X0508 4 2023-07-29 0 0001772695 Sunnova Energy International Inc. NOVA 0001782991 Berger William J 20 EAST GREENWAY PLAZA, SUITE 475 HOUSTON TX 77046 1 1 0 0 See Remarks 1 Common Stock 2023-07-29 4 M 0 119047 0.00 A 412372 D Common Stock 2023-08-01 4 S 0 47150 17.8577 D 365222 D Common Stock 24100 I See Footnote Common Stock 7471 I See Footnote Restricted Stock Units 2023-07-29 4 M 0 119047 0.00 D Common Stock 119047 357145 D Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of common stock ("Common Stock") of Sunnova Energy International Inc. (the "Company"). The sale of such shares of Common Stock was authorized by the reporting person in order to meet tax withholding obligations in connection with the July 29, 2023 vesting of RSUs granted on July 29, 2019. The sale of the reporting person's shares of Common Stock constitutes a "sell-to-cover transaction" and is provided for in a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934, as amended, and the sale does not represent a discretionary trade by the reporting person. A portion of the proceeds of the sale have been paid to the Company to the extent of the profit over the reporting person's purchases of Common Stock on March 28, 2023 and March 31, 2023. The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $17.49 to $18.19, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote. Such shares of Common Stock are held in the IRA of the reporting person's spouse. Such shares of Common Stock are held in the reporting person's IRA. The RSUs will vest in seven equal annual installments beginning on July 29, 2020. Common Stock will be delivered to the reporting person no later than 15 days after the RSUs vest. Chairman of the Board, President, and Chief Executive Officer /s/ David Searle by Power of Attorney 2023-08-01