Company: SUNE
Filing Date: 2025-08-18
Form Type: 424B5
Source: 0001213900-25-078001
Chunk: 28

Company: SUNation Energy, Inc.
Filing Date: 2025-08-18
Form: 424B5
Chunk 28
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 sections of this prospectus entitled “About
this Prospectus” and “Plan of Distribution” for more information. This prospectus may not be used to offer and sell
our securities unless accompanied by a prospectus supplement describing the method and terms of the offering of such securities.

Investing in our securities involves risks. See “Risk Factors” beginning on page 4 of this prospectus and any similar section contained in the applicable prospectus supplement concerning factors you should consider before investing in our securities.

Our common stock is listed on the Nasdaq Capital
Market under the symbol “SUNE.” On April 21, 2025, the last reported sale price of our common stock on the Nasdaq Capital
Market was $2.75 per share. All common stock shares and share-related prices included in this prospectus are on a split-adjusted basis
per our amended certificate of incorporation.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

<div align='center'>The date of this prospectus is April 22, 2025.

TABLE OF CONTENTS</div>

| ABOUT THIS PROSPECTUS                                     |     | ii |
| PROSPECTUS SUMMARY                                        |     |  1 |
| SELECTED FINANCIAL DATA                                   |     |  2 |
| RISK FACTORS                                              |     |  4 |
| WHERE YOU CAN FIND MORE INFORMATION                       |     |  8 |
| INCORPORATION OF CERTAIN INFORMATION BY REFERENCE         |     |  9 |
| CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS |     | 10 |
| USE OF PROCEEDS                                           |     | 13 |
| DESCRIPTION OF SECURITIES                                 |     | 14 |
| DESCRIPTION OF DEBT SECURITIES                            |     | 17 |
| DESCRIPTION OF WARRANTS                                   |     | 32 |
| DESCRIPTION OF STOCK PURCHASE CONTRACTS                   |     | 35 |
| DESCRIPTION OF RIGHTS                                     |     | 36 |
| DESCRIPTION OF UNITS                                      |     | 37 |
| PLAN OF DISTRIBUTION                                      |     | 38 |
| LEGAL MATTERS                                             |     | 41 |
| EXPERTS                                                   |     | 41 |

<div align='center'>i

ABOUT THIS PROSPECTUS</div>

This prospectus is part of a registration statement
that