X0202 SCHEDULE 13D/A 0001954316 XXXXXXXX LIVE 1 Common Stock, $0.05 par value per share 04/14/2026 false 0000022701 72303P503 SUNation Energy, Inc.

171 Remington Blvd. Ronkonkoma NY 11779

Scott Maskin (631) 750-9454 171 Remington Blvd. Ronkonkoma NY 11779 0001954316 N Scott Maskin OO N X1 554736.00 0.00 554736.00 0.00 554736.00 N 16.6 IN (1) The number of shares beneficially owned reflects adjustments for the Issuer's 1-for-200 reverse stock split that was effected on April 9, 2025, 1-for-50 reverse stock split that was effected on October 17, 2024 and the 1-for-15 reverse stock split that was effected on June 12, 2024. On April 14, 2026 the Reporting Person exchanged debt pursuant to a debt conversion agreement for 554,712 shares of the Issuer's Common Stock. Common Stock, $0.05 par value per share SUNation Energy, Inc. 171 Remington Blvd. Ronkonkoma NY 11779 This Schedule 13D is being filed on behalf of Scott Maskin, an individual (the "Reporting Person"), with respect to shares of the Issuer's Common Stock, held by the Reporting Person directly. The address of the principal business office of the Reporting Person is 171 Remington Blvd., Ronkonkoma NY 11779. The Reporting Person's principal occupation is as the Issuer's Chief Executive Officer and Director at the address of the Issuer. During the last five years, the Reporting Person has not been convicted in a criminal proceeding (excluding traffic violations and similar misdemeanors). During the last five years, the Reporting Person has not been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws. The Reporting Person is a citizen of the United States. The information in Item 4 is incorporated herein by reference. On November 9, 2022, the Issuer acquired all of the issued and outstanding equity of SUNation Solar Systems, Inc. and five of its affiliated entities ("SUNation"), directly or indirectly from SUNation's owners, which included the Reporting Person. The Reporting Person received 513,300 shares of Issuer's Common Stock as part of the consideration for the sale of SUNation by the Reporting Person and others in the transaction. In connection with the SUNation acquisition, the Issuer appointed the Reporting Person as a member of its Board of Directors, as well as the Senior Vice President and General Manager, New York Division of the Issuer. The Issuer and the Reporting Person entered into an Employment Agreement, dated November 9, 2022 related to the Reporting Person's employment with the Issuer. On June 30, 2023, the Reporting Person acquired 10,775 shares through the Issuer's 2022 Employee Stock Purchase Plan. On February 10, 2023, the Reporting Person gifted 45,000 of the 513,300 shares to MBB Energy LLC, a limited liability company ("MBB"). On June 14, 2023, MBB gifted the 45,000 shares back to the Reporting Person. The number of shares beneficially owned below reflects adjustments for the Issuer's 1-for-200 reverse stock split that was effected on April 9, 2025, 1-for-50 reverse stock split that was effected on October 17, 2024 and the 1-for-15 reverse stock split that was effected on June 12, 2024. On April 14, 2026 the Reporting Person exchanged debt pursuant to a debt conversion agreement for 554,712 shares of the Issuer's Common Stock. The Reporting Person has the sole power vote or to direct the vote and the sole power to dispose or to direct the disposition of the 554,736 shares of common stock (the "Shares") of the Issuer. The percentage of Shares reported to be beneficially owned by the Reporting Person is based on information from the Issuer. Thus, the Reporting Person is deemed to be the beneficial owner of an aggregate 16.6% of the common stock of the Issuer. The Reporting Person has the sole power to vote or to direct the vote and the sole power to dispose or to direct the disposition of the 554,736 Shares. The percentage of Shares reported to be beneficially owned by the Reporting Person is based on information from the Issuer. Thus, the Reporting Person is deemed to be the beneficial owner of an aggregate 16.6% of the common stock of the Issuer. The Company and the Reporting Person have not engaged in any transaction in shares of the Issuer's Common Stock during the past 60 days other than as described in Item 4. The responses in Item 4 is incorporated by reference. Not applicable. Not applicable. The information in Item 4 is incorporated herein by reference. Other than the agreements described in Item 4, as of the date hereof, there are no contracts, arrangements, understandings or relationships (legal or otherwise) among the Reporting Person and between such persons and any person with respect to any securities of the Issuer. sec.gov/Archives/edgar/data/22701/000121390026043846/ea028643601ex10-3.htm Scott Maskin /s/ Scott Maskin 05/01/2026