Company: SUNE
Filing Date: 2025-08-18
Form Type: 424B5
Source: 0001213900-25-078001
Chunk: 0

Company: SUNation Energy, Inc.
Filing Date: 2025-08-18
Form: 424B5
Chunk 0
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Filed pursuant to Rule 424(b)(5)
Registration No. 333-286663

PROSPECTUS SUPPLEMENT
(To Prospectus dated April 29, 2025)

<div align='center'>$30,000,000 of Common Stock</div>

We have entered into a Sales Agreement (the “Sales
Agreement”), dated August 18, 2025, with Needham & Company, LLC (the “Sales Agent”), relating to the shares of
our Common Stock, par value $0.05 per share (the “Common Stock”), offered by this prospectus supplement. In accordance with
the terms of the Sales Agreement, we may offer and sell shares of our Common Stock having an aggregate offering price of up to $30,000,000
from time to time through or to the Sales Agent, as agent or principal.

Sales of Common Stock, if any, under this prospectus
supplement and the accompanying prospectus may be made in transactions that are deemed to be “at-the-market offerings” as
defined in Rule 415 under the Securities Act of 1933, as amended (the “Securities Act”). The Sales Agent is not required
to sell any specific number or dollar amount of shares, but will act as sales agent on a commercially reasonable efforts basis consistent
with its normal trading and sales practices. There is no arrangement for funds to be received in any escrow, trust or similar arrangement.

We will pay the Sales Agent a fixed commission,
in an amount up to 3.0% of the gross sales price per share of Common Stock issued by us and sold through them as our Sales Agent under
the Sales Agreement. In connection with the sale of Common Stock on our behalf, the Sales Agent will be deemed to be an “underwriter”
within the meaning of the Securities Act and the compensation to the Sales Agent will be deemed to be underwriting commissions or discounts.
We have also agreed to provide indemnification and contribution to the Sales Agent with respect to certain liabilities, including liabilities
under the Securities Act.

As of August 15, 2025, we had 996,593,319 authorized
but unissued shares of Common Stock available for issuance (after deducting the number of shares outstanding and reserved for issuance
of an aggregate of 67 shares of Common Stock issuable upon the exercise of any outstanding equity incentive plan, equity stock purchase
plans and SUNation inducement shares).

Our shares of Common Stock are traded on the
Nasdaq