Document:

Exhibit
10.2

 

AGI
GUARANTY

 

This
Guaranty (this “Guaranty”) is made as of May 31, 2018, by Advanced Green Innovations, LLC, a Nevada limited
liability company (the “Guarantor”) and American Power Group Corporation, a Delaware corporation (the “Company”).
Capitalized terms used herein and not defined shall have the meanings assigned such terms in the Purchase Agreement (as defined
below).

 

R
E C I T A L S

 

WHEREAS,
pursuant to the terms of that certain Common Stock Purchase Agreement, dated as of the date hereof (the “Purchase Agreement”),
by and between Company and Dual Fuel, LLC, an Arizona limited liability company (the “Purchaser”), Company
shall, subject to the terms and conditions set forth therein, sell shares of Common Stock to Purchaser;

 

WHEREAS,
Purchaser will be receiving a substantial benefit from the consummation of the transactions contemplated by the Purchase Agreement;

 

WHEREAS,
Guarantor will derive a substantial benefit, through access to and distribution of Company’s technology, from the consummation
of the transactions contemplated by the Purchase Agreement;

 

WHEREAS,
the Purchase Agreement contains certain obligations of Purchaser to purchase additional shares of Common Stock of Company pursuant
to Section 2.3 thereof; and

 

WHEREAS,
this Guaranty and the agreements set forth herein are a material inducement to Company to enter into the Purchase Agreement.

 

A
G R E E M E N T S

 

NOW,
Therefore, for good and valuable consideration,
the receipt and sufficiency of which is hereby acknowledged, the parties hereto, intending to be legally bound, hereby agree as
follows:

 

		1.	To
                                         induce Company to enter into the Purchase Agreement, Guarantor hereby absolutely, unconditionally
                                         and irrevocably guarantees to Company the due and punctual payment of the Purchase Price
                                         Per Share for the additional shares to be purchased by Purchaser pursuant to Section
                                         2.3 of the Purchase Agreement (collectively, the “Obligations”).

 

		2.	This
                                         Guaranty is an absolute, irrevocable and unconditional guaranty and is enforceable against
                                         Guarantor at such time as the Purchaser fails to meet its Obligations, without the necessity
                                         for any suit or proceeding whatsoever against Purchaser, and without the necessity of
                                         any protest or notice of non-payment or of any notice of acceptance of this Guaranty
                                         or of any other notice or demand to which Guarantor might otherwise be entitled, all
                                         of which Guarantor hereby expressly waives to the extent permitted by applicable law.
                                         All payments that are due to Company hereunder from Guarantor shall be made by wire transfer
                                         of immediately available funds to the account(s) specified by Company. 

 

    	 

    	 

    

 

		3.	Guarantor
                                         agrees (a) that this Guaranty is a continuing guaranty of payment of the Purchase Price
                                         Per Share and (b) that the validity of this Guaranty and the obligations of Guarantor
                                         hereunder shall not be terminated, affected, diminished or impaired by reason of (i)
                                         the assertion or the failure of Company to assert against Purchaser any of the rights
                                         or remedies reserved to Company pursuant to the provisions of the Purchase Agreement
                                         or this Guaranty, (ii) any assignment, modification or amendment of the Purchase Agreement
                                         made in accordance with the terms thereof, including any extension of time thereunder,
                                         or (iii) any dealings or transactions whatsoever occurring between Company and Purchaser,
                                         whether or not notice thereof is given to Guarantor. The parties hereto acknowledge and
                                         agree that the rights and remedies provided herein are the exclusive rights and remedies
                                         that Company may otherwise have at law or in equity against Guarantor with respect to
                                         the Purchase Agreement, but shall not prejudice Company’s right to assert any other
                                         claim against Purchaser under the Purchase Agreement. 

 

		4.	Guarantor
                                         unconditionally and irrevocably agrees to not exercise any rights that it may now have
                                         or hereafter acquire with respect to the Obligations, including any right of subrogation,
                                         reimbursement, exoneration, contribution or indemnification and any right to participate
                                         in any claim or remedy of Company against Purchaser with respect to any of the Obligations,
                                         whether or not such claim, remedy or right arises in equity or under contract, statute,
                                         or common law, including the right to take or receive from Company, directly or indirectly,
                                         in cash or other property or by set-off or in any other manner, payment or security on
                                         account of such claim, remedy or right, unless and until all of the Obligations shall
                                         have been indefeasibly paid in full.

 

		5.	Guarantor
                                         hereby represents and warrants to Company that: (a) Guarantor has the power and authority
                                         to enter into this Guaranty and to perform the obligations contemplated hereby; (b) this
                                         Guaranty has been duly executed and delivered by Guarantor and constitutes a valid and
                                         binding obligation of Guarantor, enforceable against Guarantor in accordance with its
                                         terms, except as may be limited by applicable bankruptcy, insolvency, reorganization,
                                         moratorium or similar laws affecting creditors’ rights generally and subject to
                                         general principles of equity; (c) neither the execution, delivery and performance of
                                         this Guaranty by Guarantor nor the performance by Guarantor of the obligations contemplated
                                         hereby will (i) result in a violation or breach of or constitute a default under any
                                         of the terms, conditions or provisions of any contract or other agreement to which Guarantor
                                         is a party, or (ii) violate any order, writ, injunction or decree to which Guarantor
                                         is subject; and (d) Guarantor has the financial capacity to pay and perform its obligations
                                         under this Guaranty. The representations and warranties of Guarantor hereunder will indefinitely
                                         survive the entry into this Guaranty and the consummation of the Initial Closing.

 

		6.	This
                                         Guaranty may be amended, modified, or waived only with the written consent of the parties
                                         hereto.

 

		7.	All
                                         notices, requests, claims, demands and other communications hereunder shall be given
                                         in accordance with the terms of the Purchase Agreement.

 

		8.	This
                                         Guaranty and all of the provisions hereof shall be binding upon and inure to the benefit
                                         of the parties hereto, Company and its respective successors and permitted assigns. This
                                         Guaranty and the rights, interests and obligations hereunder may not be assigned by either
                                         party without the prior written consent of the other party.

 

		9.	This
                                         Guaranty may be executed in one or more counterparts, each of which shall be deemed to
                                         be an original but all of which shall constitute one and the same agreement. It is the
                                         express intent of the parties hereto to be bound by the exchange of signatures on this
                                         Guaranty via facsimile or electronic mail via portable document format (PDF). A facsimile
                                         or other copy of a signature shall be deemed an original.

 

    	 	2	 

    	 

    

 

		10.	This
                                         Guaranty shall be governed by and construed in accordance with the laws of the State
                                         of Delaware without regard to the principles of conflicts of law thereof.

 

		11.	EACH
                                         OF THE PARTIES HERETO HEREBY IRREVOCABLY AND UNCONDITIONALLY SUBMITS TO THE EXCLUSIVE
                                         JURISDICTION OF THE APPLICABLE STATE OR FEDERAL COURTS SITTING IN THE CITY OF BOSTON,
                                         MASSACHUSETTS FOR PURPOSES OF ALL LEGAL PROCEEDINGS ARISING OUT OF OR RELATING TO THIS
                                         AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY, AND EACH OF THE PARTIES HERETO AGREES
                                         NOT TO COMMENCE ANY LEGAL PROCEEDING RELATED THERETO EXCEPT IN SUCH COURTS. EACH OF THE
                                         PARTIES HERETO IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY LAW, ANY OBJECTION
                                         WHICH IT MAY NOW OR HEREAFTER HAVE TO THE LAYING OF THE VENUE OF ANY SUCH COURT OR THAT
                                         SUCH ACTION HAS BEEN BROUGHT IN AN INCONVENIENT FORUM.

 

		12.	THE
                                         PARTIES HERETO HEREBY KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVE, TO THE FULLEST
                                         EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT TO TRIAL BY JURY IN ANY ACTION OR PROCEEDING
                                         BROUGHT ON OR WITH RESPECT TO THIS GUARANTY, INCLUDING TO ENFORCE OR DEFEND ANY RIGHTS
                                         HEREUNDER, AND AGREE THAT ANY SUCH ACTION OR PROCEEDING SHALL BE TRIED BEFORE A COURT
                                         AND NOT BEFORE A JURY.

 

		13.	Any
                                         and all remedies expressly conferred upon a party to this Guaranty shall be cumulative
                                         with, and not exclusive of, any other remedy contained in this Guaranty, at law or in
                                         equity. The exercise (or partial exercise) by a party to this Guaranty of any one remedy
                                         shall not preclude the exercise by it of any other remedy contained in this Guaranty.
                                         

 

		14.	This
                                         Guaranty, the Purchase Agreement and the other agreements contemplated herein and therein
                                         set forth the entire understanding of the parties hereto relating to the subject matter
                                         hereof and supersede all prior agreements and understandings between any of such parties
                                         relating to the subject matter hereof.

		15.	With
                                         regard to each and every term and condition of this Guaranty, the parties hereto understand
                                         and agree that the same has been mutually negotiated, prepared and drafted, and if at
                                         any time they desire or are required to interpret or construe any such term or condition
                                         or any agreement or instrument subject hereto, no consideration shall be given to the
                                         issue of which of them actually prepared, drafted, authored or requested any term or
                                         condition of this Guaranty.

 

		16.	If
                                         any provision of this Guaranty or any part of any such provision is held under any circumstances
                                         to be invalid or unenforceable in any jurisdiction, then (a) such provision or part
                                         thereof shall, with respect to such circumstances and in such jurisdiction, be deemed
                                         amended to conform to applicable laws so as to be valid and enforceable to the fullest
                                         possible extent, (b) the invalidity or unenforceability of such provision or part
                                         thereof under such circumstances and in such jurisdiction shall not affect the validity
                                         or enforceability of such provision or part thereof under any other circumstances or
                                         in any other jurisdiction, and (c) the invalidity or unenforceability of such provision
                                         or part thereof shall not affect the validity or enforceability of the remainder of such
                                         provision or the validity or enforceability of any other provision of this Guaranty,
                                         and is separable from every other part of such provision.

 

*      *      *      *      *

 

    	 	3	 

    	 

    

 

IN
WITNESS WHEREOF, the parties hereto have executed this AGI Guaranty on the date first above written.

 

	 	GUARANTOR:

	 	 	 
	 	ADVANCED
    GREEN INNOVATIONS, LLC
	 	 	 
	 	By:	Cochise Investments, LLC
	 	Its:	Manager
	 	 	 
	 	By:
    	/s/
    Kenneth Losch
	 	Name:	Kenneth Losch
	 	Its:	Manager
	 	 	 
	 	Accepted
    and Agreed:
	 	 	 
	 	COMPANY:
	 	 	 
	 	AMERICAN
    POWER GROUP CORPORATION
	 	 
	 	By:
    	/s/ Charles E. Coppa
	 	Name:	Charles E. Coppa
	 	Title:	CEO and CFOExhibit
10.3

 

AMENDED
AND RESTATED VOTING AGREEMENT

 

THIS
AMENDED AND RESTATED VOTING AGREEMENT (the “Agreement”) is made and entered into as of this 31st
day of May, 2018 (the “Effective Date”) by and among (i) American Power Group Corporation, a Delaware corporation
(the “Company”), (ii) the holders of the Company’s Subordinated Contingent Convertible Promissory Notes
(the “Notes”), (iii) the holders of the Company’s 10% Convertible Preferred Stock (the “Series
A Preferred Stock”), Series D Convertible Preferred Stock (the “Series D Preferred Stock”), Series
D-2 Convertible Preferred Stock, Series D-3 Convertible Preferred Stock (all of such preferred stock, the “Preferred
Stock”) listed on Schedule A (collectively, the “Prior Investors”), (iv) the “Named
Stockholders” (as defined herein), and (v) Dual Fuel, LLC, an Arizona limited liability company (“Dual Fuel”
or the “Purchaser”, and, together with the Prior Investors, the “Stockholders”). Capitalized
terms used herein and not otherwise defined herein shall have the meanings set forth in the Purchase Agreement (as hereinafter
defined).

 

RECITALS

 

A.       Immediately
after the execution of this Agreement, the Company and Dual Fuel are entering into a Common Stock Purchase Agreement (the “Purchase
Agreement”) providing for the sale and purchase of shares of Common Stock of the Company.

 

B.
       The parties hereto desire to provide that (i) Dual Fuel shall be entitled to elect three
(3) directors of the Company and (ii) the holders of record of shares of Common Stock and of any other class or series of voting
stock, voting together as a single class, shall be entitled to elect the balance of the total number of directors of the Company.

 

C.       The
Company and the Prior Investors are parties to that certain Amended and Restated Voting Agreement dated as of January 27, 2017
(the “Original Agreement”), pursuant to which the election of certain members of the board of directors of
the Company (the “Board”) was governed.

 

D.       It
is a condition to the Purchaser’s obligations to purchase the Common Stock that certain Prior Investors convert outstanding
Preferred Stock into Common Stock immediately prior to the issuance of the Common Stock to the Purchaser (but after the execution
of this Agreement).

 

E.       It
is a condition to the Purchaser’s obligations to purchase the Common Stock that the Company and the Prior Investors execute
and deliver this Agreement for the purpose of amending and restating, in its entirety, the Original Agreement.

 

    	 

     

    

 

AGREEMENT

 

NOW,
THEREFORE, the parties agree amend and restate the Original Agreement, in its entirety, as follows:

 

1.                  
Voting Provisions Regarding Board of Directors.

 

1.1               
For purposes of this Agreement, the term “Shares” shall mean and include (i) any shares of Preferred Stock, by whatever
name called, now owned or subsequently acquired by a Stockholder, however acquired, whether through stock splits, stock dividends,
reclassifications, recapitalizations, similar events or otherwise; and (ii) any shares of Common Stock issued upon conversion
of any Shares of the Preferred Stock, including, without limitation, the shares of Common Stock issued in connection with the
conversion of the Preferred Stock by the Prior Investors as a condition to the issuance of Common Stock to the Purchaser pursuant
to the Purchase Agreement.

 

1.2               
Board Composition. From and after the Initial Closing, each Stockholder agrees to vote, or cause to be voted, all Shares
owned by such Stockholder, or over which such Stockholder has voting control, from time to time and at all times, in whatever
manner as shall be necessary, to fix the number of directors of the Company at five or at such other number as may be specified
by the Board, and to ensure that at each annual or special meeting of stockholders at which an election of directors is held or
pursuant to any written consent of the stockholders of the Company, the following persons shall be elected to the Board: 

 

(a)                
Until such time as Dual Fuel has been issued shares of Common Stock pursuant to the Purchase Agreement and thereafter so long
as Dual Fuel owns shares of Common Stock, three (3) individuals designated by Dual Fuel, who shall initially be Kenneth Losch,
Harry Kloor and Mark Killpack; 

 

(b)               
The Company’s Chief Executive Officer, who shall initially be Chuck Coppa (the “CEO Director”), provided
that if for any reason the CEO Director shall cease to serve as the Chief Executive Officer of the Company, each of the Stockholders
shall promptly vote their respective Shares (i) to remove the former Chief Executive Officer from the Board if such person has
not resigned as a member of the Board; and (ii) to elect such person’s replacement as Chief Executive Officer of the Company
as the new CEO Director ; and 

 

(c)                
Matt Van Steenwyk. 

 

To
the extent that any of the appointment rights set forth in clause (a) above shall no longer be applicable due to Dual Fuel no
longer holding Common Stock, any member of the Board who would otherwise have been designated in accordance with the terms thereof
shall instead be voted upon by all the holders of the Company’s Common Stock entitled to vote thereon in accordance with
the Company’s By-Laws and the Delaware General Corporation Law.

 

    	2

     

    

 

For
purposes of this Agreement, an individual, firm, corporation, partnership, association, limited liability company, trust or any
other entity (collectively, a “Person”) shall be deemed an “Affiliate” of another Person who, directly
or indirectly, controls, is controlled by or is under common control with such Person, including, without limitation, any general
partner, managing member, officer or director of such Person or any venture capital fund now or hereafter existing that is controlled
by one or more general partners or managing members of, or shares the same management company with, such Person.

 

1.3               
Failure to Designate a Board Member. In the absence of any designation from the Persons or groups with the right to designate
a director as specified above, the director previously designated by them and then serving shall be reelected if still eligible
to serve as provided herein.

 

1.4               
Removal of Board Members. Each Stockholder also agrees to vote, or cause to be voted, all Shares owned by such Stockholder,
or over which such Stockholder has voting control, from time to time and at all times, in whatever manner as shall be necessary
to ensure that:

 

(a)                
no director elected pursuant to Sections 1.2 or 1.3 of this Agreement may be removed from office unless: (i) such
removal is directed or approved by the affirmative vote of the Person, or of the holders of a majority of the shares of stock
(or each class of stock), entitled under Section 1.2 to designate that director, or (ii) the Person(s) originally entitled
to designate or approve such director or occupy such Board seat pursuant to Section 1.2) is no longer so entitled to designate
or approve such director or occupy such Board seat;

 

(b)               
any vacancies created by the resignation, removal or death of a director elected pursuant to Sections 1.2 or 1.3
shall be filled pursuant to the provisions of Section 1; and

 

(c)                
upon the request of any party or parties entitled to designate a director as provided in Section 1.2, to remove such director,
such director shall be removed.

 

All
Stockholders agree to execute any written consents required to perform the obligations of this Agreement, and the Company agrees
at the request of any party entitled to designate directors to call a special meeting of stockholders for the purpose of electing
directors.

 

1.5               
No Liability for Election of Recommended Directors. No party, nor any Affiliate of any such party, shall have any liability
as a result of designating a Person for election as a director for any act or omission by such designated Person in his or her
capacity as a director of the Company, nor shall any party have any liability as a result of voting for any such designee in accordance
with the provisions of this Agreement.

 

Voting
Provisions Regarding Restated Certificate of Incorporation. Each of the Named Stockholders (as hereinafter defined) agrees
to vote, or cause to be voted within three (3) calendar days after presentment of such vote, all Shares owned by such Named Stockholder,
or over which such Named Stockholder has voting control, to approve the Restated Certificate of Incorporation pursuant to Section
4.9 of the Purchase Agreement. For purposes hereof, each of Charles E. Coppa, Associated Private Equity, Arrow, LLC, the Van Steenwyk
Family Irrevocable Trust, the Matthew Donald Van Steenwyk GST Trust and the Van Steenwyk Issue Trust shall be deemed “Named
Stockholders”.

 

    	3

     

    

 

2.                  
Remedies.

 

2.1               
Covenants of the Company. The Company agrees to use its reasonable best efforts, within the requirements of applicable
law, to ensure that the rights granted under this Agreement are effective and that the parties enjoy the benefits of this Agreement.
Such actions include, without limitation, the use of the Company’s reasonable best efforts to cause the nomination and election
of the directors as provided in this Agreement.

 

2.2               
Irrevocable Proxy. Each party to this Agreement hereby constitutes and appoints the President of the Company, and each
member of the Board, and each of them, with full power of substitution, as the proxies of the party with respect to the matters
set forth herein, including without limitation, election of persons as members of the Board in accordance with Section 1
hereto and the approval of the Restated Certificate of Incorporation in accordance with Section 2 hereto, and hereby authorizes
each of them to represent and to vote, if and only if the party: (i) fails to vote, or (ii) attempts to vote (whether by proxy,
in person or by written consent), in a manner which is inconsistent with the terms of this Agreement, all of such party’s
Shares in favor of the election of persons as members of the Board determined pursuant to and in accordance with the terms and
provisions of this Agreement and in favor of the approval of the Restated Certificate of Incorporation. The proxy granted pursuant
to the immediately preceding sentence is given in consideration of the agreements and covenants of the Company and the parties
in connection with the transactions contemplated by this Agreement and, as such, is coupled with an interest and shall be irrevocable
unless and until this Agreement terminates. Each party hereto hereby revokes any and all previous proxies with respect to the
Shares and shall not hereafter, unless and until this Agreement terminates, purport to grant any other proxy or power of attorney
with respect to any of the Shares, deposit any of the Shares into a voting trust or enter into any agreement (other than this
Agreement), arrangement or understanding with any person, directly or indirectly, to vote, grant any proxy or give instructions
with respect to the voting of any of the Shares, in each case, with respect to any of the matters set forth herein.

 

2.3               
Specific Enforcement. Each party acknowledges and agrees that each party hereto will be irreparably damaged in the event
any of the provisions of this Agreement are not performed by the parties in accordance with their specific terms or are otherwise
breached. Accordingly, it is agreed that each of the Company and the Stockholders shall be entitled to an injunction to prevent
breaches of this Agreement and to specific enforcement of this Agreement and its terms and provisions in any action instituted
in any court of the United States or any state having subject matter jurisdiction.

 

2.4               
Remedies Cumulative. All remedies, either under this Agreement or by law or otherwise afforded to any party, shall be cumulative
and not alternative.

 

3.                  
Term. This Agreement shall be effective
as of the date hereof and shall continue in effect until and shall terminate upon the earlier to occur of (a) three (3) years
from the Effective Date; or (b) the termination of this Agreement in accordance with Section 5.7 below.

 

    	4

     

    

 

4.                  
Miscellaneous.

 

4.1               
Additional Parties. In the event that after the date of this Agreement, the Company enters into an agreement with any Person
to issue shares of Common Stock to such Person, the Company shall cause such Person, as a condition precedent to entering into
such agreement, to become a party to this Agreement by executing an Adoption Agreement, in the form attached hereto as Exhibit
A, agreeing to be bound by and subject to the terms of this Agreement as a Stockholder, along with the Spousal Waiver, as
applicable, attached to this Agreement as Exhibit B, and thereafter such person shall be deemed a Stockholder for all purposes
under this Agreement.

 

4.2               
Transfers. Each transferee or assignee of any Shares subject to this Agreement shall continue to be subject to the terms
hereof, and, as a condition precedent to the Company’s recognizing such transfer, each transferee or assignee shall agree
in writing to be subject to each of the terms of this Agreement by executing and delivering an Adoption Agreement substantially
in the form attached hereto as Exhibit A, along with the Spousal Waiver, attached to this Agreement as Exhibit B.
Upon the execution and delivery of an Adoption Agreement by any transferee and the Spousal Waiver by the transferee’s spouse,
such transferee shall be deemed to be a party hereto as if such transferee were the transferor and such transferee’s signature
appeared on the signature pages of this Agreement and shall be deemed to be a Stockholder. The Company shall not permit the transfer
of the Shares subject to this Agreement on its books or issue a new certificate representing any such Shares unless and until
such transferee shall have complied with the terms of this Section 5.2. Each certificate representing the Shares subject
to this Agreement if issued on or after the date of this Agreement shall be endorsed by the Company with the legend set forth
in Section 5.11.

 

4.3               
Successors and Assigns. The terms and conditions of this Agreement shall inure to the benefit of and be binding upon the
respective successors and assigns of the parties. Nothing in this Agreement, express or implied, is intended to confer upon any
party other than the parties hereto or their respective successors and assigns any rights, remedies, obligations, or liabilities
under or by reason of this Agreement, except as expressly provided in this Agreement.

 

4.4               
Jurisdiction; Governing Law. All questions concerning the construction, validity, enforcement and interpretation of this
Voting Agreement shall be determined in accordance with the provisions of the Purchase Agreement.

 

4.5               
Titles and Subtitles. The titles and subtitles used in this Agreement are used for convenience only and are not to be considered
in construing or interpreting this Agreement.

 

4.6               
Notices. Any notice, request or other document required or permitted to given or delivered to any party hereto shall be
delivered in accordance with the notice provisions of the Purchase Agreement. 

 

4.7               
Consent Required to Amend, Terminate or Waive. This Agreement may be amended or terminated and the observance of any term
hereof may be waived (either generally or in a particular instance and either retroactively or prospectively) only by a written
instrument executed by the Stockholders holding 67% of the Shares then held thereby. Notwithstanding the foregoing:

 

    	5

     

    

 

(i)                 
this Agreement may not be amended or terminated and the observance of any term of this Agreement may not be waived with respect
to any Stockholder without the written consent of such Stockholder unless such amendment, termination or waiver applies to all
Stockholders in the same fashion; 

 

(ii)               
the consent of the Stockholder shall not be required for any amendment or waiver if such amendment or waiver is not, directly
or indirectly, applicable to the rights of the Stockholder hereunder; and

 

(iii)             
any provision hereof may be waived by the waiving party on such party’s own behalf, without the consent of any other party.

 

In
addition, notwithstanding anything to the contrary contained herein, any provision of this Section 5.7 that requires a
particular Stockholder consent to a particular amendment may not be amended or terminated without the consent of such Stockholder.
The Company shall give prompt written notice of any amendment, termination or waiver hereunder to any party that did not consent
in writing thereto. Any amendment, termination or waiver effected in accordance with this Section 5.7 shall be binding
on each party and all of such party’s successors and permitted assigns, whether or not any such party, successor or assignee
entered into or approved such amendment, termination or waiver.

 

4.8               
Delays or Omissions. No delay or omission to exercise any right, power or remedy accruing to any party under this Agreement,
upon any breach or default of any other party under this Agreement, shall impair any such right, power or remedy of such non-breaching
or non-defaulting party nor shall it be construed to be a waiver of any such breach or default, or an acquiescence therein, or
of or in any similar breach or default thereafter occurring; nor shall any waiver of any single breach or default be deemed a
waiver of any other breach or default previously or thereafter occurring. Any waiver, permit, consent or approval of any kind
or character on the part of any party of any breach or default under this Agreement, or any waiver on the part of any party of
any provisions or conditions of this Agreement, must be in writing and shall be effective only to the extent specifically set
forth in such writing. All remedies, either under this Agreement or by law or otherwise afforded to any party, shall be cumulative
and not alternative.

 

4.9               
Severability. The invalidity or unenforceability of any provision hereof shall in no way affect the validity or enforceability
of any other provision.

 

4.10            
Entire Agreement. This Agreement (including the Exhibits hereto), and the other Transaction Documents (as defined in the
Purchase Agreement) constitute the full and entire understanding and agreement between the parties with respect to the subject
matter hereof, and any other written or oral agreements relating to the subject matter hereof existing between the parties (including,
without limitation, the Original Agreement) are expressly canceled.

 

    	6

     

    

 

4.11            
Legend on Share Certificates. Each certificate representing Shares issued after the date hereof shall be endorsed by the
Company with a legend reading substantially as follows:

 

“THE
SHARES EVIDENCED HEREBY ARE SUBJECT TO A VOTING AGREEMENT, AS MAY BE AMENDED FROM TIME TO TIME, (A COPY OF WHICH MAY BE OBTAINED
UPON WRITTEN REQUEST FROM THE COMPANY), AND BY ACCEPTING ANY INTEREST IN SUCH SHARES THE PERSON ACCEPTING SUCH INTEREST SHALL
BE DEEMED TO AGREE TO AND SHALL BECOME BOUND BY ALL THE PROVISIONS OF THAT VOTING AGREEMENT, INCLUDING CERTAIN RESTRICTIONS ON
TRANSFER AND OWNERSHIP SET FORTH THEREIN.”

 

The
Company, by its execution of this Agreement, agrees that it will cause the certificates evidencing the Shares issued after the
date hereof to bear the legend required by this Section 5.11 of this Agreement, and it shall supply, free of charge, a
copy of this Agreement to any holder of a certificate evidencing Shares upon written request from such holder to the Company at
its principal office. The parties to this Agreement do hereby agree that the failure to cause the certificates evidencing the
Shares to bear the legend required by this Section 5.11 herein and/or the failure of the Company to supply, free of charge,
a copy of this Agreement as provided hereunder shall not affect the validity or enforcement of this Agreement.

 

4.12            
Stock Splits, Stock Dividends, etc. In the event of any issuance of Shares of the Company’s voting securities hereafter
to any of the Stockholders (including, without limitation, in connection with any stock split, stock dividend, recapitalization,
reorganization, or the like), such Shares shall become subject to this Agreement and shall be endorsed with the legend set forth
in Section 5.11.

 

4.13            
Manner of Voting. The voting of Shares pursuant to this Agreement may be effected in person, by proxy, by written consent
or in any other manner permitted by applicable law.

 

4.14            
Further Assurances. At any time or from time to time after the date hereof, the parties agree to cooperate with each other,
and at the request of any other party, to execute and deliver any further instruments or documents and to take all such further
action as the other party may reasonably request in order to evidence or effectuate the consummation of the transactions contemplated
hereby and to otherwise carry out the intent of the parties hereunder.

 

4.15            
Costs of Enforcement. If any party to this Agreement seeks to enforce its rights under this Agreement by legal proceedings,
the non-prevailing party shall pay all costs and expenses incurred by the prevailing party, including, without limitation, all
reasonable attorneys’ fees.

 

4.16            
Counterparts. This Agreement may be executed and delivered in two or more counterparts, each of which shall be deemed an
original, but all of which together shall constitute one and the same instrument. Counterparts may be delivered via facsimile,
electronic mail (including pdf) or other transmission method and any counterpart so delivered shall be deemed to have been duly
and validly delivered to be valid and effective for all purposes.

 

4.17            
Aggregation of Stock. All Shares held or acquired by a Stockholder and/or its Affiliates shall be aggregated together for
the purpose of determining the availability of any rights under this Agreement, and such Affiliated persons may apportion such
rights as among themselves in any manner they deem appropriate.

 

[Signature
Page Follows]

 

    	7

     

    

 

IN
WITNESS WHEREOF, the parties have executed this Amended and Restated Voting Agreement as of the date first written above.

 

	AMERICAN
    POWER GROUP CORPORATION	 
	 	 	 
	By:	/s/
    Charles E. Coppa, CEO	 
	Name:	Charles
    E. Coppa, CEO	 
	 	 	 
	DUAL
    FUEL, LLC 	 
	 	 	 
	By:	/s/
    Kenneth Losch	 
	Name:	Kenneth
    Losch	 

 

	STOCKHOLDERS:	 	 
	 	 	 
	 	By: 	/s/
    Matthew Van Steenwyk
	 	Name: 	Matthew Van Steenwyk
	 	 	 
	 	Address:	 
	 	 	 
	 	 	 
	 	By: 	/s/
    Matthew Van Steenwyk
	 	Name: 	Van Steenwyk Family Irrevocable Trust
	 	 	 
	 	Address:	 
	 	 	 
	 	 	 
	 	By: 	/s/
    Matthew Van Steenwyk
	 	Name: 	Matthew Donald Van Steenwyk GST Trust
	 	 	 
	 	Address:	 
	 	 	 
	 	 	 
	 	By: 	/s/
    Matthew Van Steenwyk
	 	Name: 	Van Steewyk Issue Trust
	 	 	 
	 	Address:	 
	 	 	 
	 	 	 
	 	By: 	/s/
    Matthew Van Steenwyk
	 	Name: 	Arrow, LLC
	 	 	 
	 	Address:	 
	 	 	 
	 	 	 
	 	By: 	/s/
    Neil Braverman
	 	Name: 	Associated Private Equity
	 	 	 
	 	Address:	 
	 	 	 
	 	 	 
	 	By: 	/s/Charles
    E. Coppa
	 	Name: 	Charles E. Coppa
	 	 	 
	 	Address:	 
	 	 	 

 

    	8

     

    

 

SCHEDULE
A

 

LIST
OF PRIOR INVESTORS

 

[Intentionally
omitted]

 

    	9

     

    

 

EXHIBIT
A

 

ADOPTION
AGREEMENT

 

This
Adoption Agreement (this “Adoption Agreement”) is executed by the undersigned (the “Stockholder”)
pursuant to the terms of that certain Amended and Restated Voting Agreement dated as of __________, 2018 (the “Agreement”),
by and among American Power Group Corporation, a Delaware corporation (the “Company”) and certain of its stockholders,
as such Agreement may be amended or amended and restated hereafter. Capitalized terms used but not defined in this Adoption Agreement
shall have the respective meanings ascribed to such terms in the Agreement. By the execution of this Adoption Agreement, the Stockholder
agrees as follows.

 

1.                  
Acknowledgement. Stockholder acknowledges that Stockholder is acquiring certain shares of the Common Stock of the Company
(including options, warrants or other rights thereto, the “Securities”),
either as a transferee or as a party who has agreed to be bound by the terms of the Agreement.

 

2.                  
Agreement. Stockholder hereby (a) agrees that the Securities, and any other shares of Common Stock or securities required
by the Agreement to be bound thereby, shall be bound by and subject to the terms of the Agreement, (b) adopts the Agreement
with the same force and effect as if Stockholder were originally a party thereto; and (c) agrees to sign any and all documents
pertaining to the acquisition of Common Stock as the Company may reasonably request.

 

3.                  
Notice. Any notice required or permitted by the Agreement shall be given to Stockholder at the address or facsimile number
listed below Stockholder’s signature hereto.

 

	DATE: ________________________	 	STOCKHOLDER:	_______________________________________
	 	 	 	 
		 	By: 	 
		 	Name:	 
	 	 	 	 
		 	Address:	 
	 	 	 	 
	 	 	 	 
		 	Facsimile Number:
    	 

 

	ACCEPTED
    AND AGREED:	 
	 	 	 
	AMERICAN
    POWER GROUP CORPORATION	 
	 	 	 
	By:	 	 
	Name:	 	 
	Title:	 	 

 

    	 

     

    

 

EXHIBIT
B

 

CONSENT
OF SPOUSE

 

I,
____________________, spouse of ______________,
acknowledge that I have read the Amended and Restated Voting Agreement, dated as of _______________, 2018, to which this Consent
is attached as Exhibit B (the “Agreement”), and that I know the contents of the Agreement. I am
aware that the Agreement contains provisions regarding the voting of shares of capital stock of the Company that my spouse may
own, including any interest I might have therein.

 

I
hereby agree that my interest, if any, in any shares of capital stock of the Company subject to the Agreement shall be irrevocably
bound by the Agreement and further understand and agree that any community property interest I may have in such shares of capital
stock of the Company shall be similarly bound by the Agreement.

 

I
am aware that the legal, financial and related matters contained in the Agreement are complex and that I am free to seek independent
professional guidance or counsel with respect to this Consent. I have either sought such guidance or counsel or determined after
reviewing the Agreement carefully that I will waive such right.

 

	Dated:
    	 	 	 
	 	 	 	Name:

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