2 October 2023

Invinity Energy Systems plc

("Invinity" or the "Company")

Total Voting Rights

Invinity Energy Systems plc (AIM: IES) (AQSE: IES) (OTCQX: IESVF), a leading global manufacturer of utility-grade energy storage, announces that it has issued 6,500 Ordinary Shares of €0.01 each (the "New Ordinary Shares") pursuant to the exercise of options under the Company's Employee Share Option Plan. All of the Ordinary Shares were issued under the Company's existing blocklisting entitlement.

Following the issue of the New Ordinary Shares the issued ordinary share capital of the Company comprises 191,038,673 ordinary shares of €0.01 each with one vote per share. Therefore, this figure can be used by shareholders as the denominator for the calculations by which to determine if they are required to notify their interest in, or a change to their interest in, the Company under the FCA's Disclosure and Transparency Rules.

The New Ordinary Shares are already admitted to trading on AIM under the Company's existing blocklisting entitlement. An application has been made for the New Ordinary Shares to be admitted to trading on the Aquis Stock Exchange and dealings are expected to commence on 6 October 2023.

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Notes to Editors

Invinity Energy Systems plc (AIM: IES) (AQSE: IES) (OTCQX: IESVF) manufactures vanadium flow batteries for large-scale, high-throughput energy storage requirements of business, industry and electrical networks.

Invinity's factory-built flow batteries run continually with no degradation for over 25 years, making them suitable for the most demanding applications in renewable energy production. Energy storage systems based on Invinity's batteries are safe, reliable, and economical, and range in size from less than 250 kilowatt-hours to tens of megawatt-hours.

Invinity was created in April 2020 through the merger of two flow battery industry leaders: redT energy plc and Avalon Battery Corporation. With over 70 MWh of systems already deployed or contracted for delivery across over 79 sites in 15 countries, Invinity is active in all major global energy storage markets and has operations in the UK, Canada, USA, China and Australia. Invinity Energy Systems plc is listed in the UK on AIM and AQSE and trades in the USA on OTCQX.

To find out more, visit invinity.com, sign up to our monthly Investor Newsletter here or contact Investor Relations on via +44 (0)20 4551 0361 or [email protected]