X0306 4 2020-10-02 0 0001772695 Sunnova Energy International Inc. NOVA 0001707921 ECP ControlCo, LLC 40 BEECHWOOD ROAD SUMMIT NJ 07901 0 0 1 0 0001621292 ENERGY CAPITAL PARTNERS III, LLC 40 BEECHWOOD ROAD SUMMIT NJ 07901 0 0 1 0 0001697506 Energy Capital Partners GP III, LP 40 BEECHWOOD ROAD SUMMIT NJ 07901 0 0 1 0 0001594546 ENERGY CAPITAL PARTNERS III, LP 40 BEECHWOOD ROAD SUMMIT NJ 07901 0 0 1 0 0001594547 ENERGY CAPITAL PARTNERS III-A, LP 40 BEECHWOOD ROAD SUMMIT NJ 07901 0 0 1 0 0001594548 ENERGY CAPITAL PARTNERS III-B, LP 40 BEECHWOOD ROAD SUMMIT NJ 07901 0 0 1 0 0001594549 ENERGY CAPITAL PARTNERS III-C, LP 40 BEECHWOOD ROAD SUMMIT NJ 07901 0 0 1 0 0001594550 ENERGY CAPITAL PARTNERS III-D, LP 40 BEECHWOOD ROAD SUMMIT NJ 07901 0 0 1 0 0001783494 Energy Capital Partners GP III Co-Investment (Sunnova), LLC 40 BEECHWOOD ROAD SUMMIT NJ 07901 0 0 1 0 0001679310 Energy Capital Partners III (Sunnova Co-Invest), LP 40 BEECHWOOD ROAD SUMMIT NJ 07901 0 0 1 0 Common Stock 2020-10-02 4 S 0 5000000 28.00 D 19911664 I See footnotes 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"). 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. 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. ECP ControlCo, LLC, By: /s/ Rahman D'Argenio, Managing Member 2020-10-06 Energy Capital Partners III, LLC, By: ECP ControlCo, LLC, its managing member, By: /s/ Rahman D'Argenio, Managing Member 2020-10-06 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 2020-10-06 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 2020-10-06 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 2020-10-06 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 2020-10-06 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 2020-10-06 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 2020-10-06 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 2020-10-06 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 2020-10-06