Document:

Exhibit 10.4

 

REGISTRATION RIGHTS AGREEMENT

 

THIS REGISTRATION RIGHTS
AGREEMENT (this “Agreement”), dated as of [●], 2019, is made and entered into by and among Switchback
Energy Acquisition Corporation, a Delaware corporation (the “Company”), NGP Switchback, LLC, a Delaware
limited liability company (the “Sponsor”), and the undersigned parties listed under Holder on the signature
page hereto (each such party, together with the Sponsor and any person or entity who hereafter becomes a party to this Agreement
pursuant to Section 5.2 of this Agreement, a “Holder” and collectively the “Holders”).

 

RECITALS

 

WHEREAS, the Sponsor,
Joseph B. Armes and Zane W. Arrott own an aggregate of 8,625,000 shares of the Company’s Class B common stock, par value
$0.0001 per share (the “Founder Shares”);

 

WHEREAS, the Founder
Shares will automatically convert into shares of the Company’s Class A common stock, par value $0.0001 per share (the “Common
Stock”), at the time of the Company’s initial Business Combination (as defined below) on a one-for-one basis,
subject to adjustment, on the terms and conditions provided in the Company’s amended and restated certificate of incorporation;

 

WHEREAS, on [●],
2019, the Company and the Sponsor entered into that certain Private Placement Warrants Purchase Agreement, pursuant to which the
Sponsor agreed to purchase 5,333,333 warrants (or 5,933,333 warrants if the over-allotment option in connection with the Company’s
initial public offering is exercised in full) (the “Private Placement Warrants”) in a private placement
transaction occurring simultaneously with the closing of the Company’s initial public offering; and

 

WHEREAS, the Company
and the Holders desire to enter into this Agreement, pursuant to which the Company shall grant the Holders certain registration
rights with respect to certain securities of the Company, as set forth in this Agreement.

 

NOW, THEREFORE,
in consideration of the representations, covenants and agreements contained herein, and certain other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound, hereby agree as
follows:

 

ARTICLE I

DEFINITIONS

 

1.1. Definitions.
The terms defined in this Article I shall, for all purposes of this Agreement, have the respective meanings set forth
below:

 

”Adverse Disclosure”
shall mean any public disclosure of material non-public information, which disclosure, in the good faith judgment of the Chief
Executive Officer or principal financial officer of the Company, after consultation with counsel to the Company, (i) would
be required to be made in any Registration Statement or Prospectus in order for the applicable Registration Statement or Prospectus
not to contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements contained
therein (in the case of any prospectus and any preliminary prospectus, in the light of the circumstances under which they were
made) not misleading, (ii) would not be required to be made at such time if the Registration Statement were not being filed,
and (iii) the Company has a bona fide business purpose for not making such information public.

 

“Agreement”
shall have the meaning given in the Preamble.

 

“Board”
shall mean the Board of Directors of the Company.

 

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“Business
Combination” shall mean any merger, capital stock exchange, asset acquisition, stock purchase, reorganization or
other similar business combination with one or more businesses, involving the Company.

 

“Commission”
shall mean the Securities and Exchange Commission.

 

“Common Stock”
shall have the meaning given in the Recitals hereto.

 

“Company”
shall have the meaning given in the Preamble.

 

“Demand Registration”
shall have the meaning given in subsection 2.1.1 of this Agreement.

 

“Demanding
Holder” shall mean, (i) for purposes of a Demand Registration, any Holder or group of Holders, that together holds
Registrable Securities having an aggregate value of at least $25 million, at the time of the written demand, and (ii) for purposes
of an Underwritten Demand, any Holder or group of Holders, that together elects to dispose of Registrable Securities having an
aggregate value of at least $25 million, at the time of the Underwritten Demand, under a Registration Statement pursuant to an
Underwritten Offering.

 

“Effectiveness
Period” shall have the meaning given in subsection 3.1.1 of this Agreement.

 

“Exchange
Act” shall mean the Securities Exchange Act of 1934, as it may be amended from time to time.

 

“Form S-3”
shall mean Form S-3 or any similar short-form registration statement that may be available at such time.

 

“Founder Shares”
shall have the meaning given in the Recitals hereto.

 

“Founder Shares
Lock-up Period” shall mean, with respect to the Founder Shares, until the earlier of (A) one year after the date
of the consummation of a Business Combination and (B) the earlier to occur of, subsequent to a Business Combination, (i) the first
date on which the last reported sale price of the Common Stock equals or exceeds $12.00 per share (as adjusted for stock splits,
stock dividends, reorganizations, recapitalizations and the like) for any twenty (20) trading days within any thirty (30) trading-day
period commencing at least one hundred and fifty (150) days after the consummation of a Business Combination and (ii) the date
on which the Company consummates a subsequent liquidation, merger, stock exchange or other similar transaction which results in
all of the Company’s stockholders having the right to exchange their shares of Common Stock for cash, securities or other
property.

 

“Holder Indemnified
Persons” shall have the meaning given in subsection 4.1.1 of this Agreement.

 

“Holders”
shall have the meaning given in the Preamble.

 

“Insider Letter”
shall mean the certain letter agreement, dated as of [●], 2019, by and among the Company, the Sponsor and each of the Company’s
officers, directors and director nominees.

 

“Maximum Number
of Securities” shall have the meaning given in subsection 2.1.4 of this Agreement.

 

“Misstatement”
shall mean an untrue statement of a material fact or an omission to state a material fact required to be stated in a Registration
Statement or Prospectus, or necessary to make the statements in a Registration Statement or Prospectus in the light of the circumstances
under which they were made not misleading.

 

“Piggyback
Registration” shall have the meaning given in subsection 2.2.1 of this Agreement.

 

“Private Placement
Lock-up Period” shall mean, with respect to Private Placement Warrants and Common Stock underlying the Private Placement
Warrants, until thirty (30) days after the completion of a Business Combination.

 

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“Private Placement
Warrants” shall have the meaning given in the Recitals hereto.

 

“Pro Rata”
shall have the meaning given in subsection 2.1.4 of this Agreement.

 

“Prospectus”
shall mean the prospectus included in any Registration Statement, as supplemented by any and all prospectus supplements and as
amended by any and all post-effective amendments and including all material incorporated by reference in such prospectus.

 

“Registrable
Security” shall mean (a) the shares of Common Stock issued or issuable upon the conversion of any Founder Shares,
(b) the Private Placement Warrants (including any shares of Common Stock issued or issuable upon the exercise of any such
Private Placement Warrants), (c) any equity securities (including the shares of Common Stock issued or issuable upon the exercise
of any such equity security) of the Company issuable upon conversion of any working capital loans in an amount up to $1,500,000
made to the Company by a Holder, (d) any outstanding share of Common Stock or any other equity security (including the shares of
Common Stock issued or issuable upon the exercise of any other equity security) of the Company held by a Holder as of the date
of this Agreement and (e) any other equity security of the Company issued or issuable with respect to any such share of Common
Stock by way of a stock dividend or stock split or in connection with a combination of shares, recapitalization, merger, consolidation
or reorganization; provided, however, that, as to any particular Registrable Security, such securities shall cease
to be Registrable Securities when: (A) a Registration Statement with respect to the sale of such securities shall have become
effective under the Securities Act and such securities shall have been sold, transferred, disposed of or exchanged in accordance
with such Registration Statement; (B) such securities shall have been otherwise transferred, new certificates for such securities
not bearing a legend restricting further transfer shall have been delivered by the Company and subsequent public distribution of
such securities shall not require registration under the Securities Act; (C) such securities shall have ceased to be outstanding;
or (D) such securities may be sold without registration pursuant to Rule 144 promulgated under the Securities Act (or any successor
rule promulgated thereafter by the Commission) (but with no volume or other restrictions or limitations).

 

“Registration”
shall mean a registration effected by preparing and filing a registration statement or similar document in compliance with the
requirements of the Securities Act, and the applicable rules and regulations promulgated thereunder, and any such registration
statement having been declared effective by, or become effective pursuant to rules promulgated by, the Commission.

 

“Registration
Expenses” shall mean the out-of-pocket expenses of a Registration, including, without limitation, the following:

 

(A) all registration and
filing fees (including fees with respect to filings required to be made with the Financial Industry Regulatory Authority and any
securities exchange on which the Common Stock is then listed);

 

(B) fees and expenses
of compliance with securities or blue sky laws (including reasonable fees and disbursements of counsel for the Underwriters in
connection with blue sky qualifications of Registrable Securities);

 

(C) printing, messenger,
telephone and delivery expenses;

 

(D) reasonable fees and
disbursements of counsel for the Company;

 

(E) reasonable fees and
disbursements of all independent registered public accountants of the Company incurred specifically in connection with such Registration;
and

 

(F) reasonable fees and
expenses of one (1) legal counsel selected by the Demanding Holders initiating a Demand Registration or Underwritten Demand
to be registered for offer and sale in the applicable Registration or Underwritten Offering.

 

“Registration
Statement” shall mean any registration statement under the Securities Act that covers the Registrable Securities
pursuant to the provisions of this Agreement, including the Prospectus included in such registration statement, amendments (including
post-effective amendments) and supplements to such registration statement, and all exhibits to and all material incorporated by
reference in such registration statement.

 

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“Requesting
Holder” shall have the meaning given in subsection 2.1.3 of this Agreement.

 

“Securities
Act” shall mean the Securities Act of 1933, as amended from time to time.

 

“Sponsor”
shall have the meaning given in the Preamble.

 

“Underwriter”
shall mean a securities dealer who purchases any Registrable Securities as principal in an Underwritten Offering and not as part
of such dealer’s market-making activities.

 

“Underwritten
Demand” shall have the meaning given in subsection 2.1.3 of this Agreement.

 

“Underwritten
Offering” shall mean a Registration in which securities of the Company are sold to an Underwriter in a firm commitment
underwriting for distribution to the public.

 

ARTICLE II

REGISTRATIONS

 

2.1. Demand Registration.

 

2.1.1 Request for Registration.
Subject to the provisions of subsection 2.1.4 and Section 2.3 of this Agreement, at any time and from time
to time on or after the date the Company consummates the Business Combination, any Demanding Holder may make a written demand for
Registration of all of the then-outstanding Registrable Securities and the Company shall file with the Commission, as soon as reasonably
practicable, but in no event later than ninety (90) days following the receipt of such written demand, a Registration Statement
covering such Registrable Securities (a “Demand Registration”). Such written demand will specify the
intended methods of distribution. The Company shall use its reasonable best efforts to cause such Registration Statement to be
declared effective by, or become effective pursuant to rules promulgated by, the Commission as soon as reasonably practicable after
the initial filing of the Registration Statement in accordance with Section 3.1 of this Agreement.

 

2.1.2 Effective Registration.
Notwithstanding the provisions of subsection 2.1.1 of this Agreement or any other part of this Agreement, a Registration
pursuant to a Demand Registration shall not count as a Registration unless and until (i) the Registration Statement filed
with the Commission with respect to a Registration pursuant to a Demand Registration has been declared effective by, or become
effective pursuant to rules promulgated by, the Commission and (ii) the Company has complied with all of its obligations under
this Agreement with respect thereto. The Company shall not be obligated or required to file another Registration Statement until
the Registration Statement that has been previously filed with respect to a Registration pursuant to a Demand Registration is subsequently
terminated. Subject to the limitations contained in this Agreement, the Company shall effect any Demand Registration on such appropriate
registration form of the Commission (x) as shall be selected by the Company and (y) as shall permit the disposition of
the Registrable Securities in accordance with the intended method or methods of disposition specified in the Demand Registration.
If at any time a Registration Statement on Form S-3 filed with the Commission pursuant to Section 2.1.1 of this Agreement
is effective and a Holder provides written notice to the Company that it intends to effect an offering of all or part of the Registrable
Securities included on such Registration Statement, the Company will amend or supplement such Registration Statement as may be
necessary in order to enable such offering to take place in accordance with the terms of this Agreement.

 

2.1.3 Underwritten Offering.
Subject to the provisions of subsection 2.1.4 and Section 2.3 of this Agreement, any Demanding Holder may
make a written demand for an Underwritten Offering pursuant to a Registration Statement filed with the Commission in accordance
with Section 2.1.1 of this Agreement (an “Underwritten Demand”). The Company shall, within ten
(10) days of the Company’s receipt of the Underwritten Demand, notify, in writing, all other Holders of such demand, and
each Holder who thereafter wishes to include all or a portion of such Holder’s Registrable Securities in such Underwritten
Offering pursuant to an Underwritten Demand (each such Holder that includes all or a portion of such Holder’s Registrable
Securities in such Underwritten Offering, a “Requesting Holder”) shall so notify the Company, in writing,
within two (2) days (one (1) day if such offering is an overnight or bought Underwritten Offering) after the receipt by the
Holder of the notice from the Company. Upon receipt by the Company of any such written notification from a Requesting Holder(s),
such Requesting Holder(s) shall be entitled to have their Registrable Securities included in the Underwritten Offering pursuant
to an Underwritten Demand. All such Holders proposing to distribute their Registrable Securities through an Underwritten Offering
under this subsection 2.1.3 shall enter into an underwriting agreement in customary form with the Underwriter(s) selected
for such Underwritten Offering by the Demanding Holders initiating the Underwritten Offering. Notwithstanding the foregoing, the
Company is not obligated to effect more than an aggregate of three (3) Underwritten Offerings pursuant to this subsection 2.1.3
and is not obligated to effect an Underwritten Offering pursuant to this subsection 2.1.3 within ninety (90) days after
the closing of an Underwritten Offering.

 

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2.1.4 Reduction of Underwritten
Offering. If the managing Underwriter or Underwriters in an Underwritten Offering pursuant to a Underwritten Demand, in good
faith, advises or advise the Company, the Demanding Holders, the Requesting Holders and other persons or entities holding Common
Stock or other equity securities of the Company that the Company is obligated to include pursuant to separate written contractual
arrangements with such persons or entities (if any) in writing that the dollar amount or number of Registrable Securities or other
equity securities of the Company requested to be included in such Underwritten Offering exceeds the maximum dollar amount or maximum
number of equity securities of the Company that can be sold in the Underwritten Offering without adversely affecting the proposed
offering price, the timing, the distribution method or the probability of success of such offering (such maximum dollar amount
or maximum number of such securities, as applicable, the “Maximum Number of Securities”), then the Company
shall include in such Underwritten Offering, as follows: (i) first, the Registrable Securities of the Demanding Holders and
the Requesting Holders (if any) (pro rata based on the respective number of Registrable Securities that each Demanding Holder and
Requesting Holder (if any) has requested be included in such Underwritten Offering and the aggregate number of Registrable Securities
that the Demanding Holders and Requesting Holders have requested be included in such Underwritten Offering (such proportion is
referred to herein as “Pro Rata”)) that can be sold without exceeding the Maximum Number of Securities;
(ii) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause (i),
Common Stock or other equity securities of the Company that the Company desires to sell and that can be sold without exceeding
the Maximum Number of Securities; and (iii) third, to the extent that the Maximum Number of Securities has not been reached
under the foregoing clauses (i) and (ii), Common Stock or other equity securities of the Company held by other persons
or entities that the Company is obligated to include pursuant to separate written contractual arrangements with such persons or
entities and that can be sold without exceeding the Maximum Number of Securities.

 

2.1.5 Demand Registration
Withdrawal. The Demanding Holders initiating a Demand Registration pursuant to a Registration under subsection 2.1.1
of this Agreement shall have the right to withdraw from such Registration pursuant to such Demand Registration for any or no
reason whatsoever upon written notification to the Company of their intention to withdraw from such Registration prior to the effectiveness
of the Registration Statement filed with the Commission with respect to the Registration of their Registrable Securities pursuant
to such Demand Registration. Notwithstanding anything to the contrary in this Agreement, the Company shall be responsible for the
Registration Expenses incurred in connection with a Registration pursuant to a Demand Registration prior to its withdrawal under
this subsection 2.1.5.

 

2.2. Piggyback Registration.

 

2.2.1 Piggyback Rights.
If, at any time on or after the date the Company consummates a Business Combination, the Company proposes to (i) file a Registration
Statement under the Securities Act with respect to an offering of equity securities of the Company, or securities or other obligations
exercisable or exchangeable for, or convertible into equity securities of the Company, for its own account or for the account of
stockholders of the Company, other than a Registration Statement (A) filed in connection with any employee stock option or
other benefit plan, (B) for an exchange offer or offering of securities solely to the Company’s existing stockholders,
(C) for an offering of debt that is convertible into equity securities of the Company or (D) for a dividend reinvestment
plan, or (ii) consummate an Underwritten Offering for its own account or for the account of stockholders of the Company, then the
Company shall give written notice of such proposed action to all of the Holders of Registrable Securities as soon as practicable
(but in the case of filing a Registration Statement, not less than ten (10) days before the anticipated filing date of such Registration
Statement), which notice shall (x) describe the amount and type of securities to be included, the intended method(s) of distribution
and the name of the proposed managing Underwriter or Underwriters, if any, and (y) offer to all of the Holders of Registrable
Securities the opportunity to register the sale of such number of Registrable Securities as such Holders may request in writing
within (a) five (5) days in the case of filing a Registration Statement and (b) two (2) days in the case of an Underwritten
Offering (unless such offering is an overnight or bought Underwritten Offering, then one (1) day), in each case after receipt of
such written notice (such Registration a “Piggyback Registration”). The Company shall, in good faith,
cause such Registrable Securities to be included in such Piggyback Registration and shall use its best efforts to cause the managing
Underwriter or Underwriters of a proposed Underwritten Offering to permit the Registrable Securities requested by the Holders pursuant
to this subsection 2.2.1 to be included in a Piggyback Registration on the same terms and conditions as any similar
securities of the Company included in such Piggyback Registration and to permit the sale or other disposition of such Registrable
Securities in accordance with the intended method(s) of distribution thereof. All such Holders proposing to include Registrable
Securities in an Underwritten Offering under this subsection 2.2.1 shall enter into an underwriting agreement in customary
form with the Underwriter(s) selected for such Underwritten Offering by the Company.

 

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2.2.2 Reduction of Piggyback
Registration. If the managing Underwriter or Underwriters in an Underwritten Offering that is to be a Piggyback Registration,
in good faith, advises the Company and the Holders of Registrable Securities participating in the Piggyback Registration in writing
that the dollar amount or number of shares of the equity securities of the Company that the Company desires to sell, taken together
with (i) the shares of equity securities of the Company, if any, as to which Registration or Underwritten Offering has been
demanded pursuant to separate written contractual arrangements with persons or entities other than the Holders of Registrable Securities
hereunder, (ii) the Registrable Securities as to which Registration or Underwritten Offering has been requested pursuant to
Section 2.2 of this Agreement and (iii) the shares of equity securities of the Company, if any, as to which Registration
or Underwritten Offering has been requested pursuant to separate written contractual piggyback registration rights of other stockholders
of the Company, exceeds the Maximum Number of Securities, then:

 

(a) If the Registration
or Underwritten Offering is undertaken for the Company’s account, the Company shall include in any such Registration or Underwritten
Offering (A) first, the Common Stock or other equity securities of the Company that the Company desires to sell, which can
be sold without exceeding the Maximum Number of Securities; (B) second, to the extent that the Maximum Number of Securities
has not been reached under the foregoing clause (A), the Registrable Securities of Holders exercising their rights
to register their Registrable Securities pursuant to subsection 2.2.1 of this Agreement, Pro Rata, which can be sold
without exceeding the Maximum Number of Securities; and (C) third, to the extent that the Maximum Number of Securities has
not been reached under the foregoing clauses (A) and (B), Common Stock or other equity securities of the
Company, if any, as to which Registration or Underwritten Offering has been requested pursuant to written contractual piggyback
registration rights of other stockholders of the Company, which can be sold without exceeding the Maximum Number of Securities;
or

 

(b) If the Registration
or Underwritten Offering is pursuant to a request by persons or entities other than the Holders of Registrable Securities, then
the Company shall include in any such Registration or Underwritten Offering (A) first, Common Stock or other equity securities
of the Company, if any, of such requesting persons or entities, other than the Holders of Registrable Securities, which can be
sold without exceeding the Maximum Number of Securities; (B) second, to the extent that the Maximum Number of Securities has
not been reached under the foregoing clause (A), the Registrable Securities of Holders exercising their rights to register
their Registrable Securities pursuant to subsection 2.2.1 of this Agreement, Pro Rata, which can be sold without exceeding
the Maximum Number of Securities; (C) third, to the extent that the Maximum Number of Securities has not been reached under
the foregoing clauses (A) and (B), Common Stock or other equity securities of the Company that the Company
desires to sell, which can be sold without exceeding the Maximum Number of Securities; and (D) fourth, to the extent that
the Maximum Number of Securities has not been reached under the foregoing clauses (A), (B) and (C),
Common Stock or other equity securities of the Company for the account of other persons or entities that the Company is obligated
to register pursuant to separate written contractual arrangements with such persons or entities, which can be sold without exceeding
the Maximum Number of Securities.

 

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2.2.3 Piggyback Registration
Withdrawal. Any Holder of Registrable Securities shall have the right to withdraw from a Piggyback Registration for any or
no reason whatsoever upon written notification to the Company and the Underwriter or Underwriters (if any) of his, her or its intention
to withdraw from such Piggyback Registration prior to the effectiveness of the Registration Statement filed with the Commission
with respect to such Piggyback Registration. The Company (whether on its own good faith determination or as the result of a request
for withdrawal by persons pursuant to separate written contractual obligations) may withdraw a Registration Statement filed with
the Commission in connection with a Piggyback Registration at any time prior to the effectiveness of such Registration Statement.
Notwithstanding anything to the contrary in this Agreement, the Company shall be responsible for the Registration Expenses incurred
in connection with the Piggyback Registration prior to its withdrawal under this subsection 2.2.3.

 

2.2.4 Unlimited Piggyback
Registration Rights. For purposes of clarity, any Registration or Underwritten Offering effected pursuant to Section 2.2
of this Agreement shall not be counted as an Underwritten Offering pursuant to an Underwritten Demand effected under Section
2.1 of this Agreement.

 

2.3 Restrictions on
Registration Rights. If (A) the Holders have requested an Underwritten Offering pursuant to an Underwritten Demand and
the Company and the Holders are unable to obtain the commitment of underwriters to firmly underwrite the offer; or (B) the
Holders have requested a Demand Registration or an Underwritten Offering pursuant to an Underwritten Demand and in the good faith
judgment of the Board such Registration or Underwritten Offering would be seriously detrimental to the Company and the Board concludes
as a result that it is essential to defer the filing of such Registration Statement or the undertaking of such Underwritten Offering
at such time, then in each case the Company shall furnish to such Holders a certificate signed by the Chairman of the Board stating
that in the good faith judgment of the Board it would be seriously detrimental to the Company for such Registration Statement to
be filed or to undertake such Underwritten Offering in the near future and that it is therefore essential to defer the filing of
such Registration Statement or undertaking of such Underwritten Offering. In such event, the Company shall have the right to defer
such filing or offering for a period of not more than thirty (30) days; provided, however, that the Company shall not defer its
obligation in this manner more than once in any twelve (12)-month period. Notwithstanding anything to the contrary contained in
this Agreement, no Registration or Underwritten Offering shall be effected or permitted and no Registration Statement shall become
effective, with respect to any Registrable Securities held by any Holder, until after the expiration of the Founder Shares Lock-up
Period or the Private Placement Lock-up Period, as the case may be.

 

ARTICLE III

COMPANY PROCEDURES

 

3.1. General Procedures.
If at any time on or after the date the Company consummates a Business Combination the Company is required to effect the Registration
of Registrable Securities pursuant to this Agreement, the Company shall use its best efforts to effect such Registration to permit
the sale of such Registrable Securities in accordance with the intended plan of distribution thereof, and pursuant thereto the
Company shall, as expeditiously as possible and to the extent applicable:

 

3.1.1 prepare and file with
the Commission as soon as practicable a Registration Statement with respect to such Registrable Securities and use its reasonable
best efforts to cause such Registration Statement to become effective and remain effective until all Registrable Securities covered
by such Registration Statement have been sold or are no longer outstanding (such period, the “Effectiveness Period”);

 

3.1.2 prepare and file with
the Commission such amendments and post-effective amendments to the Registration Statement, and such supplements to the Prospectus,
as may be reasonably requested by the Demanding Holders or any Underwriter or as may be required by the rules, regulations or instructions
applicable to the registration form used by the Company or by the Securities Act or rules and regulations thereunder to keep the
Registration Statement effective until all Registrable Securities covered by such Registration Statement are sold in accordance
with the intended plan of distribution set forth in such Registration Statement or supplement to the Prospectus or are no longer
outstanding;

 

3.1.3 prior to filing a
Registration Statement or Prospectus, or any amendment or supplement thereto, furnish without charge to the Underwriters, if any,
and the Holders of Registrable Securities included in such Registration or Underwritten Offering, and such Holders’ legal
counsel, copies of such Registration Statement as proposed to be filed, each amendment and supplement to such Registration Statement
(in each case including all exhibits thereto and documents incorporated by reference therein), the Prospectus (including each preliminary
Prospectus) and such other documents as the Underwriters and the Holders of Registrable Securities included in such Registration
or the legal counsel for any such Holders may reasonably request in order to facilitate the disposition of the Registrable Securities
owned by such Holders; provided, that the Company will not have any obligation to provide any document pursuant to this
clause that is available on the Commission’s EDGAR system;

 

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3.1.4 prior to any public
offering of Registrable Securities, use its best efforts to (i) register or qualify the Registrable Securities covered by
the Registration Statement under such securities or “blue sky” laws of such jurisdictions in the United States as the
Holders of Registrable Securities included in such Registration Statement (in light of their intended plan of distribution) may
request and (ii) take such action necessary to cause such Registrable Securities covered by the Registration Statement to
be registered with or approved by such other governmental authorities as may be necessary by virtue of the business and operations
of the Company and do any and all other acts and things that may be necessary or advisable to enable the Holders of Registrable
Securities included in such Registration Statement to consummate the disposition of such Registrable Securities in such jurisdictions;
provided, however, that the Company shall not be required to qualify generally to do business in any jurisdiction where
it would not otherwise be required to qualify or take any action to which it would be subject to general service of process or
taxation in any such jurisdiction where it is not then otherwise so subject;

 

3.1.5 cause all such Registrable
Securities to be listed on each securities exchange or automated quotation system on which similar securities issued by the Company
are then listed;

 

3.1.6 provide a transfer
agent or warrant agent, as applicable, and registrar for all such Registrable Securities no later than the effective date of such
Registration Statement;

 

3.1.7 advise each seller
of such Registrable Securities, promptly after it shall receive notice or obtain knowledge thereof, of the issuance of any stop
order by the Commission suspending the effectiveness of such Registration Statement or the initiation or threatening of any proceeding
for such purpose and promptly use its reasonable best efforts to prevent the issuance of any stop order or to obtain its withdrawal
if such stop order should be issued;

 

3.1.8 during the Effectiveness
Period, furnish a conformed copy of each filing of any Registration Statement or Prospectus or any amendment or supplement to such
Registration Statement or Prospectus or any document that is to be incorporated by reference into such Registration Statement or
Prospectus, promptly after such filing of such documents with the Commission to each seller of such Registrable Securities or its
counsel; provided, that the Company will not have any obligation to provide any document pursuant to this clause that is
available on the Commission’s EDGAR system;

 

3.1.9 notify the Holders
at any time when a Prospectus relating to such Registration Statement is required to be delivered under the Securities Act, of
the happening of any event as a result of which the Prospectus included in such Registration Statement, as then in effect, includes
a Misstatement, and then to correct such Misstatement as set forth in Section 3.4 of this Agreement;

 

3.1.10 permit a representative
of the Holders, the Underwriters, if any, and any attorney or accountant retained by such Holders or Underwriter to participate,
at each such person’s own expense, in the preparation of the Registration Statement or the Prospectus, and cause the Company’s
officers, directors and employees to supply all information reasonably requested by any such representative, Underwriter, attorney
or accountant in connection with the Registration; provided, however, that such representatives or Underwriters enter into
a confidentiality agreement, in form and substance reasonably satisfactory to the Company, prior to the release or disclosure of
any such information;

 

3.1.11 obtain a comfort
letter from the Company’s independent registered public accountants in the event of an Underwritten Offering, in customary
form and covering such matters of the type customarily covered by comfort letters as the managing Underwriter may reasonably request,
and reasonably satisfactory to a majority-in-interest of the participating Holders;

 

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3.1.12 on the date the Registrable
Securities are delivered for sale pursuant to such Registration, obtain an opinion, dated such date, of counsel representing the
Company for the purposes of such Registration, addressed to the placement agent or sales agent, if any, and the Underwriters, if
any, covering such legal matters with respect to the Registration in respect of which such opinion is being given as the placement
agent, sales agent, or Underwriter may reasonably request and as are customarily included in such opinions and negative assurance
letters, and reasonably satisfactory to such placement agent, sales agent or Underwriter;

 

3.1.13 in the event of any
Underwritten Offering, enter into and perform its obligations under an underwriting agreement, in usual and customary form, with
the managing Underwriter of such offering;

 

3.1.14 make available to
its security holders, as soon as reasonably practicable, an earnings statement covering the period of at least twelve (12) months
beginning with the first day of the Company’s first full calendar quarter after the effective date of the Registration Statement
which satisfies the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder (or any successor rule
promulgated thereafter by the Commission);

 

3.1.15 use its reasonable
efforts to make available senior executives of the Company to participate in customary “road show” presentations that
may be reasonably requested by the Underwriter in any Underwritten Offering; and

 

3.1.16 otherwise, in good
faith, cooperate reasonably with, and take such customary actions as may reasonably be requested by the Holders, in connection
with such Registration.

 

3.2. Registration Expenses.
The Registration Expenses in respect of all Registrations shall be borne by the Company. It is acknowledged by the Holders that
the Holders shall bear all incremental selling expenses relating to the sale of Registrable Securities, such as Underwriters’
commissions and discounts, brokerage fees, Underwriter marketing costs and, other than as set forth in the definition of “Registration
Expenses,” all reasonable fees and expenses of any legal counsel representing the Holders.

 

3.3. Requirements for
Participation in Underwritten Offerings. No person may participate in any Underwritten Offering for equity securities of the
Company pursuant to a Registration initiated by the Company hereunder unless such person (i) agrees to sell such person’s
securities on the basis provided in any underwriting arrangements approved by the Company and (ii) completes and executes
all customary questionnaires, powers of attorney, indemnities, lock-up agreements, underwriting agreements and other customary
documents as may be reasonably required under the terms of such underwriting arrangements.

 

3.4 Suspension of Sales;
Adverse Disclosure. Upon receipt of written notice from the Company that a Registration Statement or Prospectus contains a
Misstatement, each of the Holders shall forthwith discontinue disposition of Registrable Securities until he, she or it has received
copies of a supplemented or amended Prospectus correcting the Misstatement (it being understood that the Company hereby covenants
to prepare and file such supplement or amendment as soon as practicable after the time of such notice), or until he, she or it
is advised in writing by the Company that the use of the Prospectus may be resumed. If the filing, initial effectiveness or continued
use of a Registration Statement in respect of any Registration or Underwritten Offering at any time would require the Company to
make an Adverse Disclosure or would require the inclusion in such Registration Statement of financial statements that are unavailable
to the Company for reasons beyond the Company’s control, the Company may, upon giving prompt written notice of such action
to the Holders, delay the filing or initial effectiveness of, or suspend use of, such Registration Statement for the shortest period
of time, but in no event more than thirty (30) days, determined in good faith by the Company to be necessary for such purpose.
In the event the Company exercises its rights under the preceding sentences in this Section 3.4, the Holders agree to suspend,
immediately upon their receipt of the notices referred to in this Section 3.4, their use of the Prospectus relating to any
Registration in connection with any sale or offer to sell Registrable Securities. The Company shall immediately notify the Holders
of the expiration of any period during which it exercised its rights under this Section 3.4.

 

3.5 Reporting Obligations.
As long as any Holder shall own Registrable Securities, the Company, at all times while it shall be a reporting company under the
Exchange Act, covenants to file timely (or obtain extensions in respect thereof and file within the applicable grace period) all
reports required to be filed by the Company after the date hereof pursuant to Section 13(a) or 15(d) of the Exchange Act.
The Company further covenants that it shall take such further action as any Holder may reasonably request, all to the extent required
from time to time to enable such Holder to sell shares of Registrable Securities held by such Holder without registration under
the Securities Act within the limitation of the exemptions provided by Rule 144 promulgated under the Securities Act (or any
successor rule promulgated thereafter by the Commission), including providing any legal opinions. Upon the request of any Holder,
the Company shall deliver to such Holder a written certification of a duly authorized officer as to whether it has complied with
such requirements.

 

    9

     

    

 

ARTICLE IV

INDEMNIFICATION AND CONTRIBUTION

 

4.1. Indemnification.

 

4.1.1 The Company agrees
to indemnify, to the extent permitted by law, each Holder of Registrable Securities, its officers and directors and each person
who controls such Holder (within the meaning of the Securities Act) (collectively, the “Holder Indemnified Persons”)
against all losses, claims, damages, liabilities and expenses (including reasonable attorneys’ fees and inclusive of all
reasonable attorneys’ fees arising out of the enforcement of each such persons’ rights under this Section 4.1)
resulting from any untrue or alleged untrue statement of material fact contained in any Registration Statement, Prospectus or preliminary
Prospectus or any amendment thereof or supplement thereto or any omission or alleged omission of a material fact required to be
stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading,
except insofar as the same are caused by or contained in any information furnished in writing to the Company by or on behalf of
such Holder Indemnified Person specifically for use therein.

 

4.1.2 In connection with
any Registration Statement in which a Holder of Registrable Securities is participating, such Holder shall furnish to the Company
in writing such information and affidavits as the Company reasonably requests for use in connection with any such Registration
Statement or Prospectus and, to the extent permitted by law, shall, severally and not jointly, indemnify the Company, its directors
and officers and agents and each person who controls the Company (within the meaning of the Securities Act) against any losses,
claims, damages, liabilities and expenses (including reasonable attorneys’ fees and inclusive of all reasonable attorneys’
fees arising out of the enforcement of each such persons’ rights under this Section 4.1) resulting from any untrue
or alleged untrue statement of material fact contained in any Registration Statement, Prospectus or preliminary Prospectus or any
amendment thereof or supplement thereto or any omission or alleged omission of a material fact required to be stated therein or
necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, but only
to the extent that the same are made in reliance on and in conformity with information relating to the Holder so furnished in writing
to the Company by or on behalf of such Holder specifically for use therein. In no event shall the liability of any selling Holder
hereunder be greater in amount than the net proceeds received by such Holder from the sale of Registrable Securities pursuant to
such Registration Statement giving rise to such indemnification obligation.

 

4.1.3 Any person entitled
to indemnification herein shall (i) give prompt written notice to the indemnifying party of any claim with respect to which it
seeks indemnification (provided that the failure to give prompt notice shall not impair any person’s right to indemnification
hereunder to the extent such failure has not materially prejudiced the indemnifying party) and (ii) unless in such indemnified
party’s reasonable judgment a conflict of interest between such indemnified and indemnifying parties may exist with respect
to such claim or there may be reasonable defenses available to the indemnified party that are different from or additional to those
available to the indemnifying party, permit such indemnifying party to assume the defense of such claim with counsel reasonably
satisfactory to the indemnified party. If such defense is assumed, the indemnifying party shall not be subject to any liability
for any settlement made by the indemnified party without its consent (but such consent shall not be unreasonably withheld). An
indemnifying party who is not entitled to, or elects not to, assume the defense of a claim shall not be obligated to pay the fees
and expenses of more than one counsel for all parties indemnified by such indemnifying party with respect to such claim, unless
in the reasonable judgment of any indemnified party a conflict of interest may exist between such indemnified party and any other
of such indemnified parties with respect to such claim. No indemnifying party shall, without the consent of the indemnified party,
consent to the entry of any judgment or enter into any settlement which cannot be settled in all respects by the payment of money
(and such money is so paid by the indemnifying party pursuant to the terms of such settlement) or which settlement does not include
as an unconditional term thereof the giving by the claimant or plaintiff to such indemnified party of a release from all liability
in respect to such claim or litigation.

 

    10

     

    

 

4.1.4 The indemnification
provided for under this Agreement shall remain in full force and effect regardless of any investigation made by or on behalf of
the indemnified party or any officer, director or controlling person of such indemnified party and shall survive the transfer of
securities.

 

4.1.5 If the indemnification
provided under Section 4.1 of this Agreement is held by a court of competent jurisdiction to be unavailable to an indemnified
party in respect of any losses, claims, damages, liabilities and expenses referred to herein, then the indemnifying party, in lieu
of indemnifying the indemnified party, shall to the extent permitted by law contribute to the amount paid or payable by the indemnified
party as a result of such losses, claims, damages, liabilities and expenses in such proportion as is appropriate to reflect the
relative fault of the indemnifying party and the indemnified party, as well as any other relevant equitable considerations. The
relative fault of the indemnifying party and indemnified party shall be determined by a court of law by reference to, among other
things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material
fact relates to information supplied by such indemnifying party or such indemnified party and the indemnifying party’s and
indemnified party’s relative intent, knowledge, access to information and opportunity to correct or prevent such action;
provided, however, that the liability of any Holder under this subsection 4.1.5 shall be limited to the amount
of the net proceeds received by such Holder in such offering giving rise to such liability. The amount paid or payable by a party
as a result of the losses or other liabilities referred to above shall be deemed to include, subject to the limitations set forth
in subsections 4.1.1, 4.1.2 and 4.1.3 of this Agreement, any legal or other fees, charges or expenses
reasonably incurred by such party in connection with any investigation or proceeding. The parties hereto agree that it would not
be just and equitable if contribution pursuant to this subsection 4.1.5 were determined by pro rata allocation or by
any other method of allocation, which does not take account of the equitable considerations referred to in this subsection 4.1.5.
No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled
to contribution pursuant to this subsection 4.1.5 from any person who was not guilty of such fraudulent misrepresentation.

 

ARTICLE V

MISCELLANEOUS

 

5.1 Notices. Any
notice or communication under this Agreement must be in writing and given by (i) deposit in the United States mail, addressed
to the party to be notified, postage prepaid and registered or certified with return receipt requested, (ii) delivery in person
or by courier service providing evidence of delivery or (iii) transmission by hand delivery, telecopy, telegram, facsimile
or email. Each notice or communication that is mailed, delivered or transmitted in the manner described above shall be deemed sufficiently
given, served, sent, and received, in the case of mailed notices, on the third (3rd) business day following the date on which it
is mailed, in the case of notices delivered by courier service, hand delivery, telecopy or telegram, at such time as it is delivered
to the addressee (with the delivery receipt or the affidavit of messenger) or at such time as delivery is refused by the addressee
upon presentation, and in the case of notices delivered by facsimile or email, at such time as it is successfully transmitted to
the addressee. Any notice or communication under this Agreement must be addressed, if to the Company or the Sponsor, to: 5949 Sherry Lane, Suite 1010, Dallas, TX 75225, or by email at: jmutrie@switchback-energy.com, and, if to any
Holder, to the address of such Holder as it appears in the applicable register for the Registrable Securities or such other address
as may be designated in writing by such Holder (including on the signature pages hereto). Any party may change its address for
notice at any time and from time to time by written notice to the other parties hereto, and such change of address shall become
effective thirty (30) days after delivery of such notice as provided in this Section 5.1.

 

5.2 Assignment; No
Third Party Beneficiaries.

 

5.2.1 This Agreement and
the rights, duties and obligations of the Company hereunder may not be assigned or delegated by the Company in whole or in part.

 

5.2.2 This Agreement and
the provisions hereof shall be binding upon and shall inure to the benefit of each of the parties and its successors.

 

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5.2.3 This Agreement shall
not confer any rights or benefits on any persons that are not parties hereto, other than as expressly set forth in this Agreement
and Section 5.2 of this Agreement.

 

5.2.4 No assignment by any
party hereto of such party’s rights, duties and obligations hereunder shall be binding upon or obligate the Company unless
and until the Company shall have received (i) written notice of such assignment as provided in Section 5.1 of
this Agreement and (ii) the written agreement of the assignee, in a form reasonably satisfactory to the Company, to be bound
by the terms and provisions of this Agreement (which may be accomplished by an addendum or certificate of joinder to this Agreement).
Any transfer or assignment made other than as provided in this Section 5.2 shall be null and void.

 

5.3 Counterparts.
This Agreement may be executed in multiple counterparts (including facsimile or PDF counterparts), each of which shall be deemed
an original, and all of which together shall constitute the same instrument, but only one of which need be produced.

 

5.4 Governing Law;
Venue. NOTWITHSTANDING THE PLACE WHERE THIS AGREEMENT MAY BE EXECUTED BY ANY OF THE PARTIES HERETO, THE PARTIES EXPRESSLY AGREE
THAT THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED UNDER THE LAWS OF THE STATE OF NEW YORK AS APPLIED TO AGREEMENTS AMONG NEW
YORK RESIDENTS ENTERED INTO AND TO BE PERFORMED ENTIRELY WITHIN NEW YORK, WITHOUT REGARD TO THE CONFLICT OF LAW PROVISIONS OF SUCH
JURISDICTION.

 

5.5 Amendments and
Modifications. Upon the written consent of the Company and the Holders of at least a majority in interest of the Registrable
Securities at the time in question, compliance with any of the provisions, covenants and conditions set forth in this Agreement
may be waived, or any of such provisions, covenants or conditions may be amended or modified; provided, however, that notwithstanding
the foregoing, any amendment hereto or waiver hereof that adversely affects one Holder, solely in his, her or its capacity as a
holder of the shares of capital stock of the Company, in a manner that is materially different from the other Holders (in such
capacity) shall require the consent of the Holder so affected. No course of dealing between any Holder or the Company and any other
party hereto or any failure or delay on the part of a Holder or the Company in exercising any rights or remedies under this Agreement
shall operate as a waiver of any rights or remedies of any Holder or the Company. No single or partial exercise of any rights or
remedies under this Agreement by a party shall operate as a waiver or preclude the exercise of any other rights or remedies hereunder
or thereunder by such party.

 

5.6 Other Registration
Rights. The Company represents and warrants that no person, other than a Holder of Registrable Securities, has any right to
require the Company to register any securities of the Company for sale or to include such securities of the Company in any Registration
filed by the Company for the sale of securities for its own account or for the account of any other person. Further, the Company
represents and warrants that this Agreement supersedes any other registration rights agreement or agreement with similar terms
and conditions and in the event of a conflict between any such agreement or agreements and this Agreement, the terms of this Agreement
shall prevail.

 

5.7 Term. This
Agreement shall terminate upon the earlier of (i) the tenth (10th) anniversary of the date of this Agreement and (ii) with
respect to any Holder, the date as of which such Holder ceases to hold any Registrable Securities. The provisions of Article
IV shall survive any termination.

 

[SIGNATURE PAGES FOLLOW]

 

    12

     

    

 

IN WITNESS WHEREOF,
the undersigned have caused this Agreement to be executed as of the date first written above.

 

	 	COMPANY:
	 	 
	 	SWITCHBACK ENERGY ACQUISITION CORPORATION,
	 	a Delaware corporation
	 	 
	 	By:	 	 
	 	 	Name:	Jim Mutrie
	 	 	Title:	Chief Commercial Officer, General Counsel and Secretary
	 	 	 	 
	 	HOLDERS:
	 	 
	 	NGP SWITCHBACK, LLC,
	 	a Delaware limited liability company
	 	 
	 	By:	 	 
	 	 	Name:	Jim Mutrie
	 	 	Title: 	Chief Commercial Officer, General Counsel and Secretary
	 	 	 	 
	 	 
	 	Joseph B. Armes
	 	 
	 	 
	 	Zane W. Arrott

 

 [Signature Page to Registration
Rights Agreement]Exhibit 10.6

 

PRIVATE PLACEMENT WARRANTS PURCHASE AGREEMENT

 

THIS PRIVATE PLACEMENT
WARRANTS PURCHASE AGREEMENT, dated as of [●], 2019 (as it may from time to time be amended, this “Agreement”),
is entered into by and between Switchback Energy Acquisition Corporation, a Delaware corporation (the “Company”), and
NGP Switchback, LLC, a Delaware limited liability company (the “Purchaser”).

 

WHEREAS, the Company
intends to consummate an initial public offering of the Company’s units (the “Public Offering”), each unit consisting
of one share of the Company’s Class A common stock, par value $0.0001 per share (the “Common Stock”), and one-third
of one redeemable warrant as set forth in the Company’s registration statement on Form S-1, filed with the Securities and
Exchange Commission (the “SEC”), File Number 333-[●] (the “Registration Statement”), under the Securities
Act of 1933, as amended (the “Securities Act”). Each whole warrant entitles the holder to purchase one share of Common
Stock at an exercise price of $11.50 per share. The Purchaser has agreed to purchase an aggregate of 5,333,333 warrants (or up
to 5,933,333 warrants if the over-allotment option in connection with the Public Offering is exercised in full) (the “Private
Placement Warrants”), each whole Private Placement Warrant entitling the holder to purchase one share of Common Stock at
an exercise price of $11.50 per share.

 

NOW THEREFORE, in consideration
of the mutual promises contained in this Agreement and other good and valuable consideration, the receipt and sufficiency of which
are hereby acknowledged, the parties to this Agreement hereby, intending legally to be bound, agree as follows:

 

AGREEMENT

 

Section 1. Authorization,
Purchase and Sale; Terms of the Private Placement Warrants.

 

A. Authorization of
the Private Placement Warrants. The Company has duly authorized the issuance and sale of the Private Placement Warrants to
the Purchaser.

 

B. Purchase and Sale
of the Private Placement Warrants.

 

(i) On the date that
is one business day prior to the date of the consummation of the Public Offering or on such earlier time and date as may be mutually
agreed by the Purchaser and the Company (the “Initial Closing Date”), the Company shall issue and sell to the Purchaser,
and the Purchaser shall purchase from the Company, 5,333,333 Private Placement Warrants at a price of $1.50 per warrant for an
aggregate purchase price of $8,000,000 (the “Purchase Price”). The Purchaser shall pay the Purchase Price by wire transfer
of immediately available funds in accordance with the Company’s wiring instructions. On the Initial Closing Date, upon the
payment by the Purchaser of the Purchase Price, the Company shall, at its option, deliver a certificate evidencing the Private
Placement Warrants purchased on such date duly registered in the Purchaser’s name to the Purchaser, or effect such delivery
in book-entry form.

 

(ii) On the date that
is one business day prior to the date of the consummation of the closing of the over-allotment option in connection with the Public
Offering or on such earlier time and date as may be mutually agreed by the Purchaser and the Company (each such date, an “Over-allotment
Closing Date”, and each Over-allotment Closing Date (if any) and the Initial Closing Date being sometimes referred to herein
as a “Closing Date”), the Company shall issue and sell to the Purchaser, and the Purchaser shall purchase from the
Company, up to 600,000 Private Placement Warrants at a price of $1.50 per warrant for an aggregate purchase price of up to $900,000
(if the over-allotment option in connection with the Public Offering is exercised in full) (the “Over-allotment Purchase
Price”). The Purchaser shall pay the Over-allotment Purchase Price by wire transfer of immediately available funds in accordance
with the Company’s wiring instructions. On the Over-allotment Closing Date, upon the payment by the Purchaser of the Over-allotment
Purchase Price, the Company shall, at its option, deliver a certificate evidencing the Private Placement Warrants purchased on
such date duly registered in the Purchaser’s name to the Purchaser, or effect such delivery in book-entry form.

 

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C. Terms of the Private
Placement Warrants.

 

(i) Each Private Placement
Warrant shall have the terms set forth in a Warrant Agreement to be entered into by the Company and a warrant agent, in connection
with the Public Offering (the “Warrant Agreement”).

 

(ii) At the time of the
closing of the Public Offering, the Company and the Purchaser shall enter into a registration rights agreement (the “Registration
Rights Agreement”) pursuant to which the Company will grant certain registration rights to the Purchaser relating to the
Private Placement Warrants and the shares of Common Stock underlying the Private Placement Warrants.

 

Section 2. Representations
and Warranties of the Company. As a material inducement to the Purchaser to enter into this Agreement and purchase the Private
Placement Warrants, the Company hereby represents and warrants to the Purchaser (which representations and warranties shall survive
each Closing Date) that:

 

A. Organization and
Corporate Power. The Company is a corporation duly organized, validly existing and in good standing under the laws of the State
of Delaware and is qualified to do business in every jurisdiction in which the failure to so qualify would reasonably be expected
to have a material adverse effect on the financial condition, operating results or assets of the Company. The Company possesses
all requisite corporate power and authority necessary to carry out the transactions contemplated by this Agreement and the Warrant
Agreement.

 

B. Authorization;
No Breach.

 

(i) The execution, delivery
and performance of this Agreement and the Private Placement Warrants have been duly authorized by the Company as of the Closing
Date. This Agreement constitutes the valid and binding obligation of the Company, enforceable in accordance with its terms, subject
to bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other laws of general applicability relating to
or affecting creditors’ rights and to general equitable principles (whether considered in a proceeding in equity or law).
Upon issuance in accordance with, and payment pursuant to, the terms of the Warrant Agreement and this Agreement, the Private Placement
Warrants will constitute valid and binding obligations of the Company, enforceable in accordance with their terms as of the Closing
Date, subject to bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other laws of general applicability
relating to or affecting creditors’ rights and to general equitable principles (whether considered in a proceeding in equity
or law).

 

(ii) The execution and
delivery by the Company of this Agreement and the Private Placement Warrants, the issuance and sale of the Private Placement Warrants,
the issuance of the shares of Common Stock upon exercise of the Private Placement Warrants and the fulfillment of and compliance
with the respective terms hereof and thereof by the Company, do not and will not as of the Closing Date (a) conflict with or result
in a breach of the terms, conditions or provisions of, (b) constitute a default under, (c) result in the creation of any lien,
security interest, charge or encumbrance upon the Company’s capital stock or assets under, (d) result in a violation of,
or (e) require any authorization, consent, approval, exemption or other action by or notice or declaration to, or filing with,
any court or administrative or governmental body or agency pursuant to the Certificate of Incorporation of the Company or the Bylaws
of the Company, or any material law, statute, rule or regulation to which the Company is subject, or any agreement, order, judgment
or decree to which the Company is subject, except for any filings required after the date hereof under federal or state securities
laws.

 

C. Title to Securities.
Upon issuance in accordance with, and payment pursuant to, the terms hereof and the Warrant Agreement, the shares of Common Stock
issuable upon exercise of the Private Placement Warrants will be duly and validly issued, fully paid and non-assessable. Upon issuance
in accordance with, and payment pursuant to, the terms hereof and the Warrant Agreement, the Purchaser will have good title to
the Private Placement Warrants and the shares of Common Stock issuable upon exercise of such Private Placement Warrants, free and
clear of all liens, claims and encumbrances of any kind, other than (i) transfer restrictions hereunder and under the other agreements
contemplated hereby, (ii) transfer restrictions under federal and state securities laws, and (iii) liens, claims or encumbrances
imposed due to the actions of the Purchaser.

 

D. Governmental Consents.
No permit, consent, approval or authorization of, or declaration to or filing with, any governmental authority is required in connection
with the execution, delivery and performance by the Company of this Agreement or the consummation by the Company of any other transactions
contemplated hereby.

 

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Section 3. Representations
and Warranties of the Purchaser. As a material inducement to the Company to enter into this Agreement and issue and sell the
Private Placement Warrants to the Purchaser, the Purchaser hereby represents and warrants to the Company (which representations
and warranties shall survive each Closing Date) that:

 

A. Organization and
Requisite Authority. The Purchaser possesses all requisite power and authority necessary to carry out the transactions contemplated
by this Agreement.

 

B. Authorization;
No Breach.

 

(i) This Agreement constitutes
a valid and binding obligation of the Purchaser, enforceable in accordance with its terms, subject to bankruptcy, insolvency, fraudulent
conveyance, reorganization, moratorium and other laws of general applicability relating to or affecting creditors’ rights
and to general equitable principles (whether considered in a proceeding in equity or law).

 

(ii) The execution and
delivery by the Purchaser of this Agreement and the fulfillment of and compliance with the terms hereof by the Purchaser does not
and shall not as of each Closing Date conflict with or result in a breach by the Purchaser of the terms, conditions or provisions
of any agreement, instrument, order, judgment or decree to which the Purchaser is subject.

 

C. Investment Representations.

 

(i) The Purchaser is
acquiring the Private Placement Warrants and, upon exercise of the Private Placement Warrants, the shares of Common Stock issuable
upon such exercise (collectively, the “Securities”), for the Purchaser’s own account, for investment purposes
only and not with a view towards, or for resale in connection with, any public sale or distribution thereof.

 

(ii) The Purchaser is
an “accredited investor” as such term is defined in Rule 501(a)(3) of Regulation D under the Securities Act.

 

(iii) The Purchaser understands
that the Securities are being offered and will be sold to it in reliance on specific exemptions from the registration requirements
of the United States federal and state securities laws and that the Company is relying upon the truth and accuracy of, and the
Purchaser’s compliance with, the representations and warranties of the Purchaser set forth herein in order to determine the
availability of such exemptions and the eligibility of the Purchaser to acquire such Securities.

 

(iv) The Purchaser did
not decide to enter into this Agreement as a result of any general solicitation or general advertising within the meaning of Rule
502(c) under the Securities Act.

 

(v) The Purchaser has
been furnished with all materials relating to the business, finances and operations of the Company and materials relating to the
offer and sale of the Securities which have been requested by the Purchaser. The Purchaser has been afforded the opportunity to
ask questions of the executive officers and directors of the Company. The Purchaser understands that its investment in the Securities
involves a high degree of risk and it has sought such accounting, legal and tax advice as it has considered necessary to make an
informed investment decision with respect to the acquisition of the Securities.

 

(vi) The Purchaser understands
that no United States federal or state agency or any other government or governmental agency has passed on or made any recommendation
or endorsement of the Securities or the fairness or suitability of the investment in the Securities by the Purchaser nor have such
authorities passed upon or endorsed the merits of the offering of the Securities.

 

(vii) The Purchaser understands
that: (a) the Securities have not been and are not being registered under the Securities Act or any state securities laws, and
may not be offered for sale, sold, assigned or transferred unless (1) subsequently registered thereunder or (2) sold in reliance
on an exemption therefrom; (b) except as specifically set forth in the Registration Rights Agreement, neither the Company nor any
other person is under any obligation to register the Securities under the Securities Act or any state securities laws or to comply
with the terms and conditions of any exemption thereunder; and (c) Rule 144 adopted pursuant to the Securities Act will not be
available for resale transactions of Securities prior to a Business Combination and may not be available for resale transactions
of Securities after a Business Combination.

 

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(viii) The Purchaser
has such knowledge and experience in financial and business matters, knows of the high degree of risk associated with investments
in the securities of companies in the development stage such as the Company, is capable of evaluating the merits and risks of an
investment in the Securities and is able to bear the economic risk of an investment in the Securities in the amount contemplated
hereunder for an indefinite period of time. The Purchaser has adequate means of providing for its current financial needs and contingencies
and will have no current or anticipated future needs for liquidity which would be jeopardized by the investment in the Securities.
The Purchaser can afford a complete loss of its investment in the Securities.

 

Section 4. Conditions
of the Purchaser’s Obligations. The obligations of the Purchaser to purchase and pay for the Private Placement Warrants
are subject to the fulfillment, on or before each Closing Date, of each of the following conditions:

 

A. Representations
and Warranties. The representations and warranties of the Company contained in Section 2 shall be true and correct at and as
of such Closing Date as though then made.

 

B. Performance.
The Company shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that
are required to be performed or complied with by it on or before such Closing Date.

 

C. No Injunction.
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
or the Warrant Agreement.

 

D. Warrant Agreement.
The Company shall have entered into a Warrant Agreement with a warrant agent on terms satisfactory to the Purchaser.

 

Section 5. Conditions
of the Company’s Obligations. The obligations of the Company to the Purchaser under this Agreement are subject to the
fulfillment, on or before each Closing Date, of each of the following conditions:

 

A. Representations
and Warranties. The representations and warranties of the Purchaser contained in Section 3 shall be true and correct at and
as of such Closing Date as though then made.

 

B. Performance.
The Purchaser shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that
are required to be performed or complied with by the Purchaser on or before such Closing Date.

 

C. Corporate Consents.
The Company shall have obtained the consent of its Board of Directors authorizing the execution, delivery and performance of this
Agreement and the Warrant Agreement and the issuance and sale of the Private Placement Warrants hereunder.

 

D. No Injunction.
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
or the Warrant Agreement.

 

E. Warrant Agreement.
The Company shall have entered into a Warrant Agreement with a warrant agent on terms satisfactory to the Company.

 

Section 6. Termination.
This Agreement may be terminated at any time after September 30, 2019 upon the election by either the Company or the Purchaser
upon written notice to the other party if the closing of the Public Offering does not occur prior to such date.

 

    4

     

    

 

Section 7. Survival
of Representations and Warranties. All of the representations and warranties contained herein shall survive each Closing Date.

 

Section 8. Definitions.
Terms used but not otherwise defined in this Agreement shall have the meaning assigned to such terms in the Registration Statement.

 

Section 9. Miscellaneous.

 

A. Successors and
Assigns. Except as otherwise expressly provided herein, all covenants and agreements contained in this Agreement by or on behalf
of any of the parties hereto shall bind and inure to the benefit of the respective successors of the parties hereto whether so
expressed or not. Notwithstanding the foregoing or anything to the contrary herein, the parties may not assign this Agreement,
other than assignments by the Purchaser to affiliates thereof (including, without limitation, one or more of its members).

 

B. Severability.
Whenever possible, each provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable
law, but if any provision of this Agreement is held to be prohibited by or invalid under applicable law, such provision shall be
ineffective only to the extent of such prohibition or invalidity, without invalidating the remainder of this Agreement.

 

C. Counterparts.
This Agreement may be executed simultaneously in two or more counterparts, none of which need contain the signatures of more than
one party, but all such counterparts taken together shall constitute one and the same agreement.

 

D. Descriptive Headings;
Interpretation. The descriptive headings of this Agreement are inserted for convenience only and do not constitute a substantive
part of this Agreement. The use of the word “including” in this Agreement shall be by way of example rather than by
limitation.

 

E. Governing Law.
This Agreement shall be deemed to be a contract made under the laws of the State of New York and for all purposes shall be construed
in accordance with the internal laws of the State of New York.

 

F. Amendments.
This Agreement may not be amended, modified or waived as to any particular provision, except by a written instrument executed by
all parties hereto.

 

[Signature page follows]

 

    5

     

    

 

IN WITNESS WHEREOF,
the parties hereto have executed this Agreement to be effective as of the date first set forth above.

 

	 	COMPANY:
	 	 	 
	 	SWITCHBACK ENERGY ACQUISITION CORPORATION
	 	 	 
	 	By: 	 
	 	Name:	Jim Mutrie
	 	Title:	Chief Commercial Officers, General Counsel and Secretary
	 	 	 
	 	PURCHASER:
	 	 	 
	 	NGP SWITCHBACK, LLC
	 	 	 
	 	By: 	 
	 	Name:	Jim Mutrie
	 	Title:	Chief Commercial Officer, General Counsel and Secretary

  

[Signature Page to Private Placement
Warrants Purchase Agreement]

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