SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* ECP ControlCo, LLC (Last) (First) (Middle) 40 BEECHWOOD ROAD (Street) SUMMIT NJ 07901 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Sunnova Energy International Inc. [ NOVA ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 10/02/2020
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/02/2020		S		5,000,000	D	$28	19,911,664	I	See footnotes(1)(2)(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* ECP ControlCo, LLC (Last) (First) (Middle) 40 BEECHWOOD ROAD (Street) SUMMIT NJ 07901 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ENERGY CAPITAL PARTNERS III, LLC (Last) (First) (Middle) 40 BEECHWOOD ROAD (Street) SUMMIT NJ 07901 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Energy Capital Partners GP III, LP (Last) (First) (Middle) 40 BEECHWOOD ROAD (Street) SUMMIT NJ 07901 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ENERGY CAPITAL PARTNERS III, LP (Last) (First) (Middle) 40 BEECHWOOD ROAD (Street) SUMMIT NJ 07901 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ENERGY CAPITAL PARTNERS III-A, LP (Last) (First) (Middle) 40 BEECHWOOD ROAD (Street) SUMMIT NJ 07901 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ENERGY CAPITAL PARTNERS III-B, LP (Last) (First) (Middle) 40 BEECHWOOD ROAD (Street) SUMMIT NJ 07901 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ENERGY CAPITAL PARTNERS III-C, LP (Last) (First) (Middle) 40 BEECHWOOD ROAD (Street) SUMMIT NJ 07901 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* ENERGY CAPITAL PARTNERS III-D, LP (Last) (First) (Middle) 40 BEECHWOOD ROAD (Street) SUMMIT NJ 07901 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Energy Capital Partners GP III Co-Investment (Sunnova), LLC (Last) (First) (Middle) 40 BEECHWOOD ROAD (Street) SUMMIT NJ 07901 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Energy Capital Partners III (Sunnova Co-Invest), LP (Last) (First) (Middle) 40 BEECHWOOD ROAD (Street) SUMMIT NJ 07901 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. Consists of: 274,199 shares of Common Stock held by Energy Capital Partners III, LP, 9,230,501 shares of Common Stock held by Energy Capital Partners III-A, LP, 1,114,733 shares of Common Stock held by Energy Capital Partners III-B, LP, 3,816,033 shares of Common Stock held by Energy Capital Partners III-C, LP, 4,709,639 shares of Common Stock held by Energy Capital Partners III-D, LP (collectively, the "ECP Funds") and 766,559 shares of Common Stock held by Energy Capital Partners III (Sunnova Co-Invest), LP ("ECP Sunnova").

2. ECP Control Co, LLC ("ECP Control Co") is the managing member of Energy Capital Partners III, LLC ("ECP GP"), which is (i) the general partner of Energy Capital Partners GP III, LP ("ECP Fund GP") and (ii) the managing member of Energy Capital Partners GP III Co-Investment (Sunnova), LLC ("ECP Sunnova GP"). ECP Fund GP is the general partner of each of the ECP Funds and ECP Sunnova GP is the general partner of ECP Sunnova. Douglas Kimmelman, Andrew Singer, Peter Labbat, Tyler Reeder and Rahman D'Argenio are the managing members of ECP ControlCo and share the power to vote and dispose of the securities beneficially owned by ECP ControlCo. As such, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the Common Stock reported herein, but each disclaims any such beneficial ownership except to the extent of their pecuniary interest therein.

3. In connection with the transactions reported herein, the reporting persons have agreed with BofA Securities, Inc. (the "Broker") not to dispose of any shares of Common Stock for a period of 30 days without the Broker's consent.

Remarks:

	ECP ControlCo, LLC, By: /s/ Rahman D'Argenio, Managing Member	10/06/2020
	Energy Capital Partners III, LLC, By: ECP ControlCo, LLC, its managing member, By: /s/ Rahman D'Argenio, Managing Member	10/06/2020
	Energy Capital Partners GP III, LP, By: Energy Capital Partners III, LLC, its general partner, By: ECP ControlCo, LLC, its managing member, By: /s/ Rahman D'Argenio, Managing Member	10/06/2020
	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, Managing Member	10/06/2020
	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, Managing Member	10/06/2020
	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, Managing Member	10/06/2020
	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, Managing Member	10/06/2020
	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, Managing Member	10/06/2020
	Energy Capital Partners GP III Co-Investment (Sunnova), LLC, By: Energy Capital Partners III, LLC, its managing member, By: ECP ControlCo, LLC, its managing member, By: /s/ Rahman D'Argenio, Managing Member	10/06/2020
	Energy Capital Partners III (Sunnova Co-Invest), LP, By: Energy Capital Partners GP III Co-Investment (Sunnova), LLC, By: Energy Capital Partners III, LLC, By: ECP ControlCo, LLC, its managing member, By: /s/ Rahman D'Argenio, Managing Member	10/06/2020
	** Signature of Reporting Person	Date
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