X0206 3 2019-07-24 0 0001772695 Sunnova Energy International Inc. NOVA 0001707921 ECP ControlCo, LLC 51 JOHN F. KENNEDY PARKWAY SUITE 200 SHORT HILLS NJ 07078 0 0 1 0 0001621292 ENERGY CAPITAL PARTNERS III, LLC 51 JOHN F. KENNEDY PARKWAY SUITE 200 SHORT HILLS NJ 07078 0 0 1 0 0001697506 Energy Capital Partners GP III, LP 51 JOHN F. KENNEDY PARKWAY SUITE 200 SHORT HILLS NJ 07078 0 0 1 0 0001594546 ENERGY CAPITAL PARTNERS III, LP 51 JOHN F. KENNEDY PARKWAY SUITE 200 SHORT HILLS NJ 07078 0 0 1 0 0001594547 ENERGY CAPITAL PARTNERS III-A, LP 51 JOHN F. KENNEDY PARKWAY SUITE 200 SHORT HILLS NJ 07078 0 0 1 0 0001594548 ENERGY CAPITAL PARTNERS III-B, LP 51 JOHN F. KENNEDY PARKWAY SUITE 200 SHORT HILLS NJ 07078 0 0 1 0 0001594549 ENERGY CAPITAL PARTNERS III-C, LP 51 JOHN F. KENNEDY PARKWAY SUITE 200 SHORT HILLS NJ 07078 0 0 1 0 0001594550 ENERGY CAPITAL PARTNERS III-D, LP 51 JOHN F. KENNEDY PARKWAY SUITE 200 SHORT HILLS NJ 07078 0 0 1 0 0001783494 Energy Capital Partners GP III Co-Investment (Sunnova), LLC 51 JOHN F. KENNEDY PARKWAY SUITE 200 SHORT HILLS NJ 07078 0 0 1 0 0001679310 Energy Capital Partners III (Sunnova Co-Invest), LP 51 JOHN F. KENNEDY PARKWAY SUITE 200 SHORT HILLS NJ 07078 0 0 1 0 Common Stock 100000 I See footnotes The shares of Common Stock reported herein are held by Sunnova Energy Corporation ("Parent"). 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 (collectively, the "ECP Funds") and Energy Capital Partners III (Sunnova Co-Invest), LP ("ECP Sunnova") collectively beneficially own a majority of the outstanding shares of Parent. 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 held by Parent, but each disclaims any such beneficial ownership except to the extent of their pecuniary interest therein. ECP ControlCo, LLC, By: /s/ Rahman D'Argenio, Managing Member 2019-07-24 Energy Capital Partners III, LLC, By: ECP ControlCo, LLC, its managing member, By: /s/ Rahman D'Argenio, Managing Member 2019-07-24 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 2019-07-24 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 2019-07-24 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 2019-07-24 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 2019-07-24 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 2019-07-24 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 2019-07-24 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 2019-07-24 Energy Capital Partners III (Sunnova Co-Invest), LP, By: Energy Capital Partners GP III Co-Investment (Sunnova), LLC, its general partner, By: Energy Capital Partners III, LLC, By: ECP ControlCo, LLC, By: /s/ Rahman D'Argenio, Managing Member 2019-07-24