Appointment of Non-Executive Director

29 June 2026

Invinity Energy Systems plc

("Invinity" or the "Company")

Appointment of Non-Executive Director

Volker Beckers CBE joins Board of Directors

Invinity Energy Systems plc (AIM: IES), a global leader in vanadium flow battery technology, is pleased to announce the appointment of Volker Beckers CBE as a Non-Executive Director with immediate effect.

Volker is an international leader within the energy industry with a distinguished career spanning over 30 years which includes a decade as Group CFO and then CEO of fully integrated energy company, RWE Npower plc (now RWE). During his tenure, the company undertook a significant transition from coal-based generation to gas and renewable energy sources while remaining one of the UK's largest power generators. Additionally, he has held numerous board chair positions including at Cornwall Insight, a leading UK energy consultancy, as well as at leading digital energy and flexibility focussed businesses Piclo and Reactive Technologies. Volker also held the role of Chair of the Audit & Risk Committee the UK Government's Nuclear Decommissioning Authority. He currently serves as Chair of several other clean and digital energy businesses in both the private and public sector.

Volker is actively involved in the world of academia and policy advisory, currently serving as President of the Board of the British Institute of Energy Economics, a membership organisation focusing on research insight and policy advisory. He has also held guest lecturer and adviser positions with various universities including King's College and Imperial College London. He is a Fellow of the Energy Institute (FEI) and in 2024, was awarded a CBE for his services to the energy / nuclear sector.

Volker joins the Board of Invinity following a rigorous selection and onboarding process led by the Nomination Committee. His appointment has also been endorsed by the National Wealth Fund, pursuant to the Relationship Agreement entered into with the Company in May 2024.

Neil O'Brien, Non-Executive Chair at Invinity said:

"Volker's significant expertise in energy and business will be invaluable to Invinity as the Company continues to progress and expand commercially, operationally and internationally. I am delighted that Volker is joining the Invinity board at a key inflection point for the Company and I am confident that his guidance will bring innumerable benefits as we execute on the global energy storage opportunity ahead of us."

Volker Beckers said:

"Throughout my career in the energy sector, I have seen first-hand the importance reliable, scalable energy storage solutions have in enabling a resilient and low-carbon system. Invinity's technology addresses that need directly, and I am excited to support the company as it moves into its next phase of commercial expansion."

Further Information

Volker Bernd Beckers CBE, aged 62, holds or has held the following directorships or partnerships in the past five years:

There are no other matters which are required to be disclosed in accordance with Rule 17 and paragraph (g) of Schedule Two of the AIM Rules for Companies.

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Notes to Editors

Invinity Energy Systems plc (AIM: IES) is a world-leading manufacturer of vanadium flow batteries (VFB). Built in our factories in the UK and Canada, the Company's proven energy storage technology has been deployed at scale and dispatched gigawatt-hours of electricity for customers across the world to date.

Invinity's safe, scalable and durable battery technology is a trusted and safer alternative to lithium-ion batteries and our VFBs are engineered for heavy-duty, high throughput applications. They don't wear out, cannot catch fire and are designed to be operated for 30 years or more. Our products address the challenges of our global energy system by delivering energy storage without limits, unlocking low-cost, low-carbon power on-demand.

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].