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THIS ANNOUNCEMENT AMOUNTS TO A FINANCIAL PROMOTION FOR THE PURPOSES OF SECTION 21 OF THE FINANCIAL SERVICES AND MARKETS ACT 2000 (“FSMA”) AND HAS BEEN APPROVED BY MAREX FINANCIALWHICH IS AUTHORISED AND REGULATED BY THE FINANCIAL CONDUCT AUTHORITY (FCA REGISTRATION NUMBER 442767).

Invinity Energy Systems plc (AIM: IES), a global leader in vanadium flow battery (“VFB”) technology, is pleased to announce a retail offer via the Winterflood Retail Access Platform (“WRAP”) to raise up to £5,000,000 (the “Retail Offer”) through the issue of new ordinary shares of £0.01 each in the capital of the Company (“Ordinary Shares”). Under the Retail Offer up to 50,000,000 new Ordinary Shares (the “Retail Offer Shares”) will be made available at a price of 10 pence per share (the “Issue Price”).

The Retail Offer is open to new and existing shareholders of Invinity Energy Systems plc. If the Retail Offer is oversubscribed, the Company intends to prioritise allocations for existing shareholders.

In addition to the Retail Offer, the Company is also proposing a placing of new Ordinary Shares (the “Placing”) and a subscription of new Ordinary Shares (the “Subscription”) to raise a minimum of £20,000,000 (before expenses), at the Issue Price. A separate announcement has been made regarding the Placing and its terms and sets out the reasons for the Placing and use of proceeds. The proceeds of the Retail Offer will be utilised in the same way as the proceeds of the Placing.

For the avoidance of doubt, the Retail Offer is not part of the Placing. Completion of the Retail Offer is conditional, inter alia, upon the completion of the Placing but completion of the Placing is not conditional on the completion of the Retail Offer.

The issue of the Retail Offer Shares is conditional upon, inter alia, the passing of certain resolutions to be put to shareholders of Invinity Energy Systems plc at a General Meeting, which is expected to be on 11 November 2026. The Retail Offer is also conditional on the Retail Offer Shares being admitted to trading on AIM (“Admission”). Admission is expected to occur at 8.00 a.m. on or around 12 November 2026.

Latest time and date for commitments under the Retail Offer

(Please note that intermediaries’ closing times may differ)

Admission and commencement of dealings in Retail Offer Shares issued on the London Stock Exchange