Document:

EX-10.2

 Exhibit 10.2 

STOCK OPTION PLAN OF 

SUNNOVA ENERGY INTERNATIONAL, INC. 

(As Amended and Restated Effective July 29, 2019) 

Sunnova Energy International Inc., a Delaware corporation (the “Company”), hereby adopts this amended and restated Stock
Option Plan of Sunnova Energy International Inc. (the “Plan”) as of July 29, 2019 (the “Effective Date”). The Plan was originally adopted as the Stock Option Plan of Sunnova Energy Corporation, and was amended
and restated and assumed by the Company in connection with the closing of the transactions contemplated by the Agreement and Plan of Merger, by and among the Company, Sunnova Energy Corporation and Sunnova Merger Sub Inc. dated as of the Effective
Date. The purposes of this Plan, as amended and restated, is to reflect the assumption of the Plan by the Company and to govern the administration of Options granted under the Plan prior to the Effective Date. 

ARTICLE I. 

DEFINITIONS 

Whenever the following terms are used in this Plan, they shall have the meaning specified below unless the context clearly indicates to the
contrary. The singular pronoun shall include the plural where the context so indicates. 
 Section 1.1
“Affiliate” shall mean, with respect to any Person, any other Person directly or indirectly controlling, controlled by, or under common control with, such Person where “control” shall have the meaning given such term under
Rule 405 of the Securities Act. 
 Section 1.2 “Board” shall mean the Board of Directors of
the Company. 
 Section 1.3 “Code” shall mean the Internal Revenue Code of 1986, as amended. 

Section 1.4 “Committee” shall mean the Compensation Committee of the Board. 

Section 1.5 “Common Stock” shall mean the common stock of the Company. 

Section 1.6 “Company” shall mean Sunnova Energy International Inc., a Delaware corporation. In
addition, “Company” shall mean any corporation assuming, or issuing new employee stock options in substitution for, Incentive Stock Options outstanding under the Plan in a transaction to which Section 424(a) of the Code applies. 

Section 1.7 “Consultant” shall mean any consultant or advisor if: (a) the consultant or
advisor renders bona fide services to the Company or any of its Subsidiaries; (b) the services rendered by the consultant or advisor are not in connection with the offer or sale of securities in a capital-raising transaction and do not
directly or indirectly promote or maintain a market for the Company’s securities; and (c) the consultant or advisor is a natural person who has contracted directly with the Company or any of its Subsidiaries to render such services. 

 Section 1.8 “Corporate Event” shall mean, as
determined by the Committee (or by the Board, in the case of Options granted to Independent Directors) in its sole discretion, any transaction or event described in Section 7.1(a) or any extraordinary or nonrecurring
transaction or event affecting the Company, any Affiliate of the Company, or the financial statements of the Company or any Affiliate of the Company, or any material change in applicable laws, regulations, or accounting principles. 

Section 1.9 “Director” shall mean a member of the Board. 

Section 1.10 “Effective Date” has the meaning set forth in the preamble. 

Section 1.11 “Eligible Representative” for an Optionee shall mean such Optionee’s personal
representative or such other person as is empowered under the deceased Optionee’s will or the then applicable laws of descent and distribution to represent the Optionee hereunder. 

Section 1.12 “Employee” shall mean, with respect to any entity, any employee of such entity (as
defined in accordance with the regulations and revenue rulings then applicable under Section 3401(c) of the Code). 

Section 1.13 “Equity Restructuring” means a non-reciprocal
transaction between the Company and its stockholders, such as a stock dividend, stock split, spin-off, rights offering or recapitalization through a large, nonrecurring cash dividend, that affects the number
or kind of shares of Common Stock (or other securities of the Company) or the share price of Common Stock (or other securities) and causes a change in the per share value of the Common Stock underlying outstanding Options. 

Section 1.14 “Exchange Act” shall mean the Securities Exchange Act of 1934, as amended. 

Section 1.15 “Fair Market Value” of a share of Common Stock as of a given date shall be: 

(a) the closing price of a share of Common Stock on the principal exchange on which such shares are then trading, if any (or as reported on any
composite index which includes such principal exchange), on the most recent trading day prior to such determination date; or 
 (b) if
Common Stock is not traded on an exchange, the mean between the closing representative bid and asked prices for a share of Common Stock on the most recent trading day prior to such determination date as reported by Nasdaq or, if Nasdaq is not then
in existence, by its successor quotation system; or 
 (c) if Common Stock is not publicly traded on an exchange and not quoted on Nasdaq or
a successor quotation system, the fair market value of a share of Common Stock as determined in good faith by the Board in its sole discretion. 

Section 1.16 “Incentive Stock Option” shall mean an Option that conforms to the applicable
provisions of Section 422 of the Code and that is designated as an Incentive Stock Option by the Committee. 

  
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 Section 1.17 “Independent Director” shall mean a
member of the Board who is not an Employee of the Company or any of its Subsidiaries. 
 Section 1.18
“Initial Public Offering” shall mean the first issuance by the Company of any class of common equity securities that is required to be registered (other than on a Form S-8) under
Section 12 of the Exchange Act. 
 Section 1.19 “Investors Agreement” shall mean that
certain Investors Agreement of Sunnova Energy International Inc., by and among the Company and certain other Persons, as it may be amended from time to time, which contains certain restrictions and limitations applicable to the shares of Common
Stock acquired upon Option exercise (and/or to other securities of the Company, if any, held by the Optionee during the term of such agreement), the terms of which shall be determined by the Board in its discretion. 

Section 1.20 “Non-Qualified Stock Option” shall mean an
Option which is not an “incentive stock option” within the meaning of Section 422 of the Code. 

Section 1.21 “Officer” shall mean an officer of the Company, as defined in Rule 16a-l(f) under the Exchange Act, as such Rule may be amended from time to time. 

Section 1.22 “Option” shall mean an option granted under the Plan to purchase Common Stock. Subject
to Section 3.2, an Option shall, as determined by the Committee, be either an Incentive Stock Option or a Non-Qualified Stock Option. 

Section 1.23 “Optionee” shall mean an Employee, Consultant or Independent Director to whom an
Option is granted under the Plan. 
 Section 1.24 “Person” shall mean an individual, partnership,
corporation, limited liability company, business trust, joint stock company, trust, unincorporated association, joint venture, governmental authority or other entity of whatever nature. 

Section 1.25 “Plan” shall mean this Stock Option Plan of Sunnova Energy International Inc., as
amended from time to time. 
 Section 1.26
“Rule 16b-3” shall mean Rule 16b-3 promulgated under the Exchange Act, as such Rule may be amended from time to time. 

Section 1.27 “Section 409A” shall have the meaning set forth in
Section 7.10. 
 Section 1.28 “Securities Act” shall mean the
Securities Act of 1933, as amended. 
 Section 1.29 “Stock Option Agreement” shall have the
meaning set forth in Section 4.1. 
 Section 1.30 “Subsidiary” of any
entity shall mean any corporation in an unbroken chain of corporations beginning with such entity if each of the corporations other than the last corporation in the unbroken chain then owns stock possessing fifty percent (50%) or more of the total
combined voting power of all classes of stock in one of the other corporations in such chain. 

  
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 Section 1.31 “Termination of Consultancy” shall
mean the time when the engagement of an Optionee as a Consultant to the Company or any of its Subsidiaries is terminated for any reason, with or without cause, including, but not by way of limitation, by resignation, discharge, death or retirement,
but excluding a termination where there is a simultaneous commencement of employment with the Company or any of its Subsidiaries. The Committee, in its sole discretion, shall determine the effect of all matters and questions relating to Termination
of Consultancy. 
 Section 1.32 “Termination of Directorship” shall mean the time when an
Optionee who is an Independent Director ceases to be a Director for any reason, including but not by way of limitation, a termination by resignation, failure to be elected or appointed, death or retirement. The Board, in its sole discretion, shall
determine the effect of all matters and questions relating to Termination of Directorship. 
 Section 1.33
“Termination of Employment” shall mean the time when the employee-employer relationship between an Optionee and the Company or one of its Subsidiaries, as applicable, is terminated for any reason, with or without cause, including,
but not by way of limitation, a termination by resignation, discharge, death or retirement, but excluding a termination where there is a simultaneous reemployment by the Company or one of its Subsidiaries, as applicable. The Committee shall
determine the effect of all matters and questions relating to Termination of Employment, including, but not by way of limitation, the question of whether a Termination of Employment resulted from a discharge for good cause, and all questions of
whether a particular leave of absence constitutes a Termination of Employment; provided, however, that, with respect to Incentive Stock Options, a leave of absence shall constitute a Termination of Employment if, and to the extent
that, such leave of absence interrupts employment for the purposes of Section 422(a)(2) of the Code and the then applicable regulations and revenue rulings under Section 422(a)(2) of the Code. 

ARTICLE II. 
 SHARES
SUBJECT TO PLAN 
 Section 2.1 Shares Subject to Plan. The shares of stock subject to Options shall
be shares of Common Stock and upon exercise of an Option such shares shall be subject to the restrictions, terms and conditions set forth in the Investors Agreement. Subject to Section 7.1, the aggregate number of such
shares which may be issued upon exercise of Options (including, without limitation, Incentive Stock Options) is 4,288,950 shares of Common Stock. 

Section 2.2 Unexercised Options. If any Option (or portion thereof) expires or is canceled without having
been fully exercised, the number of shares of Common Stock subject to such Option (or portion thereof), but as to which such Option was not exercised prior to its expiration or cancellation, may again be issued hereunder, subject to the limitations
of Section 2.1. 

  
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 ARTICLE III. 

GRANTING OF OPTIONS 

Section 3.1 Eligibility. Subject to Section 3.2, any (a) Employee of the
Company or one of its Subsidiaries; (b) Consultant; or (c) Independent Director shall be eligible to be granted Options. 

Section 3.2 Qualification of Incentive Stock Options. Notwithstanding Section 3.1,
the Committee may grant Options intended to qualify as Incentive Stock Options only to employees of the Company or any of the Company’s present or future “parent corporations” or “subsidiary corporations” as defined in
Sections 424(e) or (f) of the Code, respectively, and any other entities the employees of which are eligible to receive Incentive Stock Options under the Code. 

Section 3.3 Granting of Options to Employees and Consultants 

(a) The Committee shall from time to time: 

(i) select from among the Employees and Consultants of the Company and any of its Subsidiaries (including those to whom Options have been
previously granted under the Plan) such of them as in its opinion should be granted Options; 
 (ii) determine the number of shares of
Common Stock to be subject to such Options granted to such Employees and Consultants and, subject to Section 3.2, determine whether such Options are to be Incentive Stock Options or
Non-Qualified Stock Options; and 
 (iii) determine the terms and conditions of such Options,
consistent with the Plan. 
 (b) Upon the selection of an Employee or Consultant of the Company or any of its Subsidiaries to be granted an
Option pursuant to Section 3.3(a), the Committee shall instruct the corporate secretary or another authorized Officer of the Company to issue such Option and may impose such conditions on the grant of such Option as it
deems appropriate. Without limiting the generality of the preceding sentence, the Committee may require as a condition to the grant of an Option to such an Employee or Consultant that such Employee or Consultant surrender for cancellation some or
all of the unexercised Options which have been previously granted to him or her. An Option the grant of which is conditioned upon the surrender of unexercised Options may have an exercise price lower (or higher) than the exercise price of the
surrendered Option, may cover the same (or a lesser or greater) number of shares as the surrendered Option, may contain such other terms as the Committee deems appropriate and shall be exercisable in accordance with its terms, without regard to the
number of shares, price, period of exercisability or any other term or condition of the surrendered Option. 

  
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 Section 3.4 Granting of Option to Independent Directors

 (a) The Board shall from time to time: 

(i) select from among the Independent Directors (including those to whom Options have previously been granted under the Plan) such of them as
in its opinion should be granted Options; 
 (ii) determine the number of shares of Common Stock to be subject to such Options granted to
such selected Independent Directors; and 
 (iii) determine the terms and conditions of such Options, consistent with the Plan;
provided, however, that all Options granted to Independent Directors shall be Non-Qualified Stock Options. 

(b) Upon the selection of an Independent Director to be granted an Option pursuant to Section 3.4(a), the Board
shall instruct the corporate secretary or another authorized Officer of the Company to issue such Option and may impose such conditions on the grant of such Option as it deems appropriate. Without limiting the generality of the preceding sentence,
the Board may require as a condition to the grant of an Option to an Independent Director that the Independent Director surrender for cancellation some or all of the unexercised Options which have been previously granted to him or her. An Option the
grant of which is conditioned upon such surrender may have an exercise price lower (or higher) than the exercise price of the surrendered Option, may cover the same (or a lesser or greater) number of shares as the surrendered Option, may contain
such other terms as the Board deems appropriate and shall be exercisable in accordance with its terms, without regard to the number of shares, price, period of exercisability or any other term or condition of the surrendered Option. 

Section 3.5 No Further Grants. No Options may be granted under the Plan on or after the Effective Date. On
and after the Effective Date, the Plan exists solely to govern the administration of Options granted prior to the Effective Date. 

ARTICLE IV. 
 TERMS OF
OPTIONS 
 Section 4.1 Stock Option Agreement. Each Option shall be evidenced by a written Stock
Option Agreement, which shall be executed by the Optionee and an authorized Officer of the Company and which shall contain such terms and conditions as the Committee (or the Board, in the case of Options granted to Independent Directors) shall
determine, consistent with the Plan. Stock Option Agreements evidencing Incentive Stock Options shall contain such terms and conditions as may be necessary to qualify such Options as “incentive stock options” within the meaning of
Section 422 of the Code. 
 Section 4.2 Exercisability of Options 

(a) Each Option shall become exercisable according to the terms of the applicable Stock Option Agreement; provided, however,
that by a resolution adopted after an Option is granted, the Committee (or the Board, in the case of Options granted to Independent Directors) may, on such terms and conditions as it may determine to be appropriate, accelerate the time at which such
Option or any portion thereof may be exercised. 

  
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 (b) Except as otherwise provided in the applicable Stock Option Agreement or by action of
the Committee (or the Board, in the case of Options granted to Independent Directors) following the grant of the Option, (i) no portion of an Option that is unexercisable at Termination of Employment, Termination of Consultancy or Termination
of Directorship, as applicable, shall thereafter become exercisable and (ii) the portion of an Option that is unexercisable at Termination of Employment, Termination of Consultancy or Termination of Directorship shall automatically expire on
the date of such Termination of Employment, Termination of Consultancy or Termination of Directorship. 
 (c) To the extent that the
aggregate Fair Market Value of stock with respect to which “incentive stock options” (within the meaning of Section 422 of the Code, but without regard to Section 422(d) of the Code) are exercisable for the first time by an
Optionee during any calendar year (under the Plan and all other incentive stock option plans of the Company or any Subsidiary thereof) exceeds $100,000, such options shall be treated and taxable as
Non-Qualified Stock Options. The rule set forth in the preceding sentence shall be applied by taking options into account in the order in which they were granted, and the stock issued upon exercise of Options
shall designate whether such stock was acquired upon exercise of an Incentive Stock Option. For purposes of these rules, the Fair Market Value of stock shall be determined as of the date of grant of the Option granted with respect to such stock.

 Section 4.3 Exercise Price. The price of the shares subject to each Option shall be set by the Committee
(or the Board, in the case of Options granted to Independent Directors); provided, however, that in the case of an Incentive Stock Option, the price per share shall be not less than one hundred percent (100%) of the Fair Market Value
of such shares on the date such Option is granted (or the date such Option is modified, extended or renewed for purposes of Section 424(h) of the Code); and provided, further, that in the case of an Incentive Stock Option granted
to an individual then owning (within the meaning of Section 424(d) of the Code) more than ten percent (10%) of the total combined voting power of all classes of stock of the Company, the price per share shall not be less than one hundred and
ten percent (110%) of the Fair Market Value of such shares on the date such Incentive Stock Option is granted (or the date such Option is modified, extended or renewed for purposes of Section 424(h) of the Code). 

Section 4.4 Expiration of Options. No Option may be exercised to any extent by anyone after the first to
occur of the following events: 
 (a) the expiration of ten (10) years from the date the Option was granted; or 

(b) with respect to an Incentive Stock Option in the case of an Optionee owning (within the meaning of Section 424(d) of the Code), at
the time the Incentive Stock Option was granted, more than ten percent (10%) of the total combined voting power of all classes of stock of the Company or any of its Subsidiaries, the expiration of five (5) years from the date the Incentive
Stock Option was granted. 

  
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 A Stock Option Agreement may provide that an Option may not be exercised after such earlier date as may be
set forth in such Stock Option Agreement and, except as limited by the requirements of Section 409A or Section 422 of the Code and the regulations and rulings thereunder, and subject to the first sentence of this
Section 4.4, the Committee (or the Board, in the case of Options granted to Independent Directors) may extend the time during which an Option may be exercised in connection with any Termination of Employment, Termination of
Consultancy, Termination of Directorship or otherwise. 
 Section 4.5
At-Will Employment. Nothing in the Plan or in any Stock Option Agreement hereunder shall confer upon any Optionee any right to continue in the employ of, or as a Consultant for, the Company or any of
its Subsidiaries, or shall interfere with or restrict in any way the rights of the Company and any of its Subsidiaries, which are hereby expressly reserved, to discharge any Optionee at any time for any reason whatsoever, with or without cause,
except to the extent expressly provided otherwise in a written agreement between the Optionee and the Company or any of its Subsidiaries. 

ARTICLE V. 
 EXERCISE
OF OPTIONS 
 Section 5.1 Person Eligible to Exercise. During the lifetime of the Optionee, only he
or she may exercise an Option (or any portion thereof); provided, however, that the Optionee’s Eligible Representative may exercise such Optionee’s Option during the period of his or her disability (as defined in
Section 22(e)(3) of the Code) notwithstanding that an Option so exercised may not qualify as an Incentive Stock Option. After the death of the Optionee, any exercisable portion of an Option may, prior to the time when such portion becomes
unexercisable under the Plan or the applicable Stock Option Agreement, be exercised by his or her Eligible Representative. 

Section 5.2 Partial Exercise. At any time and from time to time prior to the time when the Option becomes
unexercisable under the Plan or the applicable Stock Option Agreement, the exercisable portion of an Option may be exercised in whole or in part; provided, however, that the Company shall not be required to issue fractional shares and
the Committee (or the Board, in the case of Options granted to Independent Directors) may, by the terms of the Stock Option Agreement, require any partial exercise to exceed a specified minimum number of shares. 

Section 5.3 Manner of Exercise. An exercisable Option, or any exercisable portion thereof, may be exercised
solely by delivery to the corporate secretary, the stock plan administrator of the Company or such other person or entity designated by the Committee (or the Board, in the case of Options granted to Independent Directors) of all of the following
prior to the time when such Option or such portion becomes unexercisable under the Plan or the applicable Stock Option Agreement: 
 (a)
notice in writing signed by the Optionee or his or her Eligible Representative, stating that such Option or portion is exercised, and specifically stating the number of shares with respect to which the Option is being exercised; 

  
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 (b) a copy of the Investors Agreement signed by the Optionee or Eligible Representative, as
applicable; 
 (c) full payment for the shares with respect to which such Option or portion is thereby exercised: 

(i) in cash or by personal, certified, or bank cashier check; 

(ii) in shares of Common Stock which have been owned by the Optionee for such minimum period of time, if any, as the Committee (or the Board,
in the case of Options granted to Independent Directors) may establish, duly endorsed for transfer to the Company with a Fair Market Value on the day prior to the date of delivery equal to the aggregate exercise price of the Option or exercised
portion thereof; 
 (iii) except with respect to Incentive Stock Options, in shares of the Common Stock issuable to the Optionee upon
exercise of the Option, with a Fair Market Value on the date of Option exercise equal to the aggregate exercise price of the shares with respect to which such Option or portion is thereby exercised; 

(iv) following an Initial Public Offering, by delivery of a notice that the Optionee has placed a market sell order with a broker with
respect to shares of Common Stock then issuable upon exercise of the Option, and that the broker has been directed to pay a sufficient portion of the net proceeds of the sale to the Company in satisfaction of the Option exercise price; or 

(v) in any combination of the consideration listed in this Section 5.3(c); 

(d) the payment to the Company (in cash or by personal, certified or bank cashier check or by any other means of payment approved by the
Committee) of all amounts necessary to satisfy any and all federal, state and local tax withholding requirements arising in connection with the exercise of the Option; 

(e) such representations and documents as the Committee (or the Board, in the case of Options granted to Independent Directors) deems
necessary or advisable to effect compliance with all applicable provisions of the Securities Act, Exchange Act and any other federal or state securities laws or regulations. The Committee (or the Board, in the case of Options granted to Independent
Directors) may, in its sole discretion, also take whatever additional actions it deems appropriate to effect such compliance, including, without limitation, placing legends on share certificates and issuing stop-transfer orders to transfer agents
and registrars; and 
 (f) in the event that the Option or portion thereof shall be exercised pursuant to
Section 5.1 by any person or persons other than the Optionee, appropriate proof of the right of such person or persons to exercise the Option or portion thereof. 

  
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 Section 5.4 Conditions to Issuance of Shares. The shares of
stock issuable and deliverable upon the exercise of an Option, or any portion thereof, may be either previously authorized but unissued shares or issued shares which have then been reacquired by the Company. The Administrator shall determine the
methods by which shares shall be delivered or deemed to be delivered to Optionees. Notwithstanding the above, the Company shall not be required to issue or deliver any certificate or certificates for shares of stock purchased upon the exercise of
any Option or portion thereof or make any book entries evidencing such shares prior to fulfillment of all of the following conditions: 
 (a)
the admission of such shares to listing on any and all stock exchanges on which such class of stock is then listed; 
 (b) the execution by
the Optionee and delivery to the Company of the Investors Agreement; 
 (c) the completion of any registration or other qualification of
such shares under any state or federal law or under the rulings or regulations of the Securities and Exchange Commission or any other governmental regulatory body, which the Committee (or the Board, in the case of Options granted to Independent
Directors) shall, in its sole discretion, deem necessary or advisable; 
 (d) the obtaining of any approval or other clearance from any
state or federal governmental agency which the Committee (or the Board, in the case of Options granted to Independent Directors) shall, in its sole discretion, determine to be necessary or advisable; and 

(e) the payment to the Company of all amounts which it is required to withhold under federal, state or local law in connection with the
exercise of the Option. 
 Section 5.5 Rights as Stockholders. The holder of an Option shall not be, nor
have any of the rights or privileges of, a stockholder of the Company in respect of any shares purchasable upon the exercise of any part of an Option unless and until (a) such holder has signed the Investors Agreement and (b) certificates
representing such shares have been issued by the Company to such holder or such holder otherwise becomes the record owner of such shares. 

Section 5.6 Transfer Restrictions. Shares acquired upon exercise of an Option shall be subject to the terms
and conditions of the Investors Agreement. In addition, the Committee (or the Board, in the case of Options granted to Independent Directors), in its sole discretion, may impose further restrictions on the transferability of the shares purchasable
upon the exercise of an Option as it deems appropriate. Any such restriction shall be set forth in the respective Stock Option Agreement and may be referred to on any certificates evidencing such shares. The Committee may require an Employee to give
the Company prompt notice of any disposition within two (2) years from the date of granting an Option (or the date the Option is modified, extended or renewed for purposes of Section 424(h) of the Code), or one (1) year after the date
of transfer of such shares to such Employee, of shares of stock acquired by exercise of an Incentive Stock Option. Such notice shall specify the date of such disposition or other transfer and the amount realized, in cash, other property, assumption
of indebtedness or other consideration, by the Optionee in such disposition or other transfer. The Committee may direct that any certificates evidencing shares acquired by exercise of an Incentive Stock Option refer to such requirement. 

  
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 ARTICLE VI. 

ADMINISTRATION 

Section 6.1 Committee. The full Board shall administer the Plan; provided that as of the Effective Date, the
Committee shall administer the Plan. Any action required or permitted to be taken by the Committee hereunder or under any Stock Option Agreement may be taken by the Board, except any actions with respect to matters that under Rule 16b-3 under the Exchange Act or any successor rule, or Section 162(m) of the Code, or any regulations or rules issued thereunder, or the rules of any securities exchange or automated quotation system on which
the shares of Common Stock are listed, quoted or traded are required to be determined in the sole discretion of the Compensation Committee. 

Section 6.2 Delegation of Authority. The Committee may, but need not, from time to time delegate some or all
of its authority to grant Options under the Plan to a committee or subcommittee consisting of one or more members of the Committee or of one or more Officers of the Company; provided, however, that the Committee may not delegate its
authority to grant Options to individuals (a) who are subject on the date of the grant to the reporting rules under Section 16(a) of the Exchange Act, (b) whose compensation the Committee determines is, or may become, subject to the
deduction limitations set forth in Section 162(m) of the Code or (c) who are Officers of the Company who are delegated authority by the Committee hereunder; provided further that any delegation of administrative authority
shall be permitted only to the extent it is permissible under the Committee’s charter or other organizational documents and applicable law. Any delegation hereunder shall be subject to the restrictions and limits that the Committee specifies at
the time of such delegation or that are otherwise included in the applicable organizational documents of the Committee, and the Committee may at any time rescind the authority so delegated or appoint a new delegatee. At all times, the delegatee
appointed under this Section 6.2 shall serve in such capacity at the pleasure of the Committee. 

Section 6.3 Duties and Powers of the Committee. It shall be the duty of the Committee to conduct the general
administration of the Plan in accordance with its provisions. The Committee shall have the power to interpret the Plan and the Options and to adopt such rules for the administration, interpretation and application of the Plan as are consistent
therewith and to interpret, amend or revoke any such rules. Notwithstanding the foregoing, the full Board, acting by a majority of its members in office, shall conduct the general administration of the Plan with respect to Options granted to
Independent Directors. Any such interpretations and rules in regard to Incentive Stock Options shall be consistent with the terms and conditions applicable to “incentive stock options” within the meaning of Section 422 of the Code.
All determinations and decisions made by the Committee under any provision of the Plan or of any Option granted thereunder shall be final, conclusive and binding on all persons. 

Section 6.4 Compensation, Professional Assistance, Good Faith Actions. The members of the Committee shall
receive such compensation, if any, for their services hereunder as may be determined by the Board. All expenses and liabilities incurred by the members of the Committee or the Board in connection with the administration of the Plan shall be borne by
the Company. The Committee or the Board may employ attorneys, consultants, accountants, appraisers, brokers or other persons. The Committee, the Company and its Officers and Directors 

  
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shall be entitled to rely upon the advice, opinions or valuations of any such persons. All actions taken and all interpretations and determinations made by the Committee and the Board in good
faith shall be final and binding upon all Optionees, the Company and all other interested persons. No member of the Committee or the Board shall be personally liable for any action, determination or interpretation made in good faith with respect to
the Plan or the Options, and all members of the Committee and the Board shall be fully protected by the Company with respect to any such action, determination or interpretation. 

ARTICLE VII. 
 OTHER
PROVISIONS 
 Section 7.1 Changes in Common Stock; Disposition of Assets and Corporate Events 

(a) Subject to Section 7.1(e), in the event that the Committee (or the Board, in the case of Options granted to
Independent Directors) determines that any dividend or other distribution (whether in the form of cash, Common Stock, other securities, or other property), recapitalization, reclassification, stock split, reverse stock split, reorganization, merger,
consolidation, split-up, spin-off, combination, repurchase, liquidation, dissolution, or sale, transfer, exchange or other disposition of all or substantially all of the
assets of the Company, or exchange of Common Stock or other securities of the Company, issuance of warrants or other rights to purchase Common Stock or other securities of the Company, or other similar corporate transaction or event (other than an
Equity Restructuring), in the Committee’s sole discretion (or in the case of Options granted to Independent Directors, the Board’s sole discretion), affects the Common Stock such that an adjustment is determined by the Committee (or the
Board, in the case of Options granted to Independent Directors) to be appropriate in order to prevent dilution or enlargement of the benefits or potential benefits intended to be made available under the Plan or with respect to an Option, then the
Committee (or the Board, in the case of Options granted to Independent Directors) shall, in such manner as it may deem equitable, adjust any or all of: 

(i) the number and kind of shares of Common Stock (or other securities or property) with respect to which Options may be granted under the
Plan (including, but not limited to, adjustments of the limitations in Section 2.1 on the maximum number and kind of shares which may be issued); 

(ii) the number and kind of shares of Common Stock (or other securities or property) subject to outstanding Options; 

(iii) the exercise price with respect to any Option; and 

(iv) the terms and conditions of outstanding Options, including any financial or other “targets” specified in each Stock Option
Agreement for determining the exercisability of Options. 
 (b) Subject to Section 7.1(e) and the terms of
outstanding Stock Option Agreements, upon the occurrence of a Corporate Event (other than an Equity Restructuring), the Committee (or the Board, in the case of Options granted to Independent Directors), in its sole discretion, and on such terms and
conditions as it deems appropriate, either by the terms of the Option or by action taken prior to the occurrence of such Corporate Event, is hereby authorized 

  
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to take any one or more of the following actions whenever the Committee (or the Board, in the case of Options granted to Independent Directors) determines that such action is appropriate in order
to prevent dilution or enlargement of the benefits or potential benefits intended to be made available under the Plan or with respect to any Option under this Plan, to facilitate such Corporate Event or to give effect to such changes in laws,
regulations or principles: 
 (i) To provide for the termination of any such Option in exchange for an amount of cash, securities and/or
other property with a value equal to the amount that could have been attained upon the exercise of the vested portion of such Option (and such additional portion of the Option as the Board or Committee may determine) immediately prior to the
occurrence of such transaction or event (and, for the avoidance of doubt, if as of the date of the occurrence of such transaction or event, the Committee (or the Board, in the case of Options granted to Independent Directors) determines in good
faith that no amount would have been obtained upon the exercise of such Option, then the Option may be terminated by the Company without payment); 

(ii) To replace the Option with other rights or property of not less than equal intrinsic value selected by the Board or Committee; 

(iii) To provide that the Option (or any portion thereof) cannot be exercised after such event; 

(iv) To provide that for a specified period of time prior to such Corporate Event, such Option shall be exercisable as to all shares covered
thereby or a specified portion of such shares, notwithstanding anything to the contrary in this Plan or the applicable Stock Option Agreement; 

(v) To provide that upon the Corporate Event, such Option (or any portion thereof) shall be assumed by the successor or survivor corporation,
or a parent or subsidiary thereof (including without limitation any common parent of the Company and any other company or companies), or shall be substituted for by similar options, rights or awards of not less than equal intrinsic value covering
the stock of the successor or survivor corporation, or a parent or subsidiary thereof (including without limitation any common parent of the Company and any other company or companies), with appropriate adjustments as to the number and kind of
shares and exercise prices, as determined by the Board or the Committee; and 
 (vi) To make adjustments in the number and type of shares
of Common Stock (or other securities or property) subject to outstanding Options (or any portion thereof) and/or in the terms and conditions of (including the exercise price), and the criteria included in, outstanding Options and Options which may
be granted in the future. 
 (c) In connection with the occurrence of any Equity Restructuring, and notwithstanding anything to the contrary
in Section 7.1(a) and Section 7.1(b): 
 (i) The number and type of securities subject
to each outstanding Option, and the exercise price thereof, shall be equitably adjusted so that the intrinsic value of each such Option and the proportionate interest represented thereby immediately after the Equity Restructuring will equal the
intrinsic value of such Option and the proportionate interest represented thereby immediately prior to such Equity Restructuring. The adjustments provided under this Section 7.1(c)(i) shall be nondiscretionary and shall be
final and binding on the affected Optionees and the Company; and 

  
 13 

 (ii) The Committee (or the Board, in the case of Options granted to Independent Directors)
shall make such proportionate adjustments, if any, as the Committee (or the Board, in the case of Options granted to Independent Directors) in its discretion may deem appropriate to reflect such Equity Restructuring with respect to the aggregate
number and kind of shares that may be issued under the Plan. 
 (d) Subject to Section 7.1(e), the Committee (or
the Board, in the case of Options granted to Independent Directors) may, in its sole discretion, include such further provisions and limitations in any Stock Option Agreement as it may deem equitable and in the best interests of the Company and its
Affiliates. 
 (e) With respect to Incentive Stock Options, no adjustment or action described in this Section 7.1
or in any other provision of the Plan shall be authorized to the extent that such adjustment or action would cause the Plan to violate Section 422(b)(1) of the Code or any successor provisions thereto, unless the Committee determines that the
Plan and/or the Options are not to comply with Section 422(b)(1) of the Code. No adjustment or action described in this Section 7.1 or in any other provision of the Plan shall be authorized to the extent that such adjustment or action
would cause an Option to fail to be exempt from or comply with Section 409A, except as otherwise determined by the Committee (or the Board, in the case of Options granted to Independent Directors). 

Section 7.2 Options Not Transferable. No Option or interest or right therein or part thereof shall be liable
for the debts, contracts or engagements of the Optionee or his or her successors in interest or shall be subject to disposition by transfer, alienation, anticipation, pledge, encumbrance, assignment or any other means whether such disposition be
voluntary or involuntary or by operation of law, by judgment, levy, attachment, garnishment or any other legal or equitable proceedings (including bankruptcy), and any attempted disposition thereof shall be null and void and of no effect;
provided, however, that nothing in this Section 7.2 shall prevent transfers by will or by the applicable laws of descent and distribution. 

Section 7.3 Amendment, Suspension or Termination of the Plan. The Plan may be wholly or partially amended or
otherwise modified, suspended or terminated at any time or from time to time by the Board or the Committee. However, without stockholder approval within twelve (12) months before or after such action, no action of the Board or the Committee
may, except as provided in Section 7.1, increase any limit imposed in Section 2.1 on the maximum number of shares which may be issued on exercise of Options, reduce the minimum exercise price
requirements of Section 4.3, or extend the limit imposed in this Section 7.3 on the period during which Options may be granted. Except as provided by Section 7.1, neither
the amendment, suspension nor termination of the Plan shall, without the consent of the holder of the Option, alter or impair any rights or obligations under any Option theretofore granted. No Option may be granted during any period of suspension
nor after termination of the Plan, and in no event may any Option be granted under this Plan after the expiration of ten (10) years from the date the Plan is adopted by the Board. 

  
 14 

 Section 7.4 Effect of Plan Upon Other Option and Compensation
Plans. The adoption of this Plan shall not affect any other compensation or incentive plans in effect for the Company or its Affiliates. Nothing in this Plan shall be construed to limit the right of the Company or its Affiliates (a) to
establish any other forms of incentives or compensation for directors or employees of the Company or its Affiliates, or (b) to grant or assume options otherwise than under this Plan in connection with any proper corporate purpose, including,
but not by way of limitation, the grant or assumption of options in connection with the acquisition by purchase, lease, merger, consolidation or otherwise, of the business, stock or assets of any corporation, firm or association. 

Section 7.5 Approval of Plan by Stockholders. This Plan was approved by the Company’s stockholders
within twelve (12) months after the date of the Board’s initial adoption of this Plan. 
 Section 7.6
Titles. Titles are provided herein for convenience only and are not to serve as a basis for interpretation or construction of the Plan. 

Section 7.7 Conformity to Securities Laws. The Plan is intended to conform to the extent necessary with all
provisions of (a) the Securities Act and the Exchange Act and any and all regulations and rules promulgated by the Securities and Exchange Commission thereunder, and (b) any applicable state and local securities laws and any and all
regulations and rules promulgated by any applicable state or local regulatory authority thereunder, in each case to the extent the Company or any Optionee is subject to the provisions thereof. Notwithstanding anything herein to the contrary, the
Plan shall be administered, and Options shall be granted and may be exercised, only in such a manner as to conform to such laws, rules and regulations. To the extent permitted by applicable law, the Plan and Options granted hereunder shall be deemed
amended to the extent necessary to conform to such laws, rules and regulations. 
 Section 7.8 Governing
Law. To the extent not preempted by federal law, the Plan shall be construed in accordance with and governed by the internal laws of the State of Delaware, without regard to the principles of conflicts of law thereof, or principles of conflicts
of law of any other jurisdiction which could cause the application of the laws of any jurisdiction other than the State of Delaware. 

Section 7.9 Severability. In the event any portion of the Plan or any action taken pursuant thereto shall be
held illegal or invalid for any reason, the illegality or invalidity shall not affect the remaining parts of the Plan, and the Plan shall be construed and enforced as if the illegal or invalid provisions had not been included, and the illegal or
invalid action shall be null and void. 
 Section 7.10 Section 409A. To the extent
applicable, the Plan and Stock Option Agreements shall be interpreted in accordance with Section 409A of the Code and the Department of Treasury regulations and other interpretive guidance issued thereunder, including, without limitation, any
such regulations or other guidance that may be issued after the date hereof (collectively, “Section 409A”). Notwithstanding any provision of the Plan to the contrary, if at any time the Committee determines that
any Option (or any portion thereof) may be subject to Section 409A, the Committee shall have the right in its sole discretion (without any obligation to do so or to indemnify any Optionee or any other Person for failure to do so) (a) to
adopt such 

  
 15 

 
amendments to the Plan or the applicable Stock Option Agreement or adopt such other policies and procedures (including amendments, policies and procedures with retroactive effect) that it
determines are necessary or appropriate to preserve the intended tax treatment of the benefits provided with respect to the Option, to preserve the economic benefits thereof or to avoid less favorable accounting or tax consequences for the Company
and/or (b) to take any other actions that it determines are necessary or appropriate to exempt the Option from Section 409A or to comply with the requirements of Section 409A and thereby avoid the application of penalty taxes
thereunder. Notwithstanding anything herein to the contrary, no provision of the Plan shall be interpreted or construed to transfer any liability for failure to comply with the requirements of Section 409A from any Optionee or any other Person
to the Company or any of its Affiliates, employees or agents. 
 * * * * * 

[Stock Option Plan of Sunnova Energy International Inc.] 

  
 16 

 SUNNOVA ENERGY INTERNATIONAL INC. 

STOCK OPTION PLAN 

CALIFORNIA SUPPLEMENT 
 The
Committee has adopted this supplement for purposes of satisfying the requirements of Section 25102(o) of the California Corporations Code and the regulations issued thereunder (“Section 25102(o)”).
Notwithstanding anything to the contrary contained in the Plan and except as otherwise determined by the Committee, the provisions set forth in this supplement shall apply to all Options granted under the Plan to an Optionee who is a resident of the
State of California on the date of grant (a “California Optionee”) and which are intended to be exempt from registration in California pursuant to Section 25102(o). This supplement shall not apply to Options granted to
California Optionees on or after an Initial Public Offering. Definitions in the Plan are applicable to this supplement. 
 1. Additional
Limitations On Options. 
 (a) Maximum Duration of Options. No Options granted to California Optionees will be granted for a term
in excess of ten (10) years. 
 (b) Minimum Exercise Period Following Termination. Unless a California Optionee’s employment
or service relationship is terminated for Cause (as defined in the Investors Agreement), in the event of termination of such Optionee’s employment or service relationship, to the extent required by applicable law, he or she shall have the right
to exercise an Option, to the extent that he or she was otherwise entitled to exercise such Option on the date employment terminated, as follows: (i) at least six (6) months from the date of termination, if termination was caused by such
Optionee’s death or Disability (as defined in the Investors Agreement) and (ii) at least thirty (30) days from the date of termination, if termination was caused other than by such Optionee’s death or Disability. 

(c) The terms of all Options granted to California Optionees shall comply, to the extent applicable, with Section 260.140.41 or
Section 260.140.42 of the California Code of Regulations. 
 2. Adjustments. The Committee will make such adjustments to an
Option held by a California Optionee as may be required by Section 260.140.41 or Section 260.140.42 of the California Code of Regulations. 

3. Additional Requirement To Provide Information To California Optionees. To the extent required by Section 260.140.46 of the
California Code of Regulations (or any successor provision thereto), the Company shall provide to each California Optionee and to each California Optionee who acquires Common Stock pursuant to the Plan, not less frequently than annually, copies of
annual financial statements (which need not be audited). The Company shall not be required to provide such statements to key persons whose duties in connection with the Company assure their access to equivalent information. In addition, this
information requirement shall not apply to the Plan to the extent that it complies with all conditions of Rule 701 of the Securities Act (“Rule 701”) as determined by the Committee; provided that for purposes of determining such
compliance, any registered domestic partner shall be considered a “family member” as that term is defined in Rule 701. 
 4.
Stockholder Approval; Additional Limitations On Timing Of Awards. The Plan was approved by the Company’s stockholders within twelve (12) months after the date of the Board’s adoption of the Plan.EX-10.3

 Exhibit 10.3 

SUNNOVA ENERGY INTERNATIONAL INC. 

2019 LONG-TERM INCENTIVE PLAN 
 1.
Plan. This Sunnova Energy International Inc. 2019 Long-Term Incentive Plan (this “Plan”) was adopted by Sunnova Energy International Inc. to reward and provide incentives to certain employees and directors by enabling them to
acquire awards related to shares of common stock of Sunnova Energy International Inc. 
 2. Definitions. As used herein, the terms set forth below
shall have the following respective meanings: 
 “Affiliate” has the meaning ascribed to such term in Rule
12b-2 of the General Rules and Regulations of the Exchange Act. 
 “Award” means the grant of any
Option, SAR, Stock Award, Cash Award or Performance Award whether granted singly, in combination or in tandem, to a Participant pursuant to such applicable terms, conditions and limitations as the Committee may establish in order to fulfill the
objectives of this Plan. 
 “Award Agreement” means the document (in written or electronic form) setting forth the terms, conditions and
limitations applicable to an Award. Such agreement shall be written except that the Committee may, in its discretion, require or allow that the Participant electronically execute or accept such Award Agreement, or may adopt procedures for deemed
acceptance of an Award without formal written or electronic acceptance. The Award Agreement is subject to the terms and conditions of the Plan. 

“Board” means the Board of Directors of the Company. 

“Cash Award” means an Award denominated in cash. 

“Change in Control” means each of the following: 

(i) The acquisition after the date hereof by any individual, entity or group (within the meaning of Section 13(d)(3) or 14(d)(2) of the Exchange Act) (a
“Person”) of beneficial ownership (within the meaning of Rule 13d-3 promulgated under the Exchange Act) of 20% or more of either (1) the then outstanding shares of common stock of the Company
(the “Outstanding Company Common Stock”) or (2) the combined voting power of the then outstanding voting securities of the Company entitled to vote generally in the election of directors (the “Outstanding Company Voting
Securities”); provided, however, that the following acquisitions shall not constitute a Change in Control: (A) any acquisition directly from the Company, (B) any acquisition by the Company, (C) any acquisition by any employee
benefit plan (or related trust) sponsored or maintained by the Company or any corporation controlled by the Company, (D) any acquisition previously approved by at least a majority of the members of the Incumbent Board (as such term is
hereinafter defined), (E) any acquisition approved by at least a majority of the members of the Incumbent Board within five business days after the Company has notice of such acquisition, or (F) any acquisition by any corporation pursuant to a
transaction which complies with clauses (1), (2), and (3) of subsection (iii) of this definition; or 
 (ii) Individuals who, as of the date
hereof, constitute the Board (the “Incumbent Board”) cease for any reason to constitute at least a majority of the Board; provided, however, that any individual becoming a director subsequent to the date hereof whose election, appointment
or nomination for election by the Company’s shareholders, was approved by a vote of at least a majority of the directors then comprising the Incumbent Board shall be considered as though such individual were a member of the Incumbent Board, but
excluding, for purposes of this definition, any such individual whose initial assumption of office occurs as a result of an actual or threatened election contest with respect to the election or removal of directors or other actual or threatened
solicitation of proxies or consents by or on behalf of a Person other than the Board; or 

 (iii) The consummation of a reorganization, share exchange, merger (a “Business Combination”), in
each case, unless, following such Business Combination, (1) all or substantially all of the individuals and entities who were the beneficial owners, respectively, of the Outstanding Company Common Stock and Outstanding Company Voting Securities
immediately prior to such Business Combination will beneficially own, directly or indirectly, more than 70% of, respectively, the then outstanding shares of common stock and the combined voting power of the then outstanding voting securities
entitled to vote generally in the election of directors, as the case may be, of the corporation resulting from such Business Combination (including, without limitation, a corporation which as a result of such transaction will own the Company through
one or more subsidiaries) in substantially the same proportions as their ownership, immediately prior to such Business Combination of the Outstanding Company Common Stock and Outstanding Company Voting Securities, as the case may be, (2) no
Person (excluding any employee benefit plan (or related trust) of the Company or such corporation resulting from such Business Combination) will beneficially own, directly or indirectly, 20% or more of, respectively, the then outstanding shares of
common stock of the corporation resulting from such Business Combination or the combined voting power of the then outstanding voting securities of such corporation except to the extent that such ownership existed prior to the Business Combination,
and (3) at least a majority of the members of the board of directors of the corporation resulting from such Business Combination were members of the Incumbent Board at the time of the execution of the initial agreement, or of the action of the
Board, providing for such Business Combination or were elected, appointed or nominated by the Board; or 
 (iv) (1) Approval by the shareholders of the
Company of a complete liquidation or dissolution of the Company or (2) the sale or other disposition of all or substantially all of the assets of the Company, other than to a corporation, with respect to which following such sale or other
disposition, (A) more than 70% of, respectively, the then outstanding shares of common stock of such corporation and the combined voting power of the then outstanding voting securities of such corporation entitled to vote generally in the
election of directors is then beneficially owned, directly or indirectly, by all or substantially all of the individuals and entities who were the beneficial owners, respectively, of the Outstanding Company Common Stock and Outstanding Company
Voting Securities immediately prior to such sale or other disposition in substantially the same proportion as their ownership, immediately prior to such sale or other disposition, of the Outstanding Company Common Stock and Outstanding Company
Voting Securities, as the case may be, (B) less than 20% of, respectively, the then outstanding shares of common stock of such corporation and the combined voting power of the then outstanding voting securities of such corporation entitled to
vote generally in the election of directors will be beneficially owned, directly or indirectly, by any Person (excluding any employee benefit plan (or related trust) of the Company or such corporation), except to the extent that such Person owned
20% or more of the Outstanding Company Common Stock or Outstanding Company Voting Securities prior to the sale or disposition, and (C) at least a majority of the members of the board of directors of such corporation were members of the
Incumbent Board at the time of the execution of the initial agreement, or of the action of the Board, providing for such sale or other disposition of assets of the Company or were elected, appointed or nominated by the Board. 

“Code” means the Internal Revenue Code of 1986, as amended from time to time. Reference to a specific section of the Code or regulation
thereunder will include such section or regulation, any valid regulation promulgated under such section, and any comparable provision of any future legislation or regulation amending, supplementing or superseding such section or regulation. 

“Committee” means (i) the Compensation Committee of the Board or (ii) such other committee of the Board as is designated by the
Board to administer this Plan or (iii) to the extent contemplated hereby, the Board. 
 “Common Stock” means the common stock, par
value $0.0001 per share, of the Company. 
 “Company” means Sunnova Energy International Inc., a Delaware corporation. 

“Consultant” means any natural person, including an advisor, engaged by the Company or Subsidiary to render bona fide services to such
entity, provided the services (i) are not in connection with the offer or sale of securities in a capital-raising transaction, and (ii) do not directly promote or maintain a market for the Company’s securities, in each case,
within the meaning of Form S-8 promulgated under the Securities Act, and provided, further, that a Consultant will include only those persons to whom the issuance of Shares may be registered under Form S-8 promulgated under the Securities Act. 
 “Director” means an individual serving as a
member of the Board. 

 “Dividend Equivalents” means, with respect to the shares of Common Stock subject to a Stock
Award other than Restricted Stock, an amount equal to all dividends and other distributions (or the economic equivalent thereof) that are payable to stockholders of record during the Restriction Period on a like number of shares of Common Stock.

 “Employee” means an employee of the Company or any of its Subsidiaries. 

“Exchange Act” means the Securities Exchange Act of 1934, as amended from time to time. 

“Fair Market Value” means, as of any date, the value of a share, determined as follows: 

(i) If the Common Stock is listed on any established stock exchange or a national market system, including without limitation the New York Stock Exchange, the
NASDAQ Global Select Market, the NASDAQ Global Market or the NASDAQ Capital Market of The NASDAQ Stock Market, its Fair Market Value will be the closing sales price for such stock (or the closing bid, if no sales were reported) as quoted on
such exchange or system on the day of determination, as reported by such source as the Committee determines to be reliable; 
 (ii) If the Common Stock is
regularly quoted by a recognized securities dealer but selling prices are not reported, the Fair Market Value of a Share will be the mean between the high bid and low asked prices for the Common Stock on the day of determination (or, if no bids and
asks were reported on that date on the last Trading Day such bids and asks were reported), as reported by such source as the Committee determines to be reliable; 

(iii) For any Awards granted on the Registration Date, the Fair Market Value will be the initial price to the public set forth in the final prospectus included
within the registration statement in Form S-1 filed with the Securities and Exchange Commission for the initial public offering of the Company’s Common Stock; or 

(iv) Absent an established market for the Common Stock, the Fair Market Value will be determined in good faith by the Committee. 

Notwithstanding the foregoing, if the determination date for the Fair Market Value occurs on a weekend, holiday or other
non-Trading Day, the Fair Market Value will be the price as determined under subsections (i) through (ii) above on the immediately preceding Trading Day, unless otherwise determined by the Committee.
In addition, for purposes of determining the fair market value of shares for any reason other than the determination of the Exercise Price of Options or Stock Appreciation Rights, fair market value will be determined by the Committee in a manner
compliant with applicable laws and applied consistently for such purpose. Note that the determination of fair market value for purposes of tax withholding may be made in the Committee’s sole discretion subject to applicable laws and is not
required to be consistent with the determination of Fair Market Value for other purposes. 
 “Incentive Option” means an Option that is
intended to comply with the requirements set forth in Section 422 of the Code and that is designated as an Incentive Stock Option by the Committee. 

“Nonemployee Director” means a Director who is not an Employee. 

“Nonqualified Stock Option” means an Option that is not an Incentive Option. 

“Option” means a right to purchase a specified number of shares of Common Stock at a specified price, which is either an Incentive Option or
a Nonqualified Stock Option. 
 “Participant” means an Employee, Consultant or Nonemployee Director to whom an Award has been made under
this Plan. 
 “Performance Award” means an Award which may be earned in whole or in part upon attainment of performance goals or other
vesting criteria as the Committee may determine and which will be settled for cash, shares or other securities or a combination of the foregoing under Section 7. 

“Person” shall have the meaning ascribed to such term in Section 3(a)(9) of the Exchange Act and used in Sections 13(d) and 14(d)
thereof, including a “group” as defined in Section 13(d) thereof. 

 “Prior Plans” means the Stock Option Plan of Sunnova Energy Corporation, as thereafter
amended and the 2013 Stock Option Plan of Sunnova Energy Corporation. 
 “Registration Date” means the effective date of the first
registration statement filed by the Company and declared effective under Section 12(b) of the Exchange Act, with respect to the initial public offering of the Company’s Common Stock. 

“Restricted Stock” means any Common Stock that is restricted or subject to forfeiture provisions. 

“Restricted Stock Unit” means a right to receive a share of Common Stock or the value thereof on such terms and conditions as may be
established by the Committee. 
 “Restriction Period” means a period of time beginning as of the date upon which a Stock Award is made
pursuant to this Plan and ending as of the date upon which the Common Stock subject to such Stock Award is deliverable or no longer restricted or such Stock Award is no longer subject to forfeiture provisions. 

“Rule 16b-3” means Rule 16b-3 promulgated under the Exchange
Act, or any successor rule. 
 “SAR” means a right to receive a payment, in cash or Common Stock, equal to the excess of the Fair Market
Value or other specified valuation of a specified number of shares of Common Stock on the date the right is exercised over a specified strike price, in each case, as determined by the Committee. 

“Stock Award” means an award in the form of shares of Common Stock or units denominated in shares of Common Stock, including Restricted Stock
and Restricted Stock Units. For the avoidance of doubt, a Stock Award does not include an Option or SAR. 
 “Subsidiary” means (i) in
the case of a corporation, any corporation of which the Company directly or indirectly owns shares representing more than 50% of the combined voting power of the shares of all classes or series of capital stock of such corporation which have the
right to vote generally on matters submitted to a vote of the stockholders of such corporation and (ii) in the case of a partnership or other business entity not organized as a corporation, any such business entity of which the Company directly
or indirectly owns more than 50% of the voting, capital or profits interests (whether in the form of partnership interests, membership interests or otherwise). 

“Trading Day” means a day on which the applicable stock exchange or national market system is open for trading. 

“Voting Stock” shall mean stock of any class or kind having the power to vote generally for the election of Directors. 

3. Eligibility. All Employees, Consultants and Nonemployee Directors are eligible for Awards under this Plan in the sole discretion of the Committee.

 4. Common Stock Available for Awards. 
 (a) Subject to
the provisions of Section 14 hereof, there shall be available for Awards under this Plan granted wholly or partly in Common Stock (including rights or Options that may be exercised for or settled in Common Stock) an aggregate of 5,229,318
shares of Common Stock, all of which may be granted as Incentive Options. The number of shares of Common Stock that are the subject of Awards under this Plan or the Prior Plans, that are forfeited or terminated, expire unexercised, are settled in
cash in lieu of Common Stock or are exchanged for Awards that do not involve Common Stock, shall again immediately become available for additional Awards hereunder. Notwithstanding the foregoing, the following shares of Common Stock may not again be
made available for issuance as Awards under this Plan: (i) shares of Common Stock not issued or delivered as a result of the net settlement of a stock-settled SAR or Option, (ii) shares of Common Stock used to pay the exercise price or
withholding taxes related to outstanding Awards, or (iii) shares of Common Stock repurchased on the open market with the proceeds of the option exercise price. Shares of Common Stock delivered under the Plan as an Award or in settlement of an
Award issued or made (a) upon the assumption, substitution, conversion, or replacement of outstanding awards under a plan or arrangement of an entity acquired in a merger or other acquisition or (b) as a post-transaction grant under such a
plan or arrangement of an acquired entity shall not reduce or be counted against the maximum number of shares of Common Stock available for delivery under the Plan, to the extent that the exemption for transactions in connection with

 
mergers and acquisitions from the shareholder approval requirements of the securities exchange on which Common Stock is principally traded, if any), for equity compensation plans applies. The
Board and the appropriate officers of the Company shall from time to time take whatever actions are necessary to file any required documents with governmental authorities, stock exchanges and transaction reporting systems to ensure that shares of
Common Stock are available for issuance pursuant to Awards. 
 (b) Subject to the provisions of Section 14 of the Plan, the number of shares available
for issuance under the Plan will be increased on the first day of each fiscal year beginning with the 2020 fiscal year, in an amount equal to the lesser of (i) a number of shares such that the total number of shares that remain available for
additional grants under the Plan equals five percent (5%) of the outstanding shares of all classes of the Company’s common stock on the last day of the immediately preceding fiscal year or (ii) such number of shares determined by the
Board. 
 5. Administration. 
 (a) Except as otherwise
provided in this Plan with respect to actions or determinations by the Board, this Plan shall be administered by the Committee. To the extent required in order for Awards to be exempt from Section 16 of the Exchange Act by virtue of the
provisions of Rule 16b-3, (i) the Committee shall consist of at least two members of the Board who meet the requirements of the definition of “non-employee
director” set forth in Rule 16b-3 (b)(3)(i) promulgated under the Exchange Act or (ii) Awards may be granted by, and this Plan may be administered by, the Board. 

(b) Subject to the provisions hereof, the Committee shall have full and exclusive power and authority to administer this Plan and to take all actions that are
specifically contemplated hereby or are necessary or appropriate in connection with the administration hereof. The Committee shall also have full and exclusive power to interpret this Plan and to adopt such rules, regulations and guidelines for
carrying out this Plan as it may deem necessary or proper. The Committee may, in its discretion, provide for the extension of the exercisability of an Award, accelerate the vesting or exercisability of an Award, eliminate or make less restrictive
any restrictions contained in an Award, waive any restriction or other provision of this Plan or an Award or otherwise amend or modify an Award in any manner that is either (i) not adverse to the Participant to whom such Award was granted or
(ii) consented to by such Participant. Notwithstanding the foregoing, except in connection with a transaction involving the Company or its capitalization (as provided in Section 14), the terms of outstanding Awards may not be amended
without approval of the stockholders of the Company to (i) reduce the exercise price of outstanding Options or SARs or (ii) cancel, exchange, substitute, buyout or surrender outstanding Options or SARs in exchange for cash or other Awards
when the exercise price per share of the original Options or SARs exceeds the Fair Market Value of one share of Common Stock, (iii) take any other action with respect to an Option or SAR that would be treated as a repricing under the rules and
regulations of the principal national securities exchange on which the shares of Common Stock are listed or (iv) permit the grant of any Options or SARs that contains a so-called “reload”
feature under which additional Options, SARs or other Awards are granted automatically to the Participant upon exercise of the original Option or SAR. The Committee may make an Award to an individual who it expects to become an Employee, or
Nonemployee Director of the Company or any of its Subsidiaries within the next six months, with such award being subject to the individual actually becoming an Employee or Nonemployee Director, as applicable, within such time period, and subject to
such other terms and conditions as may be established by the Committee. The Committee may correct any defect or supply any omission or reconcile any inconsistency in this Plan or in any Award in the manner and to the extent the Committee deems
necessary or desirable to further the purposes of this Plan. Any decision of the Committee in the interpretation and administration of this Plan shall lie within its sole and absolute discretion and shall be final, conclusive and binding on all
parties concerned. 
 (c) No member of the Committee or the Board or officer of the Company to whom the Committee has delegated authority in accordance with
the provisions of Section 6 of this Plan shall be liable for anything done or omitted to be done by him or her, by any member of the Committee or by any officer of the Company in connection with the performance of any duties under this Plan,
except for his or her own willful misconduct or as expressly provided by statute. 
 6. Delegation of Authority. To the extent allowed by applicable
law, the Committee may delegate to the Chief Executive Officer, to other senior officers of the Company or to other committees of the Board its duties under this Plan pursuant to such conditions or limitations as the Committee may establish, except
that the Committee may not delegate the authority to grant Awards to, or take other action with respect to, Participants who are subject to Section 16 of the Exchange Act. 

 7. Employee Awards. The Committee shall determine the type or types of Awards to be made under this
Plan and shall designate from time to time the Employees who are to be the recipients of such Awards. Each Award may be embodied in an Award Agreement, which shall contain such terms, conditions and limitations as shall be determined by the
Committee in its sole discretion, including any treatment upon a Change in Control, and shall be accepted by the Participant to whom the Award is made. Awards may consist of those listed in this Section 7 and may be granted singly, in
combination or in tandem. Awards may also be made in combination or in tandem with, in replacement of, or as alternatives to, grants or rights under this Plan or any other employee plan of the Company or any of its Subsidiaries, including the plan
of any acquired entity. All or part of an Award may be subject to conditions established by the Committee, which may include, but are not limited to, continuous service with the Company, its Affiliates and Subsidiaries, achievement of specific
performance or business objectives. Upon the termination of service with the Company, its Affiliates and Subsidiaries of a Participant, any unexercised, deferred, unvested or unpaid Awards shall be treated as set forth in the applicable Award
Agreement. 
 (a) Stock Option. An Award may be in the form of an Option. An Option awarded pursuant to this Plan may consist of an Incentive Option
or a Nonqualified Option. The price at which a share of Common Stock may be purchased upon the exercise of an Option shall be not less than the Fair Market Value of the Common Stock on the date of grant. Subject to the foregoing provisions, the
terms, conditions and limitations applicable to any Options awarded pursuant to this Plan, including the term of any Options and the date or dates upon which they become exercisable, shall be determined by the Committee. Only Employees may be
granted Incentive Options. The term of Options shall not exceed ten years from the date of grant; provided, however, if the term of a Nonqualified Stock Option expires when trading in the Common Stock is prohibited by applicable law or
at a time in which there is a blackout period or restriction period under the Company’s insider trading policy or practices (as then in effect), then the term of such Nonqualified Stock Option shall expire on the 30th day after the expiration
of such prohibition. 
 (b) Stock Appreciation Right. An Award may be in the form of a SAR. The per share strike price for a SAR shall be not less
than the Fair Market Value of the Common Stock on the date on which the SAR is granted. The terms, conditions and limitations applicable to any SARs awarded pursuant to this Plan, including the term of any SARs, whether the SAR will be settled in
cash or stock and the date or dates upon which they become exercisable, shall be determined by the Committee. The term of SARs shall not exceed ten years from the date of grant; provided, however, if the term of a SAR expires when
trading in the Common Stock is prohibited by applicable law or at a time in which there is a blackout period or restriction period under the Company’s insider trading policy or practices (as then in effect), then the term of such SAR shall
expire on the 30th day after the expiration of such prohibition. 
 (c) Stock Award. An Award may be in the form of a Stock Award. The terms,
conditions and limitations applicable to any Stock Awards granted pursuant to this Plan shall be determined by the Committee. 
 (d) Cash Award. An
Award may be in the form of a Cash Award. The terms, conditions and limitations applicable to any Cash Awards granted pursuant to this Plan shall be determined by the Committee. 

(e) Performance Award. Without limiting the type or number of Awards that may be made under the other provisions of this Plan, an Award may be in the
form of a Performance Award. The amount of cash or shares payable or vested pursuant to Performance Awards may be adjusted upward or downward, either on a formula or discretionary basis or any combination, as the Committee determines. Subject to the
foregoing provisions, the terms, conditions and limitations applicable to any Performance Awards made pursuant to this Plan shall be determined by the Committee. 

8. Director Awards. The Committee may grant Awards to Nonemployee Directors from time to time in accordance with this Section 8. Such Awards may
consist of the forms of Award described in Section 7, other than Incentive Options, and shall be granted subject to such terms and conditions as specified in Section 7. No Nonemployee Director may be granted during any calendar year Awards
having a fair value determined on the date of grant when added to all cash compensation paid to the Nonemployee Director (in his capacity as Nonemployee Director) during the same calendar year in excess of $500,000. 

9. Payment of Awards. 
 (a) General. Payment of
Awards may be made in the form of cash or Common Stock, or a combination thereof, and may include such restrictions as the Committee shall determine, including, in the case of Common Stock, restrictions on transfer and forfeiture provisions. If
payment of an Award is made in the form of Restricted Stock, the right to receive such shares shall be evidenced by book entry registration or in such other manner as the Committee may determine. Any statement of ownership evidencing such Restricted
Stock shall contain appropriate legends and restrictions that describe the terms and conditions of the restrictions applicable thereto. 

 (b) Dividends and Dividend Equivalents. In the discretion of the Committee, rights to dividends or
Dividend Equivalents may be extended to and made part of any Stock Award. No Dividend Equivalents may be paid in respect of an Award of Options or SARs. 

10. Stock Option Exercise. The price at which shares of Common Stock may be purchased under an Option shall be paid in full at the time of exercise in
cash or, if elected by the optionee, the optionee may purchase such shares by means of tendering Common Stock valued at Fair Market Value on the date of exercise, or any combination thereof. The Committee shall determine acceptable methods for
Participants to tender Common Stock. The Committee may provide for procedures to permit the exercise or purchase of such Awards by foregoing the delivery of shares of Common Stock otherwise deliverable upon the exercise of the Option or by use of
the proceeds to be received from the sale of Common Stock issuable pursuant to an Award. 
 11. Taxes. The Company shall have the right to deduct
applicable taxes from any Award payment and withhold, at the time of delivery or vesting of cash or shares of Common Stock under this Plan, an appropriate amount of cash or number of shares of Common Stock or a combination thereof for payment of
taxes required by law or to take such other action as may be necessary in the opinion of the Company to satisfy all obligations for withholding of such taxes. The Committee may also permit withholding to be satisfied by (i) the transfer to the
Company of shares of Common Stock theretofore owned by the holder of the Award or (ii) withholding from the shares otherwise deliverable under the Award, in either case with respect to which withholding is required, up to the maximum tax rate
applicable to the Participant, as determined by the Committee. If shares of Common Stock are used to satisfy tax withholding, such shares shall be valued based on the Fair Market Value when the tax withholding is required to be made. 

12. Amendment, Modification, Suspension or Termination. The Board may amend, modify, suspend or terminate this Plan for the purpose of meeting or
addressing any changes in legal requirements or for any other purpose permitted by law, except that (i) no amendment or alteration that would adversely affect the rights of any Participant under any Award previously granted to such Participant
shall be made without the consent of such Participant and (ii) no amendment or alteration shall be effective prior to its approval by the stockholders of the Company to the extent such approval is then required pursuant to Rule 16b-3 in order to preserve the applicability of any exemption provided by such rule to any Award then outstanding (unless the holder of such Award consents) or to the extent stockholder approval is otherwise
required by applicable legal requirements. 
 13. Assignability. 

(a) Unless otherwise determined by the Committee and provided in the Award Agreement, no Award or any other benefit under this Plan constituting a derivative
security within the meaning of Rule 16a-1(c) under the Exchange Act shall be assignable or otherwise transferable except by will or the laws of descent and distribution or pursuant to a qualified domestic
relations order in a form acceptable to the Committee. The Committee may prescribe and include in applicable Award Agreements other restrictions on transfer. Any attempted assignment of an Award or any other benefit under this Plan in violation of
this Section 13 shall be null and void. 
 (b) Subject to approval by the Committee in its sole discretion, other than with respect to Incentive
Options, all or a portion of the Awards granted to a Participant under this Plan may be transferable by the Participant, to the extent and only to the extent specified in such approval, to (a) the spouse, children or grandchildren (including
adopted and stepchildren and grandchildren) of the Participant (“Immediate Family Members”), (b) a trust or trusts for the exclusive benefit of such Immediate Family Members and, if applicable, the Participant or (c) a partnership or
partnerships in which such Immediate Family Members and, if applicable, the Participant are the only partners. Subsequent transfers of transferred Awards shall be prohibited except by will or the laws of descent and distribution, unless such
transfers are made to the original Participant or a person to whom the original Participant could have made a transfer in the manner described herein. No transfer shall be effective unless and until written notice of such transfer is provided to the
Committee, in the form and manner prescribed by the Committee. Following transfer, any such Awards shall continue to be subject to the same terms and conditions as were applicable immediately prior to transfer, and except as otherwise provided
herein, the term “Participant” shall be deemed to refer to the transferee. No transferred Options shall be exercisable unless arrangements satisfactory to the Company have been made to satisfy any tax withholding obligations the Company
may have with respect to the Options. The consequences of termination of employment or service shall continue to be applied with respect to the original Participant, following which the Awards shall be exercisable by the transferee only to the
extent and for the periods specified in this Plan and the Award Agreement. 

 14. Adjustments. 

(a) The existence of outstanding Awards shall not affect in any manner the right or power of the Company or its stockholders to make or authorize any or all
adjustments, recapitalizations, reorganizations or other changes in the capital stock of the Company or its business or any merger or consolidation of the Company, or any issue of bonds, debentures, preferred or prior preference stock (whether or
not such issue is prior to, on a parity with or junior to the Common Stock) or the dissolution or liquidation of the Company, or any sale or transfer of all or any part of its assets or business, or any other corporate act or proceeding of any kind,
whether or not of a character similar to that of the acts or proceedings enumerated above. 
 (b) In the event of any subdivision or consolidation of
outstanding shares of Common Stock, declaration of a dividend payable in shares of Common Stock or other stock split, the adoption by the Company of any plan of exchange affecting the Common Stock or any distribution to holders of Common Stock of
securities or property (other than normal cash dividends or dividends payable in Common Stock), (i) the number of shares of Common Stock reserved under this Plan, (ii) the number of shares of Common Stock covered by Awards in the form of
Common Stock or units denominated in Common Stock, (iii) the exercise or other price in respect of such Awards, and (iv) the appropriate Fair Market Value and other price determinations for such Awards shall each be proportionately
adjusted by the Committee to reflect such event; provided that such adjustments shall only be such as are necessary to maintain the proportionate interest of the holders of the Awards and preserve, without exceeding, the value of such Awards. 

(c) In the event of a corporate merger, consolidation, acquisition of property or stock, separation, reorganization or liquidation, the Committee may make such
adjustments to outstanding Awards or other provisions for the disposition of outstanding Awards as it deems equitable, and shall be authorized, in its discretion, (i) to provide for the substitution of a new Award or other arrangement (which,
if applicable, may be exercisable for such property or stock as the Committee determines) for an outstanding Award or the assumption of an outstanding Award, regardless of whether in a transaction to which Section 424(a) of the Code applies,
(ii) to provide, prior to the transaction, for the acceleration of the vesting and exercisability of, or lapse of restrictions with respect to, the outstanding Award and, if the transaction is a cash merger, to provide for the termination of
any portion of the Award that remains unexercised at the time of such transaction or (iii) to provide for the acceleration of the vesting and exercisability of an outstanding Award and the cancellation thereof in exchange for such payment of
such cash or property as shall be determined by the Committee in its sole discretion, which for the avoidance of doubt in the case of Options or SARs (whether stock- or cash-settled) shall be the excess, if any, of the Fair Market Value of the
shares of Common Stock subject to the Option or SAR on such date over the aggregate exercise price of such Award; provided, however, that no such adjustment shall increase the aggregate value of any outstanding Award. No adjustment or
substitution pursuant to this Section 14 shall be made in a manner that results in noncompliance with Section 409A of the Code, to the extent applicable. 

15. Change in Control. The consequences of a Change in Control on any outstanding Award shall be determined by the Committee and may be reflected in the
applicable Award Agreement, or may be as provided in an individual severance or employment agreement to which a Participant is a party. 
 16.
Restrictions. 
 (a) No Common Stock or other form of payment shall be issued with respect to any Award unless the Company shall be satisfied based on
the advice of its counsel that such issuance will be in compliance with applicable federal and state securities laws. The inability of the Company to obtain authority from any regulatory body having jurisdiction or to complete or comply with the
requirements of any registration or other qualification of the shares under any U.S. federal or state law, any non-U.S. law, or the rules and regulations of the Securities and Exchange Commission,
the stock exchange on which shares of the same class are then listed, or any other governmental or regulatory body, which authority, registration, qualification or rule compliance is deemed by the Company’s counsel to be necessary or advisable
for the issuance and sale of any shares hereunder, will relieve the Company of any liability in respect of the failure to issue or sell such shares as to which such requisite authority, registration, qualification or rule compliance will not have
been obtained. 
 (b) It is the intent of the Company that grants of Awards under this Plan comply with Rule 16b-3
with respect to individuals subject to Section 16 of the Exchange Act unless otherwise provided herein or in an Award Agreement and that any ambiguities or inconsistencies in the construction of such an Award or this Plan be interpreted to give
effect to such intention. Certificates evidencing shares of Common Stock delivered under this Plan (to the extent that 

 
such shares are so evidenced) may be subject to such stop transfer orders and other restrictions as the Committee may deem advisable under the rules, regulations and other requirements of the
Securities and Exchange Commission, any securities exchange or transaction reporting system upon which the Common Stock is then listed or to which it is admitted for quotation and any applicable federal or state securities law. The Committee may
cause a legend or legends to be placed upon such certificates (if any) to make appropriate reference to such restrictions. The Committee may also impose such restrictions, conditions or limitations as it determines appropriate as to the timing and
manner of any resales by a Participant, other subsequent transfers by the Participant of any shares of Common Stock issued as a result of or under an Award, or the exercise of Options and SARs, including without limitation, restrictions under an
insider trading policy. 
 17. Unfunded Plan. Insofar as it provides for Awards of cash, Common Stock or rights thereto, this Plan shall be unfunded.
Although bookkeeping accounts may be established with respect to Participants who are entitled to cash, Common Stock or rights thereto under this Plan, any such accounts shall be used merely as a bookkeeping convenience. The Company shall not be
required to segregate any assets that may at any time be represented by cash, Common Stock or rights thereto, nor shall this Plan be construed as providing for such segregation, nor shall the Company, the Board or the Committee be deemed to be a
trustee of any cash, Common Stock or rights thereto to be granted under this Plan. Any liability or obligation of the Company to any Participant with respect to an Award of cash, Common Stock or rights thereto under this Plan shall be based solely
upon any contractual obligations that may be created by this Plan and any Award Agreement, and no such liability or obligation of the Company shall be deemed to be secured by any pledge or other encumbrance on any property of the Company. Neither
the Company nor the Board nor the Committee shall be required to give any security or bond for the performance of any obligation that may be created by this Plan. 

18. Section 409A of the Code. All Awards under this Plan are intended either to be exempt from, or to comply with the requirements of
Section 409A, and this Plan and all Awards shall be interpreted and operated in a manner consistent with that intention. Notwithstanding anything in this Plan to the contrary, if any Plan provision or Award under this Plan would result in the
imposition of an applicable tax under Section 409A, that Plan provision or Award shall be reformed to avoid imposition of the applicable tax and no such action shall be deemed to adversely affect the Participant’s rights to an Award. 

19. Governing Law. This Plan and all determinations made and actions taken pursuant hereto, to the extent not otherwise governed by mandatory provisions
of the Code or the securities laws of the United States, shall be governed by and construed in accordance with the laws of the State of Delaware. 
 20.
Clawback. To the extent required by applicable law or any applicable securities exchange listing standards, or as otherwise determined by the Committee, Awards and amounts paid or payable pursuant to or with respect to Awards shall be subject
to the provisions of any clawback policy implemented by the Company, which clawback policy may provide for forfeiture, repurchase or recoupment of Awards and amounts paid or payable pursuant to or with respect to Awards. Notwithstanding any
provision of this Plan or any Award Agreement to the contrary, the Company reserves the right, without the consent of any Participant, to adopt any such clawback policies and procedures. 

21. No Right to Employment or Continued Service. Nothing in this Plan or an Award Agreement shall interfere with or limit in any way the right of the
Company or a Subsidiary to terminate any Participant’s employment or other service relationship at any time, nor confer upon any Participant any right to continue in the capacity in which he or she is employed or otherwise serves the Company or
any Subsidiary. Further, nothing in this Plan or an Award Agreement constitutes any assurance or obligation of the Board to nominate any Nonemployee Director for re-election by the Company’s stockholders.
In accepting the Award under the Plan, each Participant acknowledges that: 
 (a) The Plan is established voluntarily by the Company, it is discretionary in
nature and it may be modified, amended, suspended or terminated by the Company at any time, unless otherwise provided in the Plan and this Award Agreement. 

(b) The Award is a one-time benefit and does not create any contractual or other right to receive an award or benefits
in lieu of an award in the future; future awards, if any, will be at the sole discretion of the Company. 
 (c) The Participant is voluntarily participating
in the Plan. 
 (d) An Award is an extraordinary item that does not constitute compensation of any kind for services of any kind rendered to the Employer,
and which is outside the scope of the Participant’s employment contract, if any. 

 (e) The Award is not part of normal or expected compensation or salary for any purpose, including, but not
limited to, calculating any severance, resignation, termination, redundancy, end of service payments, bonuses, long-service awards, pension or retirement benefits or similar payments and in no event should be considered as compensation for, or
relating in any way to, past services for the Company or the Employer. 
 (f) The Award will not be interpreted to form an employment contract or
relationship with the Company; and furthermore, the Award will not be interpreted to form an employment contract with any Subsidiary. 
 (g) This Agreement
shall not confer upon the Participant any right to continuation of employment by the Company, nor shall this Agreement interfere in any way with the Company’s right to terminate the Participant’s employment at any time, as may be permitted
under local law. 
 (h) The future value of the underlying shares of Common Stock is unknown and cannot be predicted with certainty. 

(i) If the Award vests and the Participant obtains shares of Common Stock, the value of those shares acquired may increase or decrease in value. 

(j) In consideration of the grant of an Award, no claim or entitlement to compensation or damages shall arise from termination of the Award or diminution in
value of the Award or shares of Common Stock acquired upon settlement of the Award resulting from termination of the Participant’s employment (for any reason whatsoever and whether or not in breach of local labor laws) and the Participant
irrevocably releases the Company and his employer (if different) from any such claim that may arise; if, notwithstanding the foregoing, any such claim is found by a court of competent jurisdiction to have arisen, then, by accepting this Award, the
Participant will be deemed irrevocably to have waived the Participant’s entitlement to pursue such claim. 
 (k) Except as may be expressly provided
otherwise in the applicable Award Agreement, in the event of involuntary termination of Participant’s employment (whether or not in breach of local labor laws), Participant’s right to receive the Award and vest under the Plan, if any, will
terminate effective as of the date that Participant is no longer actively employed and will not be extended by any notice period mandated under local law (e.g., active employment would not include a period of “garden leave” or similar
period pursuant to local law); furthermore, in the event of involuntary termination of employment (whether or not in breach of local labor laws), Participant’s right to receive shares of Common Stock pursuant to an Award after termination of
employment, if any, will be measured by the date of termination of Participant’s active employment and will not be extended by a notice period mandated under local law; the Committee shall have the exclusive discretion to determine when the
Participant is no longer actively employed for purposes of the award of the Award. 
 (l) Except as provided in the Plan, the Award and benefits under the
Plan, if any, will not automatically transfer to another company in the case of a merger, take-over or transfer of liability. 
 22. Successors. All
obligations of the Company under this Plan with respect to Awards granted hereunder shall be binding on any successor to the Company by merger, consolidation or otherwise. For the avoidance of doubt, nothing contained in the Plan is intended to
amend or abrogate a Participant’s rights under an employment agreement with the Company. 
 23. Non-United
States Participants. The Board or Committee may grant Awards to individuals outside the United States under such terms and conditions as may, in the judgment of the Board or Committee, as applicable, be necessary or advisable to comply with the
laws of the applicable foreign jurisdictions and, to that end, may establish sub-plans, modified vesting, exercise or settlement procedures and other terms and procedures. Notwithstanding the above, neither
the Board nor the Committee may take any actions under this Plan, and no Awards shall be granted, that would violate the Securities Exchange Act of 1934, the Code or any other applicable law. 

24. Effectiveness. This Plan, as approved by the Board on July 10, 2019, shall be effective as of the Registration Date. This Plan shall continue
in effect for a term of ten years after the Registration Date, unless sooner terminated by action of the Board. The Plan was approved by the holders of a majority of shares of Common Stock effective as of July 24, 2019. 

 IN WITNESS WHEREOF, the Company has caused this Plan to be executed by its duly authorized officer. 

 

							
	SUNNOVA ENERGY INTERNATIONAL INC.
		
	By:	 	 /s/ William J. Berger

	Name:	 	William J. Berger
	Title:	 	Chairman of the Board, President and Chief Executive Officer

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