Document:

EX-10.10

 Exhibit 10.10 

Execution Version 

AMENDED AND RESTATED PARENT GUARANTY 

This AMENDED AND RESTATED PARENT GUARANTY (this “Guaranty”), dated as of June 27, 2019 (the “Effective
Date”), is made by SUNNOVA ENERGY CORPORATION, a Delaware corporation (the “Parent Guarantor”), in favor of SUNNOVA TEP II HOLDINGS, LLC, a Delaware limited liability company (the “Borrower”), and
CREDIT SUISSE AG, NEW YORK BRANCH (the “Administrative Agent”), as agent under that certain Amended and Restated Credit Agreement, dated as of March 29, 2019 (including all annexes, exhibits and schedules thereto, and as from
time to time amended, restated, supplemented or otherwise modified, the “Credit Agreement”), by and among the Borrower, Sunnova TE Management II, LLC, as facility administrator (“Sunnova Management” or in such
capacity, the “Facility Administrator”), the Administrative Agent, the financial institutions that become parties thereto as lenders (the “Lenders”), the Funding Administrative Agents named therein, Wells Fargo
Bank, National Association, as paying agent and U.S. Bank National Association, as verification agent. Capitalized terms used but not defined herein shall have the meanings specified in the Credit Agreement. 

RECITALS 
 WHEREAS, the
Parent Guarantor, the Borrower, and the Administrative Agent entered into that certain Parent Guaranty dated as of August 17, 2018 (“Original Guaranty”) in order to induce the Borrower and the Administrative Agent to enter into
the Credit Agreement, and pursuant to which the Parent Guarantor agreed to (A) guaranty the performance and observance by Sunnova Management of its obligations as Facility Administrator under that certain Facility Administration Agreement,
dated as of August 17, 2018, by and among the Borrower, the Facility Administrator and the Administrative Agent, and (B) pay Liquidated Damages Amounts to the Borrower for breaches of representations and warranties in respect of the Solar
Assets; and 
 WHEREAS, the parties hereto wish to amend and restate the Original Guaranty in its entirety. 

NOW, THEREFORE, in consideration of the premises and the mutual agreements contained herein, the parties hereby agree as follows: 

SECTION 1. Unconditional Undertaking. (a) The Parent Guarantor hereby unconditionally and irrevocably undertakes and agrees with
and for the benefit of the Borrower and the Administrative Agent to: 
  

	 	(i)	 cause the due and punctual performance and observance by Sunnova Management and its successors and assigns of
all terms, covenants, conditions, agreements, undertakings and other obligations to be performed or observed by Sunnova Management under the Facility Administration Agreement in accordance with the respective terms thereof (collectively, the
“Obligations”), 

	 	(ii)	 upon the receipt of notice by the Borrower or the Administrative Agent of the existence of a Defective Solar
Asset, within sixty (60) days of such notice, cure in all material respects the circumstance or condition which has caused such Solar Asset to become a Defective Solar Asset or pay the Liquidated Damages Amount in respect of Defective Solar
Asset; provided that instead of paying the Liquidated Damages Amount in respect of a SAP II Solar Asset, the Parent may instead elect in its sole discretion, subject to the satisfaction of the conditions set forth in Section 2.8 of the
Credit Agreement, to substitute one or more Substitute Solar Assets for such Defective Solar Asset and pay the related Substitution Shortfall Amount, if any, on any date prior to expiration of such sixty (60) day cure period, and

  

	 	(iii)	 pay any and all expenses (including reasonable counsel fees and expenses) incurred by the Borrower or the
Administrative Agent in enforcing their respective rights against Sunnova Management under the Facility Administration Agreement and this Guaranty. 

For purposes of this Section 1, the following terms shall have the meanings set forth below: 

“Liquidated Damages Amount” shall mean, with respect to any Solar Asset, an amount equal to the present value of the remaining and unpaid
stream of Net Scheduled Payments for such Solar Asset for the period beginning on such date of determination, based upon discounting such Net Scheduled Payments to such date of determination at an annual rate equal to the Discount Rate, determined
immediately prior to such Solar Assets becoming a Transferable Solar Asset. 
 (b) If Sunnova Management fails in any manner whatsoever to
perform or observe any of the Obligations applicable to it when the same shall be required to be performed or observed under the Facility Administration Agreement, after giving effect to any applicable grace or cure period thereunder, the Parent
Guarantor will itself, within three Business Days of the earlier of (i) the Parent Guarantor’s knowledge of such failure or (ii) demand from the Administrative Agent, duly and punctually perform or observe, or cause to be duly and
punctually performed or observed, such Obligations, and it shall not be a condition to the accrual of the obligation of the Parent Guarantor hereunder to perform or observe any Obligation (or to cause the same to be performed or observed) that the
Borrower or the Administrative Agent shall have first made any request of or demand upon or given any notice to the Parent Guarantor or to Sunnova Management, as applicable, or its successors or assigns, or have instituted any action or proceeding
against the Parent Guarantor or Sunnova Management, as applicable, or its successors or assigns in respect thereof. 
 (c) Upon the
requirement to pay Liquidated Damages Amounts or Substitution Shortfall Amounts, if any, in accordance with Section 1(a)(ii), the Borrower and the Administrative Agent hereby direct and the Parent hereby agrees to pay all such Liquidated
Damages Amounts or Substitution Shortfall Amount, if any, by remitting all such amounts in immediately available funds to the Paying Agent for deposit into the Collection Account. 

SECTION 2. Obligation Absolute. The Parent Guarantor agrees that, to the maximum extent permitted by Applicable Law, the Obligations
not performed by Sunnova Management will be performed by the Parent Guarantor strictly in accordance with the terms of the Facility Administration Agreement regardless of any law, regulation or order now or hereafter in effect in

  
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any jurisdiction affecting any of such terms or the rights of Sunnova Management with respect thereto. The obligations of the Parent Guarantor under this Guaranty are independent of the
Obligations, and a separate action or actions may be brought and prosecuted against the Parent Guarantor to enforce this Guaranty, to the maximum extent permitted by Applicable Law, irrespective of whether any action is brought against Sunnova
Management or whether Sunnova Management is joined in any such action or actions. Except as provided in Section 10 hereof, to the maximum extent permitted by Applicable Law, the liability of the Parent Guarantor under this Guaranty shall be
absolute and unconditional irrespective of: 
 (a) any lack of validity or enforceability against Sunnova Management of the Facility
Administration Agreement or any other agreement or instrument relating thereto; 
 (b) any change in the time, manner or place of performance
of, or in any other term of, all or any of the Obligations, or any other amendment or waiver of or any consent to departure from any Transaction Document; 

(c) any taking, exchange, release or non-perfection of any collateral, or any taking, release,
amendment or waiver of, or consent to departure from, any guaranty, for all or any of the Obligations; 
 (d) any manner of application of
collateral, or proceeds thereof, to all or any of the Obligations (unless such application satisfies the Obligations in full), or any manner of sale or other disposition of any collateral or any other assets of Sunnova Management or any of its
subsidiaries for all or any of the Obligations; 
 (e) any change, restructuring or termination of the corporate structure or existence of
Sunnova Management, the Parent Guarantor or any of their respective subsidiaries; 
 (f) any other circumstance that might otherwise
constitute a legal or equitable discharge or defense available to, or a discharge of, Sunnova Management, the Parent Guarantor, as applicable, or a guarantor; 

(g) the absence of any attempt by, or on behalf of, the Administrative Agent or any of the Lenders, to collect, or to take any other action to
enforce, all or any part of the Loan Notes or the Obligations; 
 (h) the election of any remedy by, or on behalf of, the Administrative
Agent or any of the Lenders, in any proceeding of the Borrower instituted under Chapter 11 of Title 11 of the United States Code (11 U.S.C. 101 et seq.) (the “Bankruptcy Code”), of the application of Section 1111(b)(2) of the
Bankruptcy Code; 
 (i) any borrowing or grant of a security interest by the Borrower, as a debtor in possession, under Section 364 of
the Bankruptcy Code; 

  
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 (j) the disallowance, under Section 502 of the Bankruptcy Code, of all or any portion
of the claims of the Administrative Agent or any of the Lenders against the Borrower for repayment of all or any part of the Obligations (not as defined herein, but as defined in the Credit Agreement), including any amount due hereunder; or 

(k) any actual or alleged fraud by any party (other than the Administrative Agent, any Successor Facility Administrator, any of the Lenders,
the Paying Agent or the Verification Agent). 
 This Guaranty shall continue to be effective or be reinstated, as the case may be, if at any time any
payment of any of the Obligations is rescinded or must otherwise be returned by the Borrower or the Administrative Agent upon the insolvency, bankruptcy or reorganization of Sunnova Management or the Parent Guarantor, as applicable, or otherwise, to
the maximum extent permitted by Applicable Law, all as though payment had not been made. 
 SECTION 3. Waiver. The Parent Guarantor
hereby waives, to the maximum extent permitted by Applicable Law, promptness, diligence, notice of acceptance and any other notice (except as specifically provided for in the Facility Administration Agreement) with respect to any of the Obligations
and this Guaranty and any requirement that the Borrower or the Administrative Agent protect, secure, perfect or insure any security interest or lien or any property subject thereto or exhaust any right or take any action against any person or entity
or any collateral. 
 SECTION 4. Subrogation. The Parent Guarantor will not exercise any rights that it may acquire by way of
subrogation under this Guaranty, by any performance hereunder or otherwise, until all the Obligations and all other amounts payable under this Guaranty and the Facility Administration Agreement shall have been performed in full. If any amount shall
be paid to the Parent Guarantor on account of such subrogation rights at any time prior to the performance in full of the Obligations under this Guaranty and the Facility Administration Agreement, such amount shall be held in trust for the benefit
of the Borrower or the Administrative Agent, as the case may be, and shall forthwith be paid to the Borrower or the Administrative Agent, as the case may be, to be credited and applied to the Obligations, whether matured or unmatured, in accordance
with the terms of the Facility Administration Agreement or to be held by the Borrower or the Administrative Agent as the case may be, as collateral security for any Obligations thereafter existing. If all the Obligations under this Guaranty shall be
performed in full, the Borrower or the Administrative Agent, as the case may be, will, at the Parent Guarantor’s request, execute and deliver to the Parent Guarantor appropriate documents, without recourse and without representation or
warranty, necessary to evidence the transfer by subrogation to the Parent Guarantor of any interest in the Obligations resulting from such payment by the Parent Guarantor. 

  
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 SECTION 5. Representations and Warranties and Covenants. Effective on, and as of, the
Effective Date, unless otherwise specifically set forth in the applicable representation or warranty, the Parent Guarantor hereby represents, warrants and covenants that: 

(a) Existence. The Parent Guarantor (i) is, and at all times during the term of this Guaranty will be, an entity duly organized,
validly existing and in good standing under the laws of the jurisdiction of its organization, (ii) has, and at all times during the term of this Guaranty will have, all requisite corporate or other power, and all governmental licenses,
authorizations, consents and approvals necessary to own its assets and carry on its business as now being or as proposed to be conducted, except where the lack of such licenses, authorizations, consents and approvals would not be reasonably likely
to have a material adverse effect on the ability of the Parent Guarantor to perform its obligations under this Guaranty or the business, operations, financial condition, or assets of the Parent Guarantor, and (iii) is qualified to do business
and is in good standing in all other jurisdictions in which the nature of the business conducted by it makes such qualification necessary, except where failure so to qualify would not be reasonably likely (either individually or in the aggregate) to
have a material adverse effect on the ability of the Parent Guarantor to perform its obligations under this Guaranty or the business, operations, financial condition, or assets of the Parent Guarantor. 

(b) Financial Condition. The Parent Guarantor has heretofore furnished to the
Borrower and the Administrative Agent, a copy of: 
  

	 	(i)	 the consolidated balance sheet of the Parent Guarantor and its consolidated subsidiaries for the fiscal year
ended December 31, 2018, and the related consolidated statements of operations and of cash flows for the Parent Guarantor and its consolidated subsidiaries for such fiscal year, setting forth in each case in comparative form the figures for the
previous year, with the opinion thereon by PricewaterhouseCoopers LLP; and 

  

	 	(ii)	 the unaudited consolidated balance sheet of the Parent Guarantor and its consolidated subsidiaries for the
fiscal quarter of the Parent Guarantor ended March 31, 2019 setting forth the related unaudited interim consolidated statements of operations for such fiscal quarter and cash flows for such period for the Parent Guarantor and its consolidated
subsidiaries. 

 All such financial statements are complete and correct and fairly present, in all material respects, the consolidated
financial condition of the Parent Guarantor and its subsidiaries and the consolidated results of their operations as at such dates and for such fiscal periods, all in accordance with generally accepted accounting principles applied on a consistent
basis. Since December 31, 2018, through the date of this Guaranty, there has been no material adverse change in the consolidated business, operations or financial condition of the Parent Guarantor and its consolidated subsidiaries, as
applicable, taken as a whole from that set forth in said financial statements. 
 (c) Litigation. Other than the actions, suits,
arbitrations or litigation disclosed in the Parent Guarantor’s quarterly or annual financial statements, there are no actions, suits, arbitrations, investigations (including, without limitation, any of the foregoing which are pending or
threatened) or other legal or arbitrable proceedings affecting the Parent Guarantor or any of its Affiliates or affecting any of the property of any of them before any Governmental Authority (i) that questions or challenges the validity or
enforceability of this Guaranty or any action to be 

  
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taken in connection with the transactions contemplated hereby or (ii) which, individually or in the aggregate, if adversely determined, would reasonably be likely to have a material adverse
effect on the ability of the Parent Guarantor to perform its obligations under this Guaranty or the business, operations, financial condition, or assets of the Parent Guarantor. 

(d) No Breach. Neither (i) the execution and delivery of this Guaranty nor (ii) the consummation of the transactions herein
contemplated in compliance with the terms and provisions hereof will conflict with or result in a breach of the charter or by-laws of the Parent Guarantor, or any applicable law, rule or regulation, or any
order, writ, injunction or decree of any Governmental Authority, or other material agreement or instrument to which the Parent Guarantor is a party or by which any of its property is bound or to which it is subject, or constitute a default under any
such material agreement or instrument or result in the creation or imposition of any Lien upon any property of the Parent Guarantor or any of its subsidiaries pursuant to the terms of any such agreement or instrument. 

(e) No Defaults or Violations. The Parent Guarantor is not in default under any material agreement, contract or instrument, as
applicable, to which the Parent Guarantor is a party or by which it is or its properties are bound, or subject to or in violation of any statute or of any order or regulation of any court, administrative agency, arbitrator or governmental body that
would have a material adverse effect on the ability of the Parent Guarantor to perform its obligations under this Guaranty or the business, operations, financial condition, or assets of the Parent Guarantor; and no event has occurred which with
notice or lapse of time or both would constitute such a default with respect to any such agreement, contract, instrument or indenture, or such a violation of any statute or of any order or regulation of any court, administrative agency, arbitrator
or governmental body. 
 (f) Action. The Parent Guarantor has all necessary corporate or other power, authority and legal right to
execute, deliver and perform its obligations hereunder; the execution, delivery and performance by the Parent Guarantor of this Guaranty has been duly authorized by all necessary corporate or other action on its part and this Guaranty has been duly
and validly executed and delivered by the Parent Guarantor and constitutes a legal, valid and binding obligation of the Parent Guarantor, enforceable against the Parent Guarantor in accordance with its terms, except as may be limited by bankruptcy,
insolvency, moratorium and other similar laws affecting creditors’ rights and by general principles of equity. 
 (g) Licenses.
The Parent Guarantor holds, and at all times during the term of this Guaranty will hold, all material licenses, certificates, franchises and permits from all governmental authorities necessary for the conduct of its business and has received no
notice of proceedings relating to the revocation of any such license, certificate, franchise or permit which individually or in the aggregate, if the subject of an unfavorable decision, ruling or finding, would materially and adversely affect its
ability to perform its obligations under this Guaranty or any other documents or transactions contemplated hereunder. 
 (h)
Approvals. No authorizations, approvals or consents of, and no filings or registrations with, any Governmental Authority or any securities exchange are necessary for the execution, delivery or performance by the Parent Guarantor hereunder or
for the legality, validity or enforceability hereof. 

  
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 (i) Conditions Precedent. There are no conditions precedent to the effectiveness of
this Guaranty that have not been satisfied or waived. 
 (j) Ownership. Effective on the Effective Date, the Parent Guarantor, is the
legal and beneficial owner of all of the outstanding equity interest in Sunnova Management and is the indirect legal and beneficial owner of all of the outstanding equity interest in the Borrower. 

(k) Taxes. The Parent Guarantor and its subsidiaries have filed all U.S. federal income tax returns and all other material tax returns
that are required to be filed by them and have paid, or have made provision for the payment of, all taxes due pursuant to such returns or pursuant to any assessment received by any of them, except for any such taxes as are being appropriately
contested in good faith by appropriate proceedings diligently conducted and with respect to which adequate reserves have been provided. The charges, accruals and reserves on the books of the Parent Guarantor and its subsidiaries in respect of taxes
and other governmental charges are, in the opinion of the Parent Guarantor, adequate. 
 (l) Foreign Taxes. Neither Parent Guarantor
nor Sunnova Management is aware of any Host Customer under a Solar Service Agreement who has withheld any portion of its payment due under such Solar Service Agreement because of the requirements of a foreign taxing authority, and no foreign taxing
authority has contacted the Parent Guarantor or Sunnova Management concerning a withholding or other tax liability. 
 (m) Investment
Company Act. The Parent Guarantor is not an “investment company” or a company “controlled” by an “investment company” within the meaning of the 1940 Act. 

(n) True and Complete Disclosure. The information, reports, financial statements, exhibits and schedules furnished in writing by or on
behalf of the Parent Guarantor to the Borrower and the Administrative Agent in connection with the negotiation, preparation or delivery of this Guaranty or included herein or therein or delivered pursuant hereto or thereto, when taken as a whole, do
not contain any untrue statement of material fact or omit to state any material fact necessary to make the statements herein or therein, in light of the circumstances under which they were made, not misleading. All written information furnished
after the date hereof by or on behalf of the Parent Guarantor to the Borrower and the Administrative Agent in connection with this Guaranty and the transactions contemplated hereby and thereby will be true, complete and accurate in every material
respect, or (in the case of projections) based on reasonable estimates, on the date as of which such information is stated or certified. 

(o) ERISA. As of the Effective Date and at all times during the term of this Guaranty, (i) each “employee pension
benefit plan,” as such term is defined in Section 3(2) of ERISA, that is sponsored, maintained, or contributed to by the Parent Guarantor or its subsidiaries, other than any such plan that is a “multiemployer plan,” as such
term is defined in Section 3(37) of ERISA, (a “Sunnova Pension Plan”) and, to the knowledge of the Parent Guarantor, each “employee welfare benefit plan,” as such term is defined in Section 3(1) of ERISA,
that is sponsored, maintained or contributed to by the Parent Guarantor or its subsidiaries, is and will be in compliance in all material respects with, and has been and will be administered in all material respects in compliance with, the
applicable provisions of ERISA, the Code and any other Federal or state law; (ii) with respect to any Sunnova Pension Plan that is subject to Section 412 of the 

  
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Code or Section 302 of ERISA, no “accumulated funding deficiency” (as such term is defined in Section 302 of ERISA or Section 412 of the Code), whether or not waived,
exists with respect to any plan year beginning prior to January 1, 2008, and with respect to any plan year beginning after December 31, 2007, no unpaid “minimum required contribution” (as defined in Section 430 of the Code
or Section 303 of ERISA), whether or not waived, exists and, to the knowledge of the Parent Guarantor, no event has occurred or circumstance exists that may result in an unpaid minimum required contribution as of the last day of the
current plan year of any such plan; and (iii) the Parent Guarantor and each of its Commonly Controlled Affiliates has made and will make substantially all contributions required under
each “multiemployer plan,” as such term is defined in Section 3(37) of ERISA, to which the Parent Guarantor or any of its Commonly Controlled Affiliates is obligated to contribute (a “Sunnova
Multiemployer Plan”) and any required contribution that has not been paid would not, individually or in the aggregate, have a material adverse effect. As of the Effective Date, neither the Parent Guarantor nor any of
its Commonly Controlled Affiliates has been notified by the sponsor of a Sunnova Multiemployer Plan that such Sunnova Multiemployer Plan is in reorganization or has been terminated, within the meaning of Title IV of ERISA, except
where such reorganization or termination would not have a material adverse effect. After the Effective Date and at all times during the term of this Guaranty, the aggregate outstanding liability of the Parent Guarantor and its Commonly
Controlled Affiliates for any partial or complete withdrawal from any Multiemployer Plan collectively does not exceed $10 million, and, to the knowledge of the Parent Guarantor, no event has occurred or circumstance exists that presents a risk
that the aggregate outstanding liability of the Parent Guarantor and its Commonly Controlled Affiliates for any partial or complete withdrawal from any Sunnova Multiemployer Plan could collectively exceed $10 million at any time during the
term of this Guaranty. For purposes of this Section 5(o), “Commonly Controlled Affiliates” means those direct or indirect affiliates of the Parent Guarantor that would be considered a single employer with the Parent
Guarantor under Section 414(b), (c), (m), or (o) of the Code. 
 (p) Rank of Obligations. Its obligations under this
Guaranty do rank and will rank at least pari passu in priority of payment and in all other respects with all of its unsecured indebtedness. 

(q) Financial Reporting. The Parent Guarantor shall furnish or cause to be furnished to the Borrower and the Administrative Agent: 

 

	 	(i)	 Annual Reporting. Within one hundred eighty (180) days after the close of each fiscal year of the
Parent Guarantor, the unqualified audited financial statements for such fiscal year that shall include the consolidated balance sheet of the Parent Guarantor and its consolidated subsidiaries, as of the end of such fiscal year, the related
consolidated statements of income, of stockholders’ equity and of cash flows for such fiscal year, in each case, setting forth comparative figures for the preceding fiscal year, and, beginning with the fiscal year ending December 31, 2018,
the assets and liabilities of the Borrower as of the end of such fiscal year presented in a note or schedule to such financial statements of the Parent Guarantor, and in each case prepared in accordance with GAAP and audited by a Nationally
Recognized Accounting Firm selected by the Parent Guarantor; and 

  
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	 	(ii)	 Quarterly Reporting. Within sixty (60) days after the end of each of its fiscal quarters, the
unaudited consolidated balance sheets and income statements for such fiscal quarter on a year-to-date basis for the Parent Guarantor and its consolidated subsidiaries.

 (r) Financial Covenants. As of the Effective Date and at all times during the term of this Guaranty, the
following shall be true (collectively, the “Financial Covenants”): 
  

	 	(i)	 the Parent Guarantor shall have and maintain as of the last day of each fiscal quarter ending after the
Effective Date a Tangible Net Worth (as defined below) of at least the sum of (A) fifty percent (50%) of all positive quarterly net income (as determined in accordance with GAAP) earned for each fiscal quarter ending after the Closing Date as
of such date plus (B) $185,000,000; 

  

	 	(ii)	 the Parent Guarantor shall have and maintain, as of the last day of each fiscal quarter ending after the
Effective Date, Working Capital (as defined below) available to it in an amount at least equal to $20,000,000; provided, however, that from the date hereof through August 31, 2019, the Parent Guarantor shall only be required to have and
maintain, as of the last day of each fiscal quarter ending during such period, Working Capital available to it in an amount at least equal to $5,000,000; and 

  

	 	(iii)	 no distribution with respect to the equity of the Parent Guarantor shall be funded with the proceeds (directly
or indirectly) any Advances made under the Credit Agreement 

 provided that for purposes of determining compliance with the
Financial Covenants in this Section 5(r), on or prior to the date that is fifteen (15) Business Days after the date on which it is determined that the Parent Guarantor is not in compliance with any Financial Covenant (the “Equity
Cure Period”), the Parent Guarantor’s equity holders or any of their Affiliates shall have the right to make and fund an equity investment in the Parent Guarantor in cash during such Equity Cure Period, and such cash, if so designated
by the Parent Guarantor, shall be included as unrestricted cash for purposes of calculating (A) “Tangible Net Worth” in clause (i) above, and (B) to the extent such amounts do not reduce undrawn capacity under equity or debt
facilities included in the calculation, “Working Capital” in clause (ii) above (each such investment of cash, an “Equity Cure”); provided, further, that any actions taken by or with respect to the Parent
Guarantor during the Equity Cure Period in an effort to have the Parent Guarantor comply with the Financial Covenants shall be promptly communicated to the Administrative Agent in writing and no more than (X) one (1) Equity Cure shall be
permitted during each calendar year and (Y) two (2) Equity Cures shall be permitted during the term of Agreement, without advance notice to and consent of the Administrative Agent; provided, further, that so long as the Parent Guarantor
has delivered prior written notice to the Administrative Agent of its intention to exercise an Equity Cure, during the Equity Cure Period no Amortization Event shall be deemed 

  
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to have occurred and neither the Administrative Agent nor any Lender shall exercise any rights or remedies under or arising out of this Section 5(r) or any other Transaction Document on the
basis of any failure to comply with those Financial Covenants as to which notice of intent to exercise an Equity Cure has been delivered; provided, further, that if the Parent Guarantor’s
non-compliance with the Financial Covenants is cured by a permitted Equity Cure made within the Equity Cure Period, no Amortization Event shall be deemed to have occurred. 

For purposes of this Section 5(r), the following terms shall have the meanings set forth below: 

“Mezzanine Facility” shall mean (i) that certain Loan Agreement entered into effective November 14, 2014, as amended,
restated, supplemented or otherwise modified from time to time (the “GSO Facility”), among Sunnova Asset Portfolio 5 Holdings, LLC, the Parent Guarantor, Wilmington Trust, National Association, as administrative agent, and the
lenders from time to time party thereto and (ii) any indebtedness incurred by the Parent Guarantor under any mezzanine financing facility or private high yield notes issuance, the proceeds of which are used to refinance in full the GSO Facility
and otherwise for working capital purposes; provided that the Parent Guarantor shall deliver prior written notice of its intention to enter into such facility or issue such notes not later than ten (10) days prior to the closing of such
facility or issuance of such notes. 
 “Tangible Net Worth” shall mean the amount which, in accordance with GAAP, would be
set forth under the caption “Total Assets” (or any like caption) on a consolidated balance sheet of the Parent Guarantor, less all assets that are considered to be intangible assets under GAAP (including customer lists, goodwill, internal
use software, copyrights, trade names, trademarks, patents, franchises, licenses, unamortized deferred charges, unamortized debt discount and capitalized research and development costs of the Parent Guarantor) less “Total Liabilities” in a
consolidated balance sheet of the Parent Guarantor as reported in each set of quarterly financial statements delivered pursuant to Section 5(q)(ii) above; provided that the amount calculated in Section 5(r)(i) above and the term
“Total Liabilities” shall carve out from the calculation thereof an aggregate principal amount of up to $50,000,000 then outstanding under any Mezzanine Facility as reported in each set of quarterly financial statements delivered pursuant
to Section 5(q)(ii) above. 
 “Working Capital” shall mean, as of any date, the cumulative amount of unrestricted cash
and undrawn capacity under any equity or debt financing arrangement of the Parent Guarantor or any Subsidiary of the Parent Guarantor which is available (taking into account the ability of Guarantor or its applicable Subsidiary to satisfy any
conditions to such availability as demonstrated to the reasonable satisfaction of the Administrative Agent) to pay for the Parent Guarantor’s selling, asset origination and general and administrative expenses. For the avoidance of doubt,
Working Capital shall include any undrawn capacity available (taking into account the ability of Guarantor or its applicable Subsidiary to satisfy any conditions to such availability as demonstrated to the reasonable satisfaction of the
Administrative Agent) for the Parent Guarantor’s general and administrative purposes under any other equity or debt financing arrangement of the Parent Guarantor or any Subsidiary. 

  
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 SECTION 6. Amendments, Etc. No amendment or waiver of any provision of this Guaranty,
and no consent to any departure by the Parent Guarantor here from, shall in any event be effective unless the same shall be in writing and signed by the Parent Guarantor (only with respect to amendments), the Borrower and the Administrative Agent,
and then such waiver or consent shall be effective only in the specific instance and for the specific purpose for which given. 
 SECTION 7.
Addresses for Notices. All notices and other communications hereunder shall be in writing (which shall include facsimile communication), shall be personally delivered, express couriered, electronically transmitted (in which case a hard copy
shall also be sent by regular mail) or mailed by registered or certified mail, if to the Borrower, at the address set forth under its name on the signature page hereof, if to the Administrative Agent, at the address set forth under its name on the
signature page hereof and, if to the Parent Guarantor, at the address set forth under its name on the signature page hereof or, as to any party, at such other address as shall be designated by such party in a written notice to each other party.
Notices and communications by facsimile shall be effective when sent, and notices and communications sent by other means shall be effective when received. 

SECTION 8. No Waiver; Remedies. No failure on the part of the Borrower or the Administrative Agent to exercise, and no delay in
exercising, any right hereunder shall operate as a waiver thereof; nor shall any single or partial exercise of any right hereunder preclude any other or further exercise thereof or the exercise of any other right. The remedies herein provided are
cumulative and not exclusive of any remedies provided by law. 
 SECTION 9. Continuing Guaranty. This Guaranty is a continuing
agreement and shall, to the maximum extent permitted by Applicable Law: 
 (a) remain in full force and effect until the performance in full
of the Obligations and the payment of all other amounts payable under the other Transaction Documents; 
 (b) be binding upon the Parent
Guarantor, its successors and assigns; and 
 (c) inure to the benefit of, and be enforceable by, the Borrower, the Administrative Agent and
their successors and assigns. 
 Notwithstanding anything contained in this Section 9 to the contrary, it is specifically agreed
and is a condition of and inducement to the Parent Guarantor to enter into this Guaranty, that all Obligations and performances, liabilities and duties of the Parent Guarantor with respect to Sunnova Management as the Facility Administrator and its
obligations under the Facility Administration Agreement, shall cease, terminate and be of no further force or effect immediately upon (i) the termination or the resignation of Sunnova Management as the Facility Administrator and (ii) the
appointment of any Successor Facility Administrator. 
 SECTION 10. Release of the Parent Guarantor. In the event that (a) the
Parent Guarantor ceases to control (within the meaning of the Securities Act) Sunnova Management and the Borrower, (b) a Facility Administrator Termination Event has not occurred, (c) the new controlling person has agreed to assume the
obligations of the Parent Guarantor hereunder, (d) 

  
 11 

 
the Parent Guarantor shall have received the written consent of the Administrative Agent, and (e) the Parent Guarantor and such new controlling person shall have executed documents and
provided opinions of counsel reasonably requested by the Administrative Agent, then the Parent Guarantor shall be permitted to assign its obligations hereunder to such new controlling person, and upon such assignment, this Guaranty shall terminate
with respect to the Parent Guarantor and the Parent Guarantor shall be released from its obligations hereunder without the necessity of any further action of the parties to this Guaranty. 

SECTION 11. GOVERNING LAW; WAIVER OF JURY TRIAL. THIS GUARANTY WILL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE
STATE OF NEW YORK, WITHOUT GIVING EFFECT TO PRINCIPLES OF CONFLICTS OF LAW OTHER THAN SECTIONS 5-1401 AND 5-1402 OF THE GENERAL OBLIGATIONS LAW OF THE STATE OF NEW YORK.
EACH PARTY HERETO HEREBY AGREES TO THE JURISDICTION OF ANY FEDERAL COURT LOCATED WITHIN THE STATE OF NEW YORK, AND WAIVES PERSONAL SERVICE OF ANY AND ALL PROCESS UPON IT AND CONSENTS THAT ALL SUCH SERVICE OF PROCESS BE MADE BY CERTIFIED MAIL, RETURN
RECEIPT REQUESTED, DIRECTED TO SUCH PARTY AT THE ADDRESS SET FORTH ON THE SIGNATURE PAGE HEREOF, AND SERVICE SO MADE SHALL BE DEEMED TO BE COMPLETED WHEN THE RETURN RECEIPT IS SIGNED. EACH PARTY HERETO HEREBY WAIVES ANY RIGHT TO HAVE A JURY
PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER SOUNDING IN CONTRACT, TORT OR OTHERWISE, BETWEEN THE PARENT GUARANTOR AND THE BORROWER OR THE AGENT, ARISING OUT OF, CONNECTED WITH, RELATED TO, OR INCIDENTAL TO THE RELATIONSHIP BETWEEN THEM IN
CONNECTION WITH THIS GUARANTY. INSTEAD, ANY DISPUTE RESOLVED IN COURT WILL BE RESOLVED IN A BENCH TRIAL WITHOUT A JURY. WITH RESPECT TO THE FOREGOING CONSENT TO JURISDICTION, EACH PARTY HERETO HEREBY WAIVES ANY OBJECTION BASED ON FORUM
NON CONVENIENS, AND ANY OBJECTION TO VENUE OF ANY ACTION INSTITUTED HEREUNDER AND CONSENTS TO THE GRANTING OF SUCH LEGAL OR EQUITABLE RELIEF AS IS DEEMED APPROPRIATE BY THE COURT. NOTHING IN THIS SECTION 11 SHALL AFFECT THE RIGHT OF
ANY PARTY TO SERVE LEGAL PROCESS IN ANY OTHER MANNER PERMITTED BY LAW OR AFFECT THE RIGHT OF THE PARENT GUARANTOR, THE BORROWER OR THE AGENT TO BRING ANY ACTION OR PROCEEDING AGAINST ANY OTHER PARTY HERETO OR ITS PROPERTY IN THE COURTS OF ANY OTHER
JURISDICTION. 
 SECTION 12. No Proceeding; Effects of Bankruptcy. The Parent Guarantor hereby agrees that it will not, directly or
indirectly, institute or cause to be instituted, or join any Person in instituting, against the Borrower, any bankruptcy, reorganization, arrangement, insolvency or liquidation proceedings, or other proceedings under any federal or state bankruptcy
or similar law so long as there shall not have elapsed one year plus one day after payment in full of the Obligations (not as defined herein, but as defined in the Credit Agreement). To the extent permitted by law, this Guaranty shall survive the
occurrence of any bankruptcy with respect to Sunnova Management, the Borrower or any other Person. To the extent permitted by law, no automatic stay under the Bankruptcy Code or other federal, state or other applicable bankruptcy, insolvency or
reorganization statutes to which Sunnova Management or the Borrower is subject shall postpone the obligations of the Parent Guarantor under this Guaranty. 

  
 12 

 SECTION 13. Counterparts. This Guaranty may be executed in
counterparts, each of which when so executed shall be an original, but all of which together shall constitute but one and the same agreement. Delivery of an executed counterpart of this Guaranty by facsimile or other electronic transmission (i.e.,
“pdf” or “tif”) shall be effective as delivery of a manually executed counterpart hereof and deemed an original. 

[Signature Page Follows] 

  
 13 

 IN WITNESS WHEREOF, the Parent Guarantor has caused this Guaranty to be duly executed and
delivered by its officer thereunto duly authorized as of the date first above written. 
  

			
	SUNNOVA ENERGY CORPORATION
		
	By:	 	/s/ Christopher Smith
	Name:	 	Christopher Smith
	Title:	 	Senior Vice President, Head of Finance and Treasurer
	Address:	 	 20 Greenway Plaza
 Suite 475

Houston, TX 77046

  
 [Signature Page to
Amended and Restated Parent Guaranty] 

 Acknowledged and Agreed: 
  

			
	SUNNOVA TEP II HOLDINGS, LLC, as Borrower
		
	By:	 	/s/ Christopher Smith
	Name:	 	Christopher Smith
	Title:	 	Senior Vice President, Head of Finance and Treasurer
	Address:	 	 20 Greenway Plaza
 Suite 475

Houston, TX 77046

  
 [Signature Page to
Amended and Restated Parent Guaranty] 

			
	 CREDIT SUISSE AG, NEW YORK BRANCH,

as Administrative Agent

		
	By:	 	/s/ Patrick Duggan
		 	Name: Patrick Duggan
		 	Title:   Vice President
		
	By:	 	/s/ Jeffrey Traola
		 	Name: Jeffrey Traola
		 	Title:   Director
		
		 	 Address:    11 Madison Avenue,
4th Floor
 New York, NY 10010

Attention: Asset Finance

  
 [Signature Page to
Amended and Restated Parent Guaranty]EX-10.12

 Exhibit 10.12 

Execution Version 
 THE
SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 OR ANY STATE SECURITIES LAWS, AND HAVE BEEN ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE SALE OR DISTRIBUTION THEREOF.
NO SUCH SALE OR DISTRIBUTION MAY BE EFFECTED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT OR AN AVAILABLE EXEMPTION UNDER THE SECURITIES ACT OF 1933 AND COMPLIANCE WITH STATE SECURITIES LAWS. 

SUBORDINATED CONVERTIBLE PROMISSORY NOTE 

(Bridge Loan Note – Sunnova) 

$15,000,000.00 (plus any amounts owing in respect of PIK Interest as set forth on Schedule I) 

Effective as of June 28, 2019 

New York, New York 
 FOR VALUE
RECEIVED, Sunnova Energy Corporation, a Delaware corporation (“Maker”), having a notice address of 20 E. Greenway Plaza, Suite 475, Houston, Texas 77046, hereby promises to pay pursuant to this promissory note (this
“Note”) to Energy Capital Partners III, LP, Energy Capital Partners III-A, LP, Energy Capital Partners III-B, LP, Energy Capital Partners III-C, LP, Energy Capital Partners III-D, LP, Energy Capital Partners III (Sunnova Co-Invest), LP, QSIP LP, Elk Mountain, Ltd., Minion
Trail, Ltd., FS Energy and Power Fund, MTP Energy Master Fund Ltd, Portcullis Partners, LP, The Board of Trustees of the Leland Stanford Junior University (DAPER II), Rebecca Rabinow Management Trust, 1811 Pesikoff Family Trust, Richard A. Rabinow,
Fayez Sarofim and FSI No. 2 Corporation (collectively, the “Holders” and, each individually, a “Holder”), on the earlier of (i) the first date on which all of the 9.50% Senior Secured Convertible Notes due
2021, including any notes issued in payment of PIK interest thereon, (the “2021 Notes”) issued pursuant to the Indenture, dated as of April 24, 2017 (as amended as of April 5, 2019 and, as further amended, amended and
restated, supplemented or otherwise modified from time to time, the “Indenture”), by and between the Company and Wilmington Trust, National Association, as trustee (the “2021 Notes Trustee”) and collateral trustee,
have been repaid in full and are no longer outstanding unless this Note would otherwise be converted into Series C Preferred Stock on such date, and (ii) September 30, 2021 (such date being referred to as the “Maturity
Date”), the principal amounts set forth on Schedule I hereto next to each such Holder’s name, together with any and all accrued and unpaid interest on such outstanding principal amounts; provided, that,
notwithstanding the foregoing all amounts payable hereunder shall become immediately due and payable upon the institution of, or material development under, bankruptcy proceedings under the U.S. Bankruptcy Code or similar proceedings under state or
federal law with respect to the Maker (subject to the Subordination Provisions (as defined below)). 
 Interest shall accrue from the
effective date hereof until the entire balance is paid (or converted, as provided below) on the unpaid principal balance of this Note at the interest rate (“Interest Rate”) of twelve percent (12%) per annum. Interest shall be paid
quarterly in arrears on March 31, June 30, September 30 and December 31 of each year, until and including the Maturity Date, or if any such day is not a Business Day, on the next succeeding Business Day (each, an
“Interest Payment Date”). Interest on the Notes shall accrue from the most recent Interest Payment Date or, if no interest has been paid, from the date of issuance. Interest will be computed on the basis of a 360-day year comprised of twelve 30-day months. At all times prior to the repayment of the 2021 Notes, interest shall be payable solely by increasing the then outstanding
principal amount of this Note by the entire amount of the interest payment due on the applicable Interest 

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
Payment Date (“PIK Interest”). Following an increase in the principal amount of this Note on the applicable Interest Payment Date by the amount of the PIK Interest, this Note
will bear interest on such increased principal amount from and after such Interest Payment Date. For clarity, unless the context otherwise requires, references to any principal amount of this Note includes any increase in the principal amount of
this Note as a result of the payment of PIK Interest. Upon the occurrence of the Maturity Date, all unpaid principal, accrued interest and other amounts owing hereunder shall be immediately due, payable and collectible by the Holders pursuant to
applicable law. This Note shall not, under any circumstances, be payable in cash, except on and after the repayment in full of the 2021 Notes. 

Notwithstanding any provision to the contrary herein, Maker may not, at any time, prepay all or any portion of this Note, except in connection
with any conversion into shares of the Company’s Series C Convertible Preferred Stock pursuant to the terms hereof. 
 Unless earlier
converted, on and after the Maturity Date, an amount equal to the principal amount of this Note and any accrued and unpaid interest, in each case, as of the Maturity Date, shall be payable in lawful money of the United States of America and in
immediately available funds at the office of each Holder set forth on Schedule I, unless another place of payment shall be specified in writing by a Holder to Maker. Notwithstanding the foregoing, (i) upon and subject to the affirmative
written election of the Majority Holders (as defined below) delivered to the Maker not later than five (5) business days prior to the date of conversion or (ii) automatically and immediately prior to a Qualified IPO (as defined below)
without any further action required on the part of either the Holder or the Maker, the entire balance then outstanding hereunder shall be converted into that number of shares of the Company’s Series C Convertible Preferred Stock as is equal to
(i) an amount equal to the principal amount of this Note and any accrued and unpaid interest, in each case, as of the date of conversion, divided by (ii) the lesser of $5.80 (as appropriately adjusted for any stock splits, combinations,
recapitalizations or the like affecting the Series C Convertible Preferred Stock after the date hereof) and the Conversion Price. Notwithstanding anything to the contrary herein, until the expiration or termination of any applicable waiting period
under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 with respect to the acquisition of the Company’s Series C Convertible Preferred Stock as contemplated by this Note (the “HSR Act Approval”), no Holder shall be
entitled to exercise its conversion rights described above. 
 For purposes of this Note, (i) the term “Conversion
Price” shall mean an amount equal to the lowest purchase price per share of Series C Convertible Preferred Stock issued at any time from and after the date of this Note and until the date of conversion and (ii) the term “Qualified
IPO” shall mean any sale of common stock of the Maker pursuant to an underwritten public offering registered under applicable securities laws (A) for which the aggregate gross cash proceeds to be received by the Maker from such offering
(without deducting underwriting discounts, expenses and commissions) are at least $175,000,000 at a per share public offering price of at least $6.6558 (subject to appropriate adjustment in the event of any stock dividend, stock split, combination
or similar recapitalization affecting any shares of common stock of the Maker) and (B) pursuant to which the common stock of the Maker is listed for trading on the New York Stock Exchange, the Nasdaq Global Select Market or the Nasdaq Global
Market. 
 Anything in this Note to the contrary notwithstanding, the Maker hereby covenants and agrees, and the Holders likewise hereby
covenant and agree, that the indebtedness and all other obligations, whether now or hereafter outstanding, of the Maker under this Note (the “Subordinated Debt”) shall be junior and subordinate to the extent and in the manner set
forth in clauses (a) through (m) below (collectively, the “Subordination Provisions”) to the Maker’s Obligations (as defined in the Indenture), whether now or hereafter outstanding with respect to the 2021 Notes and
related documents (the “Senior Indebtedness”). 

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

  
 2 

 (a) The Subordinated Debt is subordinated in all respects and subject in
right of payment to the Senior Indebtedness such that the (i) payment in full, in cash of the principal of and interest and fees (including interest and fees accruing during the pendency of any insolvency or liquidation proceeding) regardless
of whether allowed or allowable in an Insolvency Proceeding (as defined below) on the Senior Indebtedness and regardless of whether then due or payable and (ii) payment in full, in cash of all other Senior Indebtedness that is then due and
payable or otherwise accrued and owing at or prior to the time such principal and interest are paid (including any contingent indemnification obligations to the extent then asserted) (the “Payment in Full”) of the Senior
Indebtedness shall occur before any Holder is entitled to receive any payment or distribution on account of the Subordinated Debt of assets, properties or cash of Maker or any other person of any kind or character, whether (A) a payment,
purchase or other acquisition or retirement for cash, property or securities (other than PIK Interest in respect of this Note) or (B) by way of cancellation, forgiveness or offset of the indebtedness owing by Maker against any indebtedness owed
by any Holder or (C) payable or deliverable by reason of the payment of any other indebtedness of Maker being subordinated to the payment of this Note and, in any case, shall include any assets of any kind or character received by the Holders
in connection with the realization of any security for this Note (each, a “Distribution”) (including interest (other than PIK Interest)) on account of the Subordinated Debt and, in that connection, unless and until the Payment in
Full of the Senior Indebtedness occurs, no payment or Distribution (including interest (other than PIK Interest)) with respect to this Note shall be made by or on behalf of the Maker; provided, that, nothing in this clause (a) or any
other provision of this Note shall be construed to prohibit the refinancing, replacement or repayment of all or any portion of the unpaid principal balance of this Note with (or the conversion of all of any portion of the unpaid principal balance of
this Note into) common or non-“disqualified preferred” (as customarily defined) equity interests of Maker. No Holder shall initiate or cooperate or join with any other person in any proceeding
challenging (1) the validity or enforceability of any documents in connection with the Senior Indebtedness or any indebtedness governed thereby, (2) any payment or distribution received by any holder of Senior Indebtedness or any agent
therefor (each, a “Senior Debtholder”) for application to all or any part of the Senior Indebtedness or (3) the existence, validity, perfection or priority of any actual or purported lien claimed by any Senior Debtholder in any
collateral or any other property in which Maker has rights from time to time. 
 (b) In the event of any insolvency,
bankruptcy or receivership case or proceeding or any dissolution, winding up, liquidation, reorganization or other similar proceedings relative to Maker or its assets (whether voluntary or involuntary and whether in bankruptcy, insolvency or
receivership proceedings or otherwise) or upon an assignment for the benefit of creditors, or any other marshaling of the assets of Maker or its assets (each of the foregoing, an “Insolvency Proceeding”), then Payment in Full shall
occur before the Holders shall be entitled to receive or retain any payment or Distribution (including interest (other than PIK Interest)) with respect to this Note. In any such proceedings, any payment or Distribution (including interest
(other than PIK Interest)) to which the Holders would be entitled if this Note and the Subordinated Debt were not subordinated to the Senior Indebtedness shall be paid by the Maker or by the agent or other person making such payment or distribution,
or by the Holders if and to the extent received by the Holders, directly to the 2021 Notes Trustee to be allocated as set forth in the terms of the Senior Indebtedness or if not so allocated, pro rata based on the outstanding principal amount
thereof. Following commencement of and during the continuance of an Insolvency Proceeding, each of the Holders may (i) prove its claim or, if applicable, its interest, in the Subordinated Debt, (ii) file any necessary responsive or
defensive pleadings in opposition to any motion, claim, adversary proceeding or other pleading objecting to, or otherwise seeking the disallowance of, the amounts due under this Note or otherwise impairing any of the Holders’ rights under this
Note or, except as otherwise limited or prohibited by the Subordination Provisions, file any motions pertaining to the Subordinated Debt, and (iii) vote on any plan of reorganization or other dispositive plan that is consistent with the rights
and priorities of the Senior Debtholders under the Subordination Provisions. Nothing in this 

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

  
 3 

 
clause (b) or any other provision of this Note shall be construed to prohibit the refinancing, replacement or repayment of all or any portion of the amounts due under this Note with (or the
conversion of all of any portion of the amounts due under this Note into) common equity or non-“disqualified preferred” equity interests of Maker pursuant to this clause (b). 

(c) Until the Payment in Full of Senior Indebtedness, if any Holder receives any payment or Distribution (including interest
but excluding PIK Interest) in respect of the Subordinated Debt, then such payment or Distribution shall be promptly paid over or delivered to 2021 Notes Trustee with any necessary endorsement and the payment shall be deemed never to have been made
in respect of the Subordinated Debt. 
 (d) The Holders shall not exercise any rights or remedies under this Note, including,
without limitation, any action (A) to take from or for the account of the Maker or any other person, by set-off or in any other manner, the whole or any part of any moneys which may now or hereafter be
owing by the Maker or any such person with respect to the Senior Indebtedness or the Subordinated Debt (including but not limited to the amounts due on account of this Note), (B) to sue for payment of the Senior Indebtedness or the Subordinated
Debt, or to initiate or participate with others in any suit, action or proceeding against the Maker or any other person to (i) enforce payment of or to collect the whole or any part of the amounts due with respect to the Senior Indebtedness or
the Subordinated Debt or (ii) commence judicial enforcement of any of the rights and remedies under the 2021 Notes (or other applicable loan or credit agreement) or applicable law with respect to the Senior Indebtedness or under this Note or
applicable law with respect to the amounts due hereunder or thereunder, (C) to accelerate the Senior Indebtedness (or any portion thereof) or the Subordinated Debt (or any portion thereof), (D) to cause the Maker to honor any redemption or
mandatory prepayment obligation related to this Note, or (E) to take any action under the provisions of any state or federal law, including, without limitation, the Uniform Commercial Code, or under any contract or agreement, to enforce,
foreclose upon, take possession of or sell any property or assets of the Maker or any other person, including the collateral securing the Senior Indebtedness (each, an “Enforcement Action”), until Payment in Full has
occurred. Notwithstanding anything in this Note to the contrary, whether or not any Senior Indebtedness is outstanding: (1) the Holders may file proofs of claim and statements of interest against Maker in any Insolvency Proceeding in a
manner consistent with the Subordination Provisions; (2) the Holders may take any action required to toll the expiration of any statute of limitation; and (3) take any other actions to preserve or protect the validity and enforceability of
rights of the Holders with respect to the Subordinated Debt not expressly prohibited in these Subordination Provisions. Any distributions or other proceeds of any Enforcement Action obtained by or for the benefit of the Holders shall in any
event be held in trust by it for the benefit of the 2021 Notes Trustee and promptly paid or delivered to the 2021 Notes Trustee in the form received until Payment in Full has occurred. 

(e) Until Payment in Full, each Holder hereby acknowledges and agrees that any Senior Debtholder may at any time and from time
to time without the consent of or notice to any Holder, and without incurring responsibility to any Holder or impairing or releasing the subordination provided in the Subordination Provisions or the obligations hereunder of any Holder to any Senior
Debtholder, do any one or more of the following: (i) extend, renew, modify, waive or amend the terms of any Senior Indebtedness; (ii) sell, exchange, release or otherwise deal with any property pledged, mortgaged or otherwise securing
Senior Indebtedness; (iii) release any guarantor or any other person liable in any manner for Senior Indebtedness or amend or waive the terms of any guaranty of Senior Indebtedness; (iv) exercise or refrain from exercising any rights
against Maker or any other person; (v) apply any sums by whomever paid or however realized to Senior Indebtedness; (vi) change the manner, place or terms of payment or extend the time of 

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

  
 4 

 
payment of, or renew or alter, Senior Indebtedness or any instrument evidencing the same or any agreement under which Senior Indebtedness is outstanding or secured; and (vii) take any other
action which otherwise might be deemed to impair the rights of the Senior Debtholders. Any and all of such actions may be taken by the Senior Debtholders without incurring responsibility to any Holder and without impairing or releasing the
obligations of any Holder to the Senior Debtholders. 
 (f) Any subsequent Holder of this Note agrees, by its acceptance
hereof, that obligations of the Maker hereunder are junior and subordinate to the Senior Indebtedness to the extent and in the manner set forth in the Subordination Provisions. 

(g) No right of any present or future Senior Debtholder to enforce subordination as provided in the Subordination Provisions
will at any time in any way be prejudiced or impaired by any act or failure to act on the part of Maker or by any act or failure to act, in good faith, by any Senior Debtholder, or by any noncompliance by Maker with the terms of this Note regardless
of any knowledge thereof that any such Senior Debtholder may have or otherwise be charged with. The Subordination Provisions are intended to be for the benefit of, and shall be enforceable directly by, the 2021 Notes Trustee or any Senior
Debtholder, and no other person other than the 2021 Notes Trustee, any Senior Debtholder or the parties hereto shall have or be entitled to assert rights or benefits hereunder. 

(h) Until Payment in Full, so long as any Senior Indebtedness is outstanding, in the event that any Holder shall fail to file a
proof of claim following any Insolvency Proceeding of Maker within 5 days prior to the deadline to file proofs of claim in the applicable Insolvency Proceeding, such Holder shall irrevocably appoint the 2021 Notes Trustee as its attorney in fact,
and grant the 2021 Notes Trustee a power of attorney with full substitution, in the name of Holder, for the use and benefit of the Senior Debtholders, to file such proof of claim on its behalf in connection with such Insolvency Proceeding. 

(i) Until Payment in Full, if, in any Insolvency Proceeding, debt obligations of the reorganized debtor secured by liens upon
any property of the reorganized debtor are distributed, pursuant to a plan of reorganization or similar dispositive restructuring plan, on account of both the Senior Indebtedness and the Subordinated Debt, then, to the extent the debt obligations
distributed on account of the Senior Indebtedness and on account of the Subordinated Debt are secured by liens upon the same assets or property, the Subordination Provisions will survive the distribution of such debt obligations pursuant to such
plan and will apply with like effect to the liens securing such debt obligations. 
 (j) Following the Payment in Full of the
Senior Indebtedness, the Holders shall be subrogated to the rights of the Senior Debtholders (or their agent or representative) to receive payments and distributions of cash, property and securities applicable to the Senior Indebtedness until the
principal of, and interest on, and all other amounts in respect of, the Subordinated Debt shall be paid in full; however, such right of subrogation shall not be exercised as to any collateral or other property acquired prior to Payment in Full by
the 2021 Notes Trustee, the Senior Debtholders or their respective affiliates in connection with an Enforcement Action or an Insolvency Proceeding. For purposes of such subrogation, no payments or distributions to the Senior Debtholders (or
their agent or representative) of any cash, property or securities to which the Holders would be entitled except for these Subordination Provisions, and no payments over pursuant to these Subordination Provisions to the Senior Debtholders (or their
agent or representative) by the Holders, shall be deemed to be a payment or distribution by Maker to or on account of the Senior Indebtedness except to the extent constituting such a payment or distribution pursuant to the terms of the Indenture or
constituting a Payment In Full; it being understood and agreed that the Subordination Provisions are solely for the purpose of defining the relative rights of the Senior Debtholders (or their agent or representative) on the one hand, and the Holders
on the other hand. 

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

  
 5 

 (k) Until Payment in Full has occurred, no amendment or waiver of any
provision of this Note, shall directly or indirectly (s) modify the Subordination Provisions, (t) increase the Interest Rate in respect of the Subordinated Debt, (u) shorten the scheduled final maturity of the Subordinated Debt,
(v) modify the principal repayment or prepayment provisions of the Subordinated Debt in a manner that would require a repayment or prepayment not required as of the date hereof, (w) change any covenants, defaults, or events of default
(including the addition of covenants, defaults, or events of default not contained in the Note as in effect on the date hereof) to restrict Maker from making payments in respect of any Senior Indebtedness, (x) increase the principal balance of
the Subordinated Debt (other than as a result of the accrual of interest, accretion or the payment of PIK Interest pursuant to the terms of the Note as in effect as of the date hereof), or (y) convert the payment of any accrual or PIK Interest
to cash pay interest, in each case, without the prior written consent of the 2021 Notes Trustee and each of the Senior Debtholders. Until Payment in Full has occurred, Maker shall not grant (and no Holder shall accept the benefit of) a lien or
security interest on any collateral to secure any portion of the Subordinated Debt. 
 (l) For the avoidance of doubt,
nothing herein shall: (i) impair, as between the Maker and the Holders, the obligation of the Maker, which is absolute and unconditional, to pay principal of and interest on the Note as set forth herein; or (ii) affect the relative rights
of the Holders and creditors of the Maker other than their rights in relation to the Senior Debtholders. 
 (m) No implied
covenants or obligations shall be read into this Note against the 2021 Notes Trustee. The 2021 Notes Trustee shall not be deemed to owe any fiduciary duty to the Holders as a result of this Note and the 2021 Notes Trustee shall not be liable to any
Holder of Notes if it shall pay over or deliver to holders of the 2021 Notes, the Issuer or any other Person money or assets which are delivered to the 2021 Notes Trustee hereunder. 

Any waiver shall be in writing and effective against a Holder if signed by the applicable Holder. No delay or omission on the part of the
Holders in exercising any right shall operate as a waiver of such right or any other right. A waiver on any one occasion shall not be construed as a bar to or waiver of any right on any future occasion. All rights and remedies of the Holders with
respect to this Note and the obligations hereunder, whether evidenced hereby or by any other instrument or papers, shall be cumulative and may be exercised singularly, alternatively, successively or concurrently at such time or at such times as the
Holders deems expedient. 
 The Holders shall not have the right to transfer or assign any of their rights or obligations under this Note
without the prior written consent of the Maker and any proposed assignment or transfer without consent shall be void ab initio; provided, however, that transfers or assignments of this Note (but not increases in principal amount, other than
as the result of PIK Interest) shall be permitted (i) to holders of Series A Common Stock, Series A Convertible Preferred Stock and Series C Convertible Preferred Stock that is required pursuant to Section 4.1(g) of that certain Third
Amended and Restated Investors Agreement, dated as of March 29, 2018, by and among the Maker and certain other parties thereto (as amended, amended and restated, supplemented or otherwise modified from time to time, the “Investors
Agreement”) or (ii) to Energy Capital Partners III (Sunnova Co-Invest), LP or any other Permitted Transferee, as defined in and in accordance with the Investors Agreement. 

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

  
 6 

 This Note and all obligations of Maker hereunder shall be binding upon the successors and
assigns of Maker, and shall, together with the rights and remedies of the Holders, inure to the benefit of each Holder, any future holder of any of the indebtedness and their respective successors and assigns. This Note may be amended by the Maker
and Holders holding a majority of the then outstanding principal amount under this Note (the “Majority Holders”). Notwithstanding the foregoing, (a) no amendment or waiver of the terms of this Note shall be effective if such
amendment or waiver would have a disproportionate and adverse effect on any Holder unless each such disproportionately and adversely affected Holder has consented in writing to such amendment or waiver, (b) the Interest Rate and Maturity Date
cannot be amended without the written consent of all Holders and (c) the principal amount owed to a Holder under this Note cannot be amended without such Holder’s written consent. 

The Maker and the Holders intend to comply at all times with applicable usury laws. If at any time such laws would render usurious any
amounts due under this Note under applicable law, then it is Maker’s and the Holders’ express intention that (i) the Maker not be required to pay interest on this Note at a rate in excess of the maximum lawful rate, (ii) that the
provisions of this paragraph shall control over all other provisions of this Note which may be in apparent conflict hereunder, (iii) that such excess amount shall be immediately credited to the principal balance of this Note, and (iv) the
provisions hereof shall immediately be reformed and the amounts thereafter decreased, so as to comply with the then applicable usury law, but so as to permit the recovery of the fullest amount otherwise due under this Note. 

THIS NOTE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. Maker agrees that any suit for the
enforcement of this Note may be brought in the courts of the State of New York or any federal court sitting therein and consents to the non-exclusive jurisdiction of such court and to service of process in any
such suit being made upon Maker by mail at the address specified in the first paragraph of this Note (or such other address as Maker may provide written notice of to the Holders). Maker hereby waives any objection that it may now or hereafter have
to the venue of any such suit or any such court or that such suit is brought in an inconvenient court. 
 EACH PARTY HERETO WAIVES ITS RIGHT
TO A JURY TRIAL WITH RESPECT TO ANY ACTION OR CLAIM ARISING OUT OF ANY DISPUTE IN CONNECTION WITH THIS NOTE, ANY RIGHTS OR OBLIGATIONS HEREUNDER OR THE PERFORMANCE OF ANY SUCH RIGHTS OR OBLIGATIONS. Except as prohibited by law, Maker waives any
right which it may have to claim or recover in any litigation referred to in the preceding sentence any special, exemplary, punitive or consequential damages or any damages other than, or in addition to, actual damages. Each party (i) certifies
that neither the other parties nor their respective representatives, agents or attorneys has represented, expressly or otherwise, that such party would not, in the event of litigation, seek to enforce the foregoing waivers and (ii) acknowledges
that, in entering into this Note, each party is relying upon, among other things, the waivers and certifications contained in this Note. 

If any term of this Note shall be held to be invalid, illegal or unenforceable, the validity of all other terms hereof shall in no way be
affected thereby, and this Note shall be construed and be enforceable as if such invalid, illegal or unenforceable term had not been included herein. This Note may be executed in any number of counterparts and by different parties hereto in separate
counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement. Delivery of an executed counterpart of a signature page to this Note by facsimile or by
electronic portable document format shall be effective as delivery of a manually executed counterpart of this Note. 
 [Signature Pages to
Follow] 

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

  
 7 

 IN WITNESS WHEREOF, the Maker has executed and delivered this Note on June 28,
2019. 
  

			
	SUNNOVA ENERGY CORPORATION
		
	By:	 	 /s/ Robert L. Lane

			
	Name:	 	Robert L. Lane
	Title:	 	Executive Vice President and Chief Financial Officer

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
					
	ACCEPTED:
	
	ENERGY CAPITAL PARTNERS III, LP
	By:	 	Energy Capital Partners GP III, LP
	Its:	 	General Partner
			
		 	By:	 	Energy Capital Partners III, LLC
		 	Its:	 	General Partner
			
		 	By:	 	ECP ControlCo, LLC
		 	Its:	 	managing member

  

			
		
	By:	 	/s/ Rahman D’Argenio
		 	Name: Rahman D’Argenio
		 	Title: Partner

  

					
	ENERGY CAPITAL PARTNERS III-A, LP
	By:	 	Energy Capital Partners GP III, LP
	Its:	 	General Partner
			
		 	By:	 	Energy Capital Partners III, LLC
		 	Its:	 	General Partner
			
		 	By:	 	ECP ControlCo, LLC
		 	Its:	 	managing member

  

			
		
	By:	 	/s/ Rahman D’Argenio
		 	Name: Rahman D’Argenio
		 	Title: Partner

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
					
	
	ENERGY CAPITAL PARTNERS III-B, LP
	By:	 	Energy Capital Partners GP III, LP
	Its:	 	General Partner
			
		 	By:	 	Energy Capital Partners III, LLC
		 	Its:	 	General Partner
			
		 	By:	 	ECP ControlCo, LLC
		 	Its:	 	managing member

 
			
		
	By:	 	/s/ Rahman D’Argenio
		 	Name: Rahman D’Argenio
		 	Title: Partner

  

					
	
	ENERGY CAPITAL PARTNERS III-C, LP
	By:	 	Energy Capital Partners GP III, LP
	Its:	 	General Partner
			
		 	By:	 	Energy Capital Partners III, LLC
		 	Its:	 	General Partner
			
		 	By:	 	ECP ControlCo, LLC
		 	Its:	 	managing member

  

			
		
	By:	 	/s/ Rahman D’Argenio
		 	Name: Rahman D’Argenio
		 	Title: Partner

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
					
	
	ENERGY CAPITAL PARTNERS III-D, LP
	By:	 	Energy Capital Partners GP III, LP
	Its:	 	General Partner
			
		 	By:	 	Energy Capital Partners III, LLC
		 	Its:	 	General Partner
			
		 	By:	 	ECP ControlCo, LLC
		 	Its:	 	managing member

  

			
		
	By:	 	/s/ Rahman D’Argenio
		 	Name: Rahman D’Argenio
		 	Title: Partner

  

					
	
	ENERGY CAPITAL PARTNERS III (SUNNOVA CO-INVEST), LP
	By:	 	Energy Capital Partners GP III, LP
	Its:	 	General Partner
			
		 	By:	 	Energy Capital Partners III, LLC
		 	Its:	 	General Partner
			
		 	By:	 	ECP ControlCo, LLC
		 	Its:	 	managing member

  

			
		
	By:	 	/s/ Rahman D’Argenio
		 	Name: Rahman D’Argenio
		 	Title: Partner

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
			
	QSIP LP
	By:	 	Strategic Capital Investment Partners, LP
	Its:	 	Investment Manager

 
					
		
	By:	 	/s/ David Taylor
		 	Name:	 	David Taylor
		 	Title:	 	COO / GC

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

  

					
	FS ENERGY AND POWER FUND
		
	By:	 	/s/ Sean Coleman
		 	Name:	 	Sean Coleman
		 	Title:	 	Authorized Signatory

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
							
	ELK MOUNTAIN, LTD.
	By: Gordy Oil Company, its general partner
		
	By: 	 	 /s/ Russell D. Gordy

		 	Name:	 	Russell D. Gordy
		 	Title:	 	President

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
			
	MINION TRAIL, LTD.
	By: Elk Mountain Ltd., its general partner
	
	By: Gordy Oil Company, its general partner
		
	By: 	 	 /s/ Russell D. Gordy

		 	Name: Russell D. Gordy
		 	Title: President

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
			
	MTP ENERGY MASTER FUND LTD
		
	By:	 	MTP Energy Management LLC Its Investment Manager
		
	By:	 	Magnetar Financial LLC Its Sole Member

  

			
		
	By: 	 	 /s/ Michael Turro

		 	Name: Michael Turro
		 	Title: Chief Compliance Officer

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
			
	PORTCULLIS PARTNERS, LP
	By:	 	Portcullis G.P., LLC, Its general partner

 
					
		
	By: 	 	 /s/ Duane G. Kelley

		 	Name:	 	Duane G. Kelley
		 	Title:	 	Vice President

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
					
	THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY (DAPER II)
		
	By: 	 	 /s/ Sabrina Liang

		 	Name:	 	Sabrina Liang
		 	Title:	 	Director, Separate Investments

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
					
	REBECCA RABINOW MANAGEMENT TRUST
		
	By: 	 	 /s/ Richard A. Rabinow

		 	Name:	 	Richard A. Rabinow
		 	Title:	 	Trustee

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
					
	1811 PESIKOFF FAMILY TRUST
		
	By: 	 	/s/ David Pesikoff
		 	Name:	 	David Pesikoff
		 	Title:	 	Trustee

  

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
	
	
	/s/ Richard A. Rabinow
	Richard A. Rabinow

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
	
	
	/s/ Fayez Sarofim
	Fayez Sarofim

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 
			
	FSI NO. 2 CORPORATION
		
	By:	 	/s/ Fayez Sarofim

 
			
	Name:	 	Fayez Sarofim

 
			
	Title:	 	President

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

 SCHEDULE I 

 

									
	 Holders and Addresses
	    	 Principal Amount
	 	    	
PIK Interest Amount
	 
	 Energy Capital Partners III, LP

51 JFK Parkway

Suite 200

Short Hills, NJ 07078

Attn: General Counsel

Fax: (973) 671-6101
	    	 	$[***]	 	    	 	$[***]	 
	 Energy Capital Partners III-A, LP

51 JFK Parkway

Suite 200

Short Hills, NJ 07078

Attn: General Counsel

Fax: (973) 671-6101
	    	 	$[***]	 	    	 	$[***]	 
	 Energy Capital Partners III-B, LP

51 JFK Parkway

Suite 200

Short Hills, NJ 07078

Attn: General Counsel

Fax: (973) 671-6101
	    	 	$[***]	 	    	 	$[***]	 
	 Energy Capital Partners III-C, LP

51 JFK Parkway

Suite 200

Short Hills, NJ 07078

Attn: General Counsel

Fax: (973) 671-6101
	    	 	$[***]	 	    	 	$[***]	 
	 Energy Capital Partners III-D, LP

51 JFK Parkway

Suite 200

Short Hills, NJ 07078

Attn: General Counsel

Fax: (973) 671-6101
	    	 	$[***]	 	    	 	$[***]	 

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

									
	 Energy Capital Partners III (Sunnova Co-Invest), LP

51 JFK Parkway

Suite 200

Short Hills, NJ 07078

Attn: General Counsel

Fax: (973) 671-6101
	    	 	$[***]	 	    	 	$[***]	 
	 QSIP LP

c/o Strategic Capital Investment Partners, LP

390 Park Avenue

New York, NY 10022

Attention: David Taylor

With a copy to:

Soros Fund Management LLC

250 West 55th Street

New York, NY 10019

Attention: Thomas O’Grady
	    	 	$[***]	 	    	 	$[***]	 
	 MTP Energy Master Fund Ltd

1603 Orrington Avenue, 13th Floor

Evanston, IL 60201

Fax 847-905-5682
	    	 	$[***]	 	    	 	$[***]	 
	 Elk Mountain, Ltd.

100 Waugh Drive, #400

Houston, TX 77007
	    	 	$[***]	 	    	 	$[***]	 
	 Minion Trail, Ltd.

100 Waugh Drive, #400

Houston, TX 77007
	    	 	$[***]	 	    	 	$[***]	 
	 FS Energy and Power Fund

c/o FS Investments
 201
Rouse Boulevard
 Philadelphia, PA 19112
	    	 	$[***]	 	    	 	$[***]	 

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 

									
	 Portcullis Partners, LP

11 Greenway Plaza, Suite 2000 Houston, TX 77046
	    	 	$[***]	 	    	 	$[***]	 
	 The Board of Trustees of the Leland Stanford Junior University (DAPER II)

635 Knight Way

Stanford, CA, 94305-7297
	    	 	$[***]	 	    	 	$[***]	 
	 Rebecca Rabinow Management Trust

3711 San Felipe #12-I

Houston, TX 77027
	    	 	$[***]	 	    	 	$[***]	 
	 1811 Pesikoff Family Trust

1811 North Blvd.

Houston, TX 77098
	    	 	$[***]	 	    	 	$[***]	 
	 Richard A. Rabinow

3711 San Felipe #12-I

Houston, TX 77027
	    	 	$[***]	 	    	 	$[***]	 
	 Fayez Sarofim

P.O. Box 52830

Houston, TX 77052
	    	 	$[***]	 	    	 	$[***]	 
	 FSI No. 2 Corporation

P.O. Box 52830

Houston, TX 77052
	    	 	$[***]	 	    	 	$[***]	 

  
 [***] = Certain confidential
information contained in this document, marked by brackets, is filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended.

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