after such report’s due date, so long as it is filed within the time periods set forth in Rule 12b-25 of the 1934 Act (“Rule 12b-25”). Further, until such date,
the Company shall not terminate its status as an issuer required to file reports under the 1934 Act even if the 1934 Act or the rules and regulations thereunder would no longer require or otherwise permit such termination, and the Company shall take
all commercially reasonable actions necessary to maintain its eligibility to issue Securities to the Buyers on Form S-3. 

  
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 (s) Public Information. At any time during the period commencing
from the six (6) month anniversary of the Closing Date and ending at such time that all of the Securities, if a registration statement is not available for the resale of all of the Securities, may be sold without restriction or limitation
pursuant to Rule 144 and without the requirement to be in compliance with Rule 144(c)(1), if the Company shall (i) fail for any reason to satisfy the requirements of Rule 144(c)(1), including, without limitation, the failure to satisfy the
current public information requirement under Rule 144(c) or (ii) if the Company has ever been an issuer described in Rule 144(i)(1)(i) or becomes such an issuer in the future, and the Company shall fail to satisfy any condition set forth in
Rule 144(i)(2) (a “Public Information Failure”) then, as partial relief for the damages to any holder of Securities by reason of any such delay in or reduction of its ability to sell the Securities (which remedy shall not be
exclusive of any other remedies available at law or in equity), the Company shall pay to each such holder an amount in cash equal to one percent (1.0%) of the sum of (x) the aggregate Purchase Price of such Investor’s Common Shares
and Series E Warrants and (y) the Aggregate Exercise Price (as defined in the Series B Warrants) paid by such Investor for the exercise of the Series B Warrants of such Investor on the day of a Public Information Failure and on every thirtieth
day (pro-rated for periods totaling less than thirty days) thereafter until the earlier of (i) the date such Public Information Failure is cured and (ii) such time that such public information is no longer required pursuant to Rule 144.
The payments to which a holder shall be entitled pursuant to this Section 4(s) are referred to herein as “Public Information Failure Payments.” Public Information Failure Payments shall be paid on the earlier of (I) the
last day of the calendar month during which such Public Information Failure Payments are incurred and (II) the third Business Day after the event or failure giving rise to the Public Information Failure Payments is cured. In the event the Company
fails to make Public Information Failure Payments in a timely manner, such Public Information Failure Payments shall bear interest at the rate of 1.5% per month (prorated for partial months) until paid in full. Notwithstanding the foregoing, no
payment shall be required if the Company fails to satisfy the current public information requirement set forth in Rule 144(c) during the grace period provided by Rule 12b-25, so long as the Company makes the applicable filing within the time periods
set forth in Rule 12b-25.  
 (t) Mandatory Exercise. Upon delivery by the Company of a Mandatory Exercise
Notice (as defined in the Series B Warrants), each Buyer shall deliver the Aggregate Exercise Price (as defined in the Series B Warrants) on the applicable Mandatory Exercise Date (as defined in the Series B Warrants) with respect to the Mandatory
Exercise Amount (as defined in the Series B Warrants) of the Series B Warrants subject to such Mandatory Exercise, so long as the Mandatory Exercise (as defined in the Series B Warrants) is effected pursuant to the terms and conditions of the
Mandatory Exercise set forth in Section 1(h) of the Series B Warrants, including, without limitation the satisfaction of the Equity Conditions (as defined in the Series B Warrants). 

(u) Closing Documents. On or prior to twenty-five (25) calendar days after the Closing Date, the Company agrees to
deliver, or cause to be delivered, to each Buyer and Schulte Roth & Zabel LLP a complete closing set of the executed Transaction Documents, Securities and any other documents required to be delivered to any party pursuant to Section 7
hereof or otherwise. 
 (v) Series B & Series E Warrants. The Company hereby agrees that a Buyer may at any time
after the date hereof submit an Exercise Notice (as defined in each of the Series B Warrants and Series E Warrants) for the exercise of the Series B Warrants and Series E Warrants. The Series B Warrant Shares and Series E Warrant Shares shall be
required to be delivered by the Company to such Buyer on or prior to the applicable Share Delivery Date (as defined in each of the Series B Warrants and Series E Warrants, as applicable), subject to the Closing Date occurring on or prior to such
date. 

  
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 5. REGISTER; TRANSFER AGENT INSTRUCTIONS. 

(a) Register. The Company shall maintain at its principal executive offices (or such other office or agency of the
Company as it may designate by notice to each holder of Securities), a register for the Warrants in which the Company shall record the name and address of the Person in whose name the Warrants have been issued (including the name and address of each
transferee) and the number of Warrant Shares issuable upon exercise of the Warrants held by such Person. The Company shall keep the register open and available at all times during business hours for inspection of any Buyer or its legal
representatives. 
 (b) Transfer Agent Instructions. The Company shall issue irrevocable instructions to its transfer
agent, and any subsequent transfer agent, in a form acceptable to the Buyer (the “Irrevocable Transfer Agent Instructions”) to issue certificates or credit shares to the applicable balance accounts at DTC, registered in the name of
each Buyer or its respective nominee(s), for the Warrant Shares issued pursuant to the terms of the Transaction Documents in such amounts as specified from time to time by each Buyer to the Company upon exercise of the Warrants. The Company warrants
that no instruction other than the Irrevocable Transfer Agent Instructions referred to in this Section 5(b) will be given by the Company to its transfer agent, and any subsequent transfer agent, and that the Securities shall otherwise be freely
transferable on the books and records of the Company as and to the extent provided in this Agreement and the other Transaction Documents. The Company acknowledges that a breach by it of its obligations hereunder will cause irreparable harm to each
Buyer. Accordingly, the Company acknowledges that the remedy at law for a breach of its obligations under this Section 5 will be inadequate and agrees, in the event of a breach or threatened breach by the Company of the provisions of this
Section 5, that each Buyer shall be entitled, in addition to all other available remedies, to an order and/or injunction restraining any breach and requiring immediate issuance and transfer, without the necessity of showing economic loss and
without any bond or other security being required. 
 6. CONDITIONS TO THE COMPANY’S OBLIGATION TO SELL. 

The obligation of the Company hereunder to issue and sell the Common Shares and the related Warrants to each Buyer at the Closing is subject
to the satisfaction, at or before the Closing Date, of each of the following conditions, provided that these conditions are for the Company’s sole benefit and may be waived by the Company at any time in its sole discretion by providing each
Buyer with prior written notice thereof: 
 (a) Such Buyer shall have executed this Agreement and each other Transaction
Document to be executed by such Buyer, and delivered the same to the Company. 
 (b) Such Buyer shall have delivered its
Purchase Price to the Company (less, in the case of the Lead Investor, the amounts withheld pursuant to Section 4(f)) for the Common Shares and the related Series A Warrants, Series B Warrants, Series C Warrants, Series D Warrants and Series E
Warrants being purchased by such Buyer at the Closing by wire transfer of immediately available funds pursuant to an escrow account established by the Company and the Placement Agent with Signature Bank (or such other bank mutually agreed to by the
Company and the Agent), as escrow agent, in accordance with the Company’s written wire instructions, which funds shall be subject to the terms and conditions of such escrow. 

  
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 (c) The representations and warranties of such Buyer shall be true and correct in
all material respects (except for those representations and warranties that are qualified by materiality or Material Adverse Effect, which shall be true and correct in all respects) as of the date when made and as of the Closing Date as though made
at that time (except for representations and warranties that speak as of a specific date, which shall be true and correct in all material respects (except for those representations and warranties that are qualified by materiality or Material Adverse
Effect, which shall be true and correct in all respects) as of such specified date), and such Buyer shall have performed, satisfied and complied in all material respects with the covenants, agreements and conditions required by this Agreement to be
performed, satisfied or complied with by such Buyer at or prior to the Closing Date. 
 (d) No litigation, statute, rule,
regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority over the
matters contemplated hereby which prohibits the consummation of any of the transactions contemplated by this Agreement. 
 7. CONDITIONS
TO EACH BUYER’S OBLIGATION TO PURCHASE. 
 The obligation of each Buyer hereunder to purchase the Common Shares and the related
Warrants at the Closing is subject to the satisfaction, at or before the Closing Date, of each of the following conditions, provided that these conditions are for each Buyer’s sole benefit and may be waived by such Buyer at any time in its sole
discretion by providing the Company with prior written notice thereof: 
 (a) The Company shall have duly executed and
delivered to such Buyer, each of the following to which it is a party: (i) each of the Transaction Documents, (ii) the Common Shares (allocated in such amounts as such Buyer shall request), being purchased by such Buyer at the Closing
pursuant to this Agreement, (iii) the Series A Warrants (allocated in such amounts as such Buyer shall request) being purchased by such Buyer at the Closing pursuant to this Agreement, (iv) the Series B Warrants (allocated in such amounts
as such Buyer shall request) being purchased by such Buyer at the Closing pursuant to this Agreement, (v) the Series C Warrants (allocated in such amounts as such Buyer shall request) being purchased by such Buyer at the Closing pursuant to
this Agreement, (vi) the Series D Warrants (allocated in such amounts as such Buyer shall request) being purchased by such Buyer at the Closing pursuant to this Agreement and (vii) the Series E Warrants (allocated in such amounts as such
Buyer shall request) being purchased by such Buyer at the Closing pursuant to this Agreement. 
 (b) Such Buyer shall have
received the opinions of Brownstein Hyatt Farber Schreck, LLP, the Company’s outside counsel, dated as of the Closing Date, in substantially the form of Exhibit I attached hereto. 

(c) The Company shall have delivered to such Buyer a copy of the Irrevocable Transfer Agent Instructions, in the form
acceptable to such Buyer, which instructions shall have been delivered to and acknowledged in writing by the Company’s transfer agent. 

  
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 (d) The Company shall have delivered to such Buyer a certificate evidencing the
formation and good standing of the Company and each of its Significant Subsidiaries in such entity’s jurisdiction of formation issued by the Secretary of State (or comparable office) of such jurisdiction, or a bring down of such good standing
from Corporation Service Company, as of a date within ten (10) days before the Closing Date. 
 (e) The Company shall
have delivered to such Buyer a certificate evidencing the Company’s qualification as a foreign corporation and good standing issued by the Secretary of State (or comparable office) of each jurisdiction in which the Company conducts business, or
a bring down of such good standing from Corporation Service Company, as of a date within ten (10) days of the Closing Date. 

(f) The Company shall have delivered to such Buyer a certified copy of the Articles of Incorporation of the Company and each of
its Subsidiaries as certified by the Secretary of State (or comparable office) of the jurisdiction of formation of the Company and each of its Subsidiaries within ten (10) days of the Closing Date. 

(g) The Company shall have delivered to such Buyer a certificate, executed by the Secretary of the Company and dated as of the
Closing Date, as to (i) the resolutions consistent with Section 3(d) as adopted by the Company’s and each of its Subsidiaries’ Board of Directors in a form reasonably acceptable to such Buyer, (ii) the Articles of
Incorporation of the Company and each of its Subsidiaries and (iii) the Bylaws of the Company and each of its Subsidiaries, each as in effect at the Closing, in the form attached hereto as Exhibit J. 

(h) The representations and warranties of the Company shall be true and correct in all material respects (except for those
representations and warranties that are qualified by materiality or Material Adverse Effect, which shall be true and correct in all respects) as of the date when made and as of the Closing Date as though made at that time (except for representations
and warranties that speak as of a specific date, which shall be true and correct in all material respects (except for those representations and warranties that are qualified by materiality or Material Adverse Effect, which shall be true and correct
in all respects) as of such specified date) and the Company shall have performed, satisfied and complied in all material respects with the covenants, agreements and conditions required by the Transaction Documents to be performed, satisfied or
complied with by the Company at or prior to the Closing Date. Such Buyer shall have received a certificate, executed by the Chief Executive Officer of the Company, dated as of the Closing Date, to the foregoing effect and as to such other matters as
may be reasonably requested by such Buyer in the form attached hereto as Exhibit K. 
 (i) The Company shall have
delivered to such Buyer a letter from the Company’s transfer agent certifying the number of shares of Common Stock outstanding as of a date within five (5) days before the Closing Date. 

(j) The Common Stock (I) shall be designated for quotation or listed on the Principal Market and (II) shall not have been
suspended, as of the Closing Date, by the SEC or the Principal Market from trading on the Principal Market, nor shall suspension by the SEC or the Principal Market have been threatened, as of the Closing Date, either (A) in writing by the SEC
or the Principal Market or (B) by falling below the minimum listing maintenance requirements of the Principal Market, other than as disclosed in the Registration Statement and Prospectus Supplement. 

  
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 (k) The Company shall have obtained all governmental, regulatory or third party
consents and approvals, if any, necessary for the sale of the Securities and the transactions contemplated by the Transaction Documents and all payments thereunder. 

(l) The Registration Statement shall be effective and available for the issuance and sale of the Securities hereunder and the
Company shall have delivered to such Buyer the Prospectus and the Prospectus Supplement as required thereunder. 
 (m) No
litigation, statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization
having authority over the matters contemplated hereby which prohibits the consummation of any of the transactions contemplated by this Agreement. 

(n) The Company shall have delivered to each Buyer a Lock-Up Agreement in the form attached hereto as Exhibit F-2
executed and delivered by each of the Persons listed on Exhibit F-1 hereto. 
 (o) The Voting Agreement shall have
been executed and delivered to such Buyer by the Company and the Principal Shareholders. 
 (p) The Company shall have
delivered to such Buyer such other documents relating to the transactions contemplated by this Agreement as such Buyer or its counsel may reasonably request. 

8. TERMINATION. In the event that the Closing shall not have occurred with respect to a Buyer on or before five (5) Business Days
from the date hereof due to the Company’s or such Buyer’s failure to satisfy the conditions set forth in Sections 6 and 7 above (and the nonbreaching party’s failure to waive such unsatisfied condition(s)), the nonbreaching party
shall have the option to terminate this Agreement with respect to such breaching party at the close of business on such date by delivering a written notice to that effect to each other party to this Agreement and without liability of any party to
any other party; provided, however, that if this Agreement is terminated pursuant to this Section 8, the Company shall remain obligated to reimburse the Lead Investor or its designee(s), as applicable, for the expenses described
in Section 4(f) above. 
 9. MISCELLANEOUS. 

(a) Governing Law; Jurisdiction; Jury Trial. All questions concerning the construction, validity, enforcement and
interpretation of this Agreement shall be governed by the internal laws of the State of New York, without giving effect to any choice of law or conflict of law provision or rule (whether of the State of New York or any other jurisdictions) that
would cause the application of the laws of any jurisdictions other than the State of New York. Each party hereby irrevocably submits to the exclusive jurisdiction of the state and federal courts sitting in The City of New York, Borough of Manhattan,
for the adjudication of any 

  
 40 

 
dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein, and hereby irrevocably waives, and agrees not to assert in any suit, action or
proceeding, any claim that it is not personally subject to the jurisdiction of any such court, that such suit, action or proceeding is brought in an inconvenient forum or that the venue of such suit, action or proceeding is improper. Each party
hereby irrevocably waives personal service of process and consents to process being served in any such suit, action or proceeding by mailing a copy thereof to such party at the address for such notices to it under this Agreement and agrees that such
service shall constitute good and sufficient service of process and notice thereof. Nothing contained herein shall be deemed to limit in any way any right to serve process in any manner permitted by law. EACH PARTY HEREBY IRREVOCABLY WAIVES ANY
RIGHT IT MAY HAVE, AND AGREES NOT TO REQUEST, A JURY TRIAL FOR THE ADJUDICATION OF ANY DISPUTE HEREUNDER OR IN CONNECTION WITH OR ARISING OUT OF THIS AGREEMENT OR ANY TRANSACTION CONTEMPLATED HEREBY. 

(b) Counterparts. This Agreement may be executed in two or more identical counterparts, all of which shall be considered
one and the same agreement and shall become effective when counterparts have been signed by each party and delivered to the other party; provided that a facsimile signature shall be considered due execution and shall be binding upon the signatory
thereto with the same force and effect as if the signature were an original, not a facsimile signature. 
 (c)
Headings. The headings of this Agreement are for convenience of reference and shall not form part of, or affect the interpretation of, this Agreement. 

(d) Severability. If any provision of this Agreement is prohibited by law or otherwise determined to be invalid or
unenforceable by a court of competent jurisdiction, the provision that would otherwise be prohibited, invalid or unenforceable shall be deemed amended to apply to the broadest extent that it would be valid and enforceable, and the invalidity or
unenforceability of such provision shall not affect the validity of the remaining provisions of this Agreement so long as this Agreement as so modified continues to express, without material change, the original intentions of the parties as to the
subject matter hereof and the prohibited nature, invalidity or unenforceability of the provision(s) in question does not substantially impair the respective expectations or reciprocal obligations of the parties or the practical realization of the
benefits that would otherwise be conferred upon the parties. The parties will endeavor in good faith negotiations to replace the prohibited, invalid or unenforceable provision(s) with a valid provision(s), the effect of which comes as close as
possible to that of the prohibited, invalid or unenforceable provision(s). 
 (e) Entire Agreement; Amendments. This
Agreement and the other Transaction Documents supersede all other prior oral or written agreements between the Buyers, the Company, their affiliates and Persons acting on their behalf with respect to the matters discussed herein, and this Agreement,
the other Transaction Documents and the instruments referenced herein and therein contain the entire understanding of the parties with respect to the matters covered herein and therein and, except as specifically set forth herein or therein, neither
the Company nor any Buyer makes any representation, warranty, covenant or undertaking with respect to such matters. Provisions of this Agreement may be amended and the observance 

  
 41 

 
thereof may be waived (either generally or in a particular instance and either retroactively or prospectively), only with the written consent of the Company and the holders who were issued on the
Closing Date a majority of the Common Shares and shall include the Lead Investor (the “Required Holders”). Any amendment or waiver effected in accordance with, and any amendment to this Agreement made in conformity with the
provisions of this Section 9(e) shall be binding on each Buyer and holders of Securities of the Company as applicable. No such amendment shall be effective to the extent that it applies to less than all of the Buyers of Securities. No
consideration shall be offered or paid to any Person to amend or consent to a waiver or modification of any provision of any of the Transaction Documents unless the same consideration (other than the reimbursement of legal fees) also is offered to
all of the parties to the Transaction Documents, the holders of Common Shares and holders of the Warrants. The Company has not, directly or indirectly, made any agreements with any Buyers relating to the terms or conditions of the transactions
contemplated by the Transaction Documents except as set forth in the Transaction Documents. Without limiting the foregoing, the Company confirms that, except as set forth in this Agreement, no Buyer has made any commitment or promise or has any
other obligation to provide any financing to the Company or otherwise. 
 (f) Notices. Any notices, consents, waivers
or other communications required or permitted to be given under the terms of this Agreement must be in writing and will be deemed to have been delivered: (i) upon receipt, when delivered personally; (ii) upon receipt, when sent by
facsimile (provided confirmation of transmission is mechanically or electronically generated and kept on file by the sending party) or by electronic mail; or (iii) one Business Day after deposit with an overnight courier service, in each case
properly addressed to the party to receive the same. The addresses, facsimile numbers and e-mail address for such communications shall be: 

If to the Company: 

Real Goods Solar, Inc. 

833 West South Boulder Road, 

Louisville, CO 80027 

Telephone:    (303) 222-8541 

Facsimile:     1-877-835-4834 

E-mail:          Dennis.Lacey@rgsenergy.com 

Attention:      Dennis Lacey 

with a copy (for informational purposes only) to: 

Brownstein Hyatt Farber Schreck, LLP 

410 Seventeenth Street, Suite 2200 

Denver, CO 80202 

Telephone:    (303) 223-1100 

Facsimile:     (303) 223-1111 

E-mail:          KMacdonald@BHFS.com 

Attention:      Kristin M. Macdonald 

  
 42 

 If to the Transfer Agent: 

Computershare Trust Company, N.A. 

P.O. Box 30170 

College Station, TX 77842-3170 

Telephone:  (800) 962-4284 

Facsimile:   

Attention:  Agent 

If to a Buyer, to its address, facsimile number and e-mail address set forth on the Schedule of Buyers, with copies to such Buyer’s representatives as
set forth on the Schedule of Buyers, 
 with a copy (for informational purposes only) to: 

Schulte Roth & Zabel LLP 

919 Third Avenue 

New York, New York 10022 

Telephone:    (212) 756-2000 

Facsimile:     (212) 593-5955 

Attention:      Eleazer N. Klein, Esq. 

E-mail:          eleazer.klein@srz.com 

or to such other address, facsimile number and/or email-address and/or to the attention of such other Person as the recipient party has
specified by written notice given to each other party five (5) days prior to the effectiveness of such change. Written confirmation of receipt (A) given by the recipient of such notice, consent, waiver or other communication,
(B) mechanically or electronically generated by the sender’s facsimile machine or e-mail containing the time, date, recipient facsimile number and an image of the first page of such transmission or (C) provided by an overnight courier
service shall be rebuttable evidence of personal service, receipt by facsimile or receipt from an overnight courier service in accordance with clause (i), (ii) or (iii) above, respectively. 

(g) Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the parties and their
respective successors and assigns, including any purchasers of the Warrants. The Company shall not assign this Agreement or any rights or obligations hereunder without the prior written consent of the Required Holders, including by way of a
Fundamental Transaction (unless the Company is in compliance with the applicable provisions governing Fundamental Transactions set forth in the Warrants). A Buyer may assign some or all of its rights hereunder without the consent of the Company, in
which event such assignee shall be deemed to be a Buyer hereunder with respect to such assigned rights 
 (h) No Third
Party Beneficiaries. This Agreement is intended for the benefit of the parties hereto and their respective permitted successors and assigns, and is not for the benefit of, nor may any provision hereof be enforced by, any other Person, except
that each Indemnitee shall have the right to enforce the obligations of the Company with respect to Section 9(k). 

  
 43 

 (i) Survival. Unless this Agreement is terminated under Section 8,
the representations and warranties of the Company and the Buyers contained in Sections 2 and 3, and the agreements and covenants set forth in Sections 4, 5 and 9 shall survive the Closing. Each Buyer shall be responsible only for its own
representations, warranties, agreements and covenants hereunder. 
 (j) Further Assurances. Each party shall do and
perform, or cause to be done and performed, all such further acts and things, and shall execute and deliver all such other agreements, certificates, instruments and documents, as any other party may reasonably request in order to carry out the
intent and accomplish the purposes of this Agreement and the consummation of the transactions contemplated hereby. 
 (k)
Indemnification. (i) In consideration of each Buyer’s execution and delivery of the Transaction Documents and acquiring the Securities thereunder and in addition to all of the Company’s other obligations under the Transaction
Documents, the Company shall defend, protect, indemnify and hold harmless each Buyer and each other holder of the Securities and all of their shareholders, partners, members, officers, directors, employees and direct or indirect investors and any of
the foregoing Persons’ agents or other representatives (including, without limitation, those retained in connection with the transactions contemplated by this Agreement) (collectively, the “Indemnitees”) from and against any
and all actions, causes of action, suits, claims, losses, costs, penalties, fees, liabilities and damages, and expenses in connection therewith (irrespective of whether any such Indemnitee is a party to the action for which indemnification hereunder
is sought), and including reasonable attorneys’ fees and disbursements (the “Indemnified Liabilities”), incurred by any Indemnitee as a result of, or arising out of, or relating to (a) any misrepresentation or breach of
any representation or warranty made by the Company in the Transaction Documents or any other certificate, instrument or document contemplated hereby or thereby, (b) any breach of any covenant, agreement or obligation of the Company contained in
the Transaction Documents or any other certificate, instrument or document contemplated hereby or thereby or (c) any cause of action, suit or claim brought or made against such Indemnitee by a third party (including for these purposes a
derivative action brought on behalf of the Company) and arising out of or resulting from (i) the execution, delivery, performance or enforcement of the Transaction Documents or any other certificate, instrument or document contemplated hereby
or thereby, (ii) any transaction financed or to be financed in whole or in part, directly or indirectly, with the proceeds of the issuance of the Securities, (iii) any disclosure made by such Buyer pursuant to Section 4(h) or
(iv) the status of such Buyer or holder of the Securities as an investor in the Company, pursuant to the transactions contemplated by the Transaction Documents; provided, however, that the Company shall not shall be liable in any
such case solely to the extent that any such loss, claim, damage, expense or liability arises out of or is based upon an untrue statement or alleged untrue statement in, or omission or alleged omission from any Preliminary Prospectus, any
Registration Statement or the Prospectus, or any Issuer Free Writing Prospectus made in reliance upon and in conformity with written information furnished to the Company by or on behalf of any Buyer specifically for use therein. To the extent that
the foregoing undertaking by the Company may be unenforceable for any reason, the Company shall make the maximum contribution to the payment and satisfaction of each of the Indemnified Liabilities that is permissible under applicable law. 

  
 44 

 (ii) Promptly after receipt by an Indemnitee under this Section 9(k) of
notice of the commencement of any action or proceeding (including any governmental action or proceeding) involving an Indemnified Liability, such Indemnitee shall, if a claim for indemnification in respect thereof is to be made against any
indemnifying party under this Section 9(k), deliver to the indemnifying party a written notice of the commencement thereof, and the indemnifying party shall have the right to participate in, and, to the extent the indemnifying party so desires,
jointly with any other indemnifying party similarly noticed, to assume control of the defense thereof with counsel mutually satisfactory to the indemnifying party and the Indemnitee; provided, however, that an Indemnitee shall have the
right to retain its own counsel with the fees and expenses of not more than one counsel for such Indemnitee to be paid by the indemnifying party, if, in the reasonable opinion of the Indemnitee, the representation by such counsel of the Indemnitee
and the indemnifying party would be inappropriate due to actual or potential differing interests between such Indemnitee and any other party represented by such counsel in such proceeding. Legal counsel referred to in the immediately preceding
sentence shall be selected by the Investors holding at least a majority of the Registrable Securities. The Indemnitee shall cooperate fully with the indemnifying party in connection with any negotiation or defense of any such action or Indemnified
Liabilities by the indemnifying party and shall furnish to the indemnifying party all information reasonably available to the Indemnitee that relates to such action or Indemnified Liabilities. The indemnifying party shall keep the Indemnitee fully
apprised at all times as to the status of the defense or any settlement negotiations with respect thereto. No indemnifying party shall be liable for any settlement of any action, claim or proceeding effected without its prior written consent,
provided, however, that the indemnifying party shall not unreasonably withhold, delay or condition its consent. No indemnifying party shall, without the prior written consent of the Indemnitee, consent to entry of any judgment or enter
into any settlement or other compromise which does not include as an unconditional term thereof the giving by the claimant or plaintiff to such Indemnitee of a release from all liability in respect to such Indemnified Liabilities or litigation.
Following indemnification as provided for hereunder, the indemnifying party shall be subrogated to all rights of the Indemnitee with respect to all third parties, firms or corporations relating to the matter for which indemnification has been made.
The failure to deliver written notice to the indemnifying party within a reasonable time of the commencement of any such action shall not relieve such indemnifying party of any liability to the Indemnitee under this Section 9(k), except to the
extent that the indemnifying party is prejudiced in its ability to defend such action. 
 (iii) The indemnification required
by this Section 9(k) shall be made by periodic payments of the amount thereof during the course of the investigation or defense, as and when bills are received or Indemnified Liabilities are incurred. 

(iv) The indemnity agreements contained herein shall be in addition to (x) any cause of action or similar right of the
Indemnitee against the indemnifying party or others, and (y) any liabilities the indemnifying party may be subject to pursuant to the law. 

  
 45 

 (v) Notwithstanding the forgoing, under no circumstances shall the Company or
its Subsidiaries, or their respective directors, officers, employees, consultants, agents or representatives, be responsible or liable for, and no Indemnitee shall be entitled to seek any consequential damages. 

(l) No Strict Construction. The language used in this Agreement will be deemed to be the language chosen by the parties
to express their mutual intent, and no rules of strict construction will be applied against any party. 
 (m)
Remedies. Each Buyer and each holder of the Securities shall have all rights and remedies set forth in the Transaction Documents and all rights and remedies which such holders have been granted at any time under any other agreement or
contract and all of the rights which such holders have under any law. Any Person having any rights under any provision of this Agreement shall be entitled to enforce such rights specifically (without posting a bond or other security), to recover
damages by reason of any breach of any provision of this Agreement and to exercise all other rights granted by law. Furthermore, the Company recognizes that in the event that it fails to perform, observe, or discharge any or all of its obligations
under the Transaction Documents, any remedy at law may prove to be inadequate relief to the Buyers. The Company therefore agrees that the Buyers shall be entitled to seek temporary and permanent injunctive relief in any such case without the
necessity of proving actual damages and without posting a bond or other security. 
 (n) Rescission and Withdrawal
Right. Notwithstanding anything to the contrary contained in (and without limiting any similar provisions of) the Transaction Documents, whenever any Buyer exercises a right, election, demand or option under a Transaction Document and the
Company does not timely perform its related obligations within the periods therein provided, then such Buyer may rescind or withdraw, in its sole discretion from time to time upon written notice to the Company, any relevant notice, demand or
election in whole or in part without prejudice to its future actions and rights. 
 (o) Payment Set Aside. To the
extent that the Company makes a payment or payments to the Buyers hereunder or pursuant to any of the other Transaction Documents or the Buyers enforce or exercise their rights hereunder or thereunder, and such payment or payments or the proceeds of
such enforcement or exercise or any part thereof are subsequently invalidated, declared to be fraudulent or preferential, set aside, recovered from, disgorged by or are required to be refunded, repaid or otherwise restored to the Company, a trustee,
receiver or any other Person under any law (including, without limitation, any bankruptcy law, foreign, state or federal law, common law or equitable cause of action), then to the extent of any such restoration the obligation or part thereof
originally intended to be satisfied shall be revived and continued in full force and effect as if such payment had not been made or such enforcement or setoff had not occurred. 

(p) Independent Nature of Buyers’ Obligations and Rights. The obligations of each Buyer under any Transaction
Document are several and not joint with the obligations of any other Buyer, and no Buyer shall be responsible in any way for the performance of the obligations of any other Buyer under any Transaction Document. Nothing contained herein or in any
other Transaction Document, and no action taken by any Buyer pursuant hereto or 

  
 46 

 
thereto, shall be deemed to constitute the Buyers as, and the Company acknowledges that the Buyers do not so constitute, a partnership, an association, a joint venture or any other kind of
entity, or create a presumption that the Buyers are in any way acting in concert or as a group, and the Company shall not assert any such claim with respect to such obligations or the transactions contemplated by the Transaction Documents and the
Company acknowledges, and each Buyer confirms, that the Buyers are not acting in concert or as a group with respect to such obligations or the transactions contemplated by the Transaction Documents. The Company acknowledges that it has independently
participated in the negotiation of the transaction contemplated hereby with the advice of its own counsel and advisors. Each Buyer shall be entitled to independently protect and enforce its rights, including, without limitation, the rights arising
out of this Agreement or out of any other Transaction Documents, and it shall not be necessary for any other Buyer to be joined as an additional party in any proceeding for such purpose. 

[Signature Page Follows] 

  
 47 

 IN WITNESS WHEREOF, each Buyer and the Company have caused their respective signature page
to this Securities Purchase Agreement to be duly executed as of the date first written above. 
  

			
	 COMPANY:
  

REAL GOODS SOLAR, INC.

		
	By:		  

			 Name: Dennis Lacey
 Title:   Chief
Executive Officer

 [Signature Page to Securities 

Purchase Agreement] 

 IN WITNESS WHEREOF, each Buyer and the Company have caused their respective signature page
to this Securities Purchase Agreement to be duly executed as of the date first written above. 
  

			
	BUYERS:
	
	[Lead Investor]
		
	By:		[                                      
                      ]
		
	By:		  

			Name:
			Title:

  
 49 

 IN WITNESS WHEREOF, each Buyer and the Company have caused their respective signature page
to this Securities Purchase Agreement to be duly executed as of the date first written above. 
  

			
	BUYERS:
	
	[OTHER BUYER]
		
	By:		  

			Name:
			Title:

 [Signature Page to Securities 

Purchase Agreement] 

 SCHEDULE OF BUYERS 

 

																							
	(1)	 	(2)	 	(2a)	 	(3)	 	 	(4)(a)	 	 	(4)(b)	 	 	(5)	 	 	(6)
	 Buyer
	 	Address, E-mail,
Facsimile Number and
Telephone Number	 	Email and Telephone
Number for Offer Notices	 	Number of
Common
Shares	 	 	Number of
Series A
Warrant
Shares	 	 	Number of
Series E
Warrant
Shares	 	 	Purchase
Price	 	 	Legal Representative’s Address and
Facsimile Number
	 Lead Investor
	 		 		 	 	[    	] 	 	 	[    	] 	 	 	[    	] 	 	$	[    	] 	 	
	 [Other Buyers]
	 		 		 				 				 				 				 	

 EXHIBITS 
  

			
	Exhibit A		Form of Series A/B/C/D/E Warrant
	Exhibit B		 [Reserved.]

	Exhibit C		 [Reserved.] 

	Exhibit D		 [Reserved.] 

	Exhibit E		 [Reserved.] 

	Exhibit F-1		Parties to Lock-Up Agreement
	Exhibit F-2		Form of Lock-Up Agreement
	Exhibit G		Form of Voting Agreement
	Exhibit H		 [Reserved.]

	Exhibit I		Form of Opinion of Company’s Outside Counsel
	Exhibit J		Form of Secretary’s Certificate
	Exhibit K		Form of Officers Certificate

 SCHEDULES 
  

			
	Schedule I		List of General Use Free Writing Prospectus
	Schedule 3(c)		Significant Subsidiaries
	Schedule 3(f)		Equity Capitalization
	Schedule 3(ff)		Transactions with Affiliates
	Schedule 3(hh)		Listing; 1934 Act Registration

 EXHIBIT A 

Form of Series A/B/C/D/E Warrant 

[Filed as Exhibit 4.1 to this Current Report on Form 8-K] 

 EXHIBIT F-1 

Parties to Lock-Up Agreement 
 David L.
Belluck 
 Pavel Bousaka 
 Ian Bowles 

Steven B. Kauffman 
 John Schaeffer 

Robert L. Scott 
 Dennis Lacey 

Alan Fine 

 EXHIBIT F-2 

Form of Lock-Up Agreement 

[Filed as Exhibit 10.2 to this Current Report on Form 8-K] 

 EXHIBIT G 

Form of Voting Agreement 

[Filed as Exhibit 10.3 to this Current Report on Form 8-K] 

 EXHIBIT I 

Form of Opinion of Company’s Outside Counsel 

 EXHIBIT J 

Form of Secretary’s Certificate 

 EXHIBIT K 

Form of Officer’s Certificate 

 SCHEDULE I 

List of General Use Free Writing Prospectus 

None 

 SCHEDULE 3(c) 

Significant Subsidiaries 
 Elemental
Energy, LLC 
 Real Goods Energy Tech, Inc. 
 RGS Financing,
Inc. 
 Mercury Energy, Inc. 
 Real Goods Solar, Inc. –
Mercury Solar 
 Alteris Renewables, Inc. 
 Sunetric Management,
LLC 

 SCHEDULE 3(f)(ii) 

Equity Capitalization 
 Warrant to issued
203,704 shares of Class A Common Stock issued to Silicon Valley Bank dated November 19, 2014. 

 SCHEDULE 3(ff) 

Transactions with Affiliates 
 Columbia
Acorn Fund and Columbia Wanger Asset Management, LLC are affiliated with Columbia Management Investment Distributors, Inc., member FINRA. 

 SCHEDULE 3(hh) 

Listing; 1934 Act Registration 
 On
December 15, 2014, Real Goods Solar, Inc. (the “Company”) received a letter from The Nasdaq Stock Market (“NASDAQ”) notifying the Company that for the last 30 consecutive business days the bid price of the Company’s
Class A common stock had closed below the minimum $1.00 per share requirement for continued inclusion on NASDAQ based on Listing Rule 5550(a)(2), and describing a timetable for bringing the Company into compliance with that rule. The
Company disclosed this notification on a Form 8-K filed on December 19, 2014. 
 In addition the Company may not be able to continue to meet the
Shareholder Equity listing standards for the Nasdaq Capital Market and may in the future receive a delisting notification with respect to a failure to meet that standard.EX-10.2

 Exhibit 10.2 

REAL GOODS SOLAR, INC. 

Form of Lock-Up Agreement 

February    , 2015 
 Real
Goods Solar, Inc. 
 833 West South Boulder Road, 
 Louisville,
CO 80027 
 Telephone: 303-222-8400 

Re: Real Goods Solar, Inc. - Lock-Up Agreement 

Dear Sirs: 
 This Lock-Up Agreement is being
delivered to you in connection with the Securities Purchase Agreement (the “Purchase Agreement”), dated as of February    , 2015 by and among Real Goods Solar, Inc. (the “Company”), and the
investors party thereto (the “Buyers”), with respect to the issuance of (i) shares of Class A common stock of the Company, par value $0.0001 per share (the “Common Stock”), and (ii) Series A Warrants,
Series B Warrants, Series C Warrants, Series D Warrants and, to certain Buyers, Series E Warrants, each of which is exercisable to purchase shares of Common Stock. Capitalized terms used herein and not otherwise defined herein shall have the
respective meanings set forth in the Purchase Agreement. 
 In order to induce the Buyers to enter into the Purchase Agreement, the
undersigned agrees that, commencing on the date hereof and ending on the date that is six (6) months immediately following the Closing Date (the “Lock-Up Period”), the undersigned will not, and will cause all affiliates (as
defined in Rule 144 promulgated under the Securities Act of 1933, as amended) of the undersigned or any person in privity with the undersigned or any affiliate of the undersigned not to (i) sell, offer to sell, contract or agree to sell,
hypothecate, pledge, grant any option to purchase, make any short sale or otherwise dispose of or agree to dispose of, directly or indirectly, any shares of Common Stock or Common Stock Equivalents, or establish or increase a put equivalent position
or liquidate or decrease a call equivalent position within the meaning of Section 16 of the Securities and Exchange Act of 1934, as amended and the rules and regulations of the Securities and Exchange Commission promulgated thereunder with
respect to any shares of Common Stock or Common Stock Equivalents owned directly by the undersigned (including holding as a custodian) or with respect to which the undersigned has beneficial ownership within the rules and regulations of the
Securities and Exchange Commission (collectively, the “Undersigned’s Shares”), or (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership
of any of the Undersigned’s Shares, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of shares of Common Stock or other securities, in cash or otherwise, (iii) make any demand for or
exercise any right or cause to be filed a registration statement, including any amendments thereto, with respect to the registration of any shares of Common Stock or Common Stock Equivalents or (iv) publicly disclose the intention to do any of
the foregoing. 

 The foregoing restriction is expressly agreed to preclude the undersigned, and any affiliate of
the undersigned and any person in privity with the undersigned or any affiliate of the undersigned, from engaging in any hedging or other transaction which is designed to or which reasonably could be expected to lead to or result in a sale or
disposition of the Undersigned’s Shares even if the Undersigned’s Shares would be disposed of by someone other than the undersigned. Such prohibited hedging or other transactions would include, without limitation, any short sale or any
purchase, sale or grant of any right (including, without limitation, any put or call option) with respect to any of the Undersigned’s Shares or with respect to any security that includes, relates to, or derives any significant part of its value
from the Undersigned’s Shares. 
 Notwithstanding the foregoing, the undersigned may transfer the Undersigned’s Shares (i) as
a bona fide gift or gifts, provided that the donee or donees thereof agree to be bound in writing by the restrictions set forth herein or (ii) to any trust for the direct or indirect benefit of the undersigned or the immediate family of
the undersigned, provided that the trustee of the trust agrees to be bound in writing by the restrictions set forth herein, and provided further that any such transfer shall not involve a disposition for value. For purposes of this Lock-Up
Agreement, “immediate family” shall mean any relationship by blood, marriage or adoption, not more remote than first cousin. The undersigned now has, and, except as contemplated by the immediately preceding sentence, for the duration of
this Lock-Up Agreement will have, good and marketable title to the Undersigned’s Shares, free and clear of all liens, encumbrances, and claims whatsoever. The undersigned also agrees and consents to the entry of stop transfer instructions with
the Company’s transfer agent (the “Transfer Agent”) and registrar against the transfer of the Undersigned’s Shares except in compliance with the foregoing restrictions. 

In order to enforce this covenant, the Company shall impose irrevocable stop-transfer instructions preventing the Transfer Agent from
effecting any actions in violation of this Lock-Up Agreement. 
 The undersigned acknowledges that the execution, delivery and performance
of this Lock-Up Agreement is a material inducement to each Buyer to complete the transactions contemplated by the Purchase Agreement and that the Company shall be entitled to specific performance of the undersigned’s obligations hereunder. The
undersigned hereby represents that the undersigned has the power and authority to execute, deliver and perform this Lock-Up Agreement, that the undersigned has received adequate consideration therefor and that the undersigned will indirectly benefit
from the closing of the transactions contemplated by the Purchase Agreement. 
 The undersigned understands and agrees that this Lock-Up
Agreement is irrevocable and shall be binding upon the undersigned’s heirs, legal representatives, successors, and assigns. 
 This
Lock-Up Agreement may be executed in two counterparts, each of which shall be deemed an original but both of which shall be considered one and the same instrument. 

 This Lock-Up Agreement will be governed by and construed in accordance with the laws of the State
of New York, without giving effect to any choice of law or conflicting provision or rule (whether of the State of New York, or any other jurisdiction) that would cause the laws of any jurisdiction other than the State of New York to be applied. In
furtherance of the foregoing, the internal laws of the State of New York will control the interpretation and construction of this Lock-Up Agreement, even if under such jurisdiction’s choice of law or conflict of law analysis, the substantive
law of some other jurisdiction would ordinarily apply. 
 [Remainder of page intentionally left blank] 

 
	
	Very truly yours,
	
	  

	Exact Name of Shareholder
	
	  

	Authorized Signature
	
	  

	Title

  

			
	Agreed to and Acknowledged:
	
	REAL GOODS SOLAR, INC.
		
	By:		  

			Name:
			Title:

 [Signature Page to Lock-Up 

Agreement]

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