X0306 4 2021-11-01 1 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 2021-11-01 4 S 0 6000000 41.28 D 10911664 I See footnote The securities reported herein are held of record by ECP Sunnova Holdings, LP ("ECP Sunnova Holdings"). ECP Control Co, LLC is the managing member of Energy Capital Partners III, LLC ("ECP GP"), which is the managing member of Energy Capital Partners GP III Co-Investment (Sunnova), LLC ("ECP Sunnova GP"). ECP Sunnova GP is the general partner of Energy Capital Partners III (Sunnova Co-Invest), LP ("ECP Sunnova"). ECP GP is the general partner of Energy Capital Partners GP III, LP, which is the general partner of each of (i) Energy Capital Partners III-A, LP, (ii) Energy Capital Partners III, LP, (iii) Energy Capital Partners III-B, LP, (iv) Energy Capital Parnters III-D, LP, and (v) Energy Capital Partners III-C, LP (together with ECP Sunnova, the "Funds"). The Funds are the managing members of ECP Sunnova Holdings GP, LLC, which is the general partner of ECP Sunnova Holdings. Due to the limitations of the electronic filing system, each of ECP Sunnova Holdings, LP and ECP Sunnova Holdings GP, LLC are filing a separate Form 4. ECP ControlCo, LLC, By: /s/ Rahman D'Argenio, Managing Member 2021-11-03 Energy Capital Partners III, LLC, By: ECP ControlCo, LLC, its managing member, By: /s/ Rahman D'Argenio, Managing Member 2021-11-03 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 2021-11-03 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 2021-11-03 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 2021-11-03 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 2021-11-03 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 2021-11-03 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 2021-11-03 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 2021-11-03 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 2021-11-03