21 March 2025

Invinity Energy Systems plc

("Invinity" or the "Company")

Electronic Shareholder Communications

Invinity Energy Systems plc (AIM: IES) (AQSE: IES) (OTCQX: IESVF), a leading global manufacturer of utility-grade energy storage, has posted a letter to shareholders requesting their consent to receive future shareholder communications via electronic means. A copy of the letter can be viewed electronically via this link.

Electronic communications offer shareholders a number of advantages including easier and quicker access to information and important documentation in digital format via the Company's Investor Portal. Additionally, by communicating electronically with shareholders, the Company can continue to minimise its environmental impact as well significantly reduce annual print and distribution costs.

Shareholders are therefore asked to register their consent to receive electronic communications by following the instructions set out in the letter or follow this link to complete the process online. Please note that you will need your Shareholder Reference Number (SRN) in order to register.

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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 75 MWh of systems already deployed or contracted for delivery across 82 sites in 15 countries, Invinity is active in all major global energy storage markets and has operations in the UK, Canada, USA and China. Invinity Energy Systems plc is quoted 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 ir@invinity.com.

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