5 June 2025

Invinity Energy Systems plc

("Invinity" or the "Company")

Appointment of Non-Executive Director

Margaret Amos joins Invinity as Chair of the Audit Committee

Invinity Energy Systems plc (AIM: IES) (OTCQX: IESVF), a leading global manufacturer of utility-grade energy storage, is pleased to announce the appointment of Dr. Margaret Amos as a Non-Executive Director of the Company and Chair of the Audit Committee on the Board of Invinity with immediate effect.

An experienced Non-Executive Director having held Senior Independent Non-Executive, Audit, Remuneration and ESG Chair positions across a wide range of sectors, Dr. Amos brings over 27 years' financial, commercial and executive experience in fast-growing manufacturing and technology companies and over 10 years' non-executive board experience with global FTSE 250 companies including Hunting plc, Volution plc and Tyman plc.

Margaret spent the majority of her career at Rolls-Royce plc, serving as Senior Finance Business Partner, Aerospace and subsequently as Finance Director, Corporate, IT and Engineering before retiring in 2017. She holds a Doctorate in Professional Practice, a Masters in Global Supply Chain Management (with distinction) and is a fellow of both the Chartered Institute of Management Accountants and the Chartered Institute of Procurement and Supply.

As announced in the recently published 2024 Annual Report, Michael Farrow has given notice to the Board of Invinity of his intention to retire at the next Annual General Meeting.

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

"Margaret joins Invinity's Board at a pivotal moment as the Company scales up volume production of its ENDURIUM product to meet the growing long duration energy storage (LDES) demand in our core markets. Her extensive UK board-level experience will be instrumental in guiding Invinity through this next phase of growth. We are confident that she will be a valuable addition to the Board and a key contributor to the Company's success in the years ahead."

Dr. Margaret Amos said:

"I am delighted to be joining the Invinity Board at such a pivotal moment in its growth journey. With its cutting-edge vanadium flow battery technology, Invinity is uniquely positioned to deliver long duration energy storage at scale. I am excited by the prospect of joining such an innovative company at the forefront of the energy transition".

Further Information

Dr. Margaret Mary Amos, aged 55, holds or has held the following directorships or partnerships in the past five years:

*NMCN PLC was placed into compulsory liquidation on 16 September 2024 following entering administration on 6 October 2021. Proceedings are currently ongoing.

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) (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 more than 190 MWh of systems deployed, contracted for delivery or awarded for projects across more than 90 sites in 17 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 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.