10 July 2024

Invinity Energy Systems plc

("Invinity" or the "Company")

Notice of Annual General Meeting

Invinity Energy Systems plc (AIM: IES) (AQSE: IES) (OTCQX: IESVF), a leading global manufacturer of utility-grade energy storage, announces that the Company's Annual General Meeting ("AGM" or "the Meeting") will be held at the Company's London offices at New Broad Street House, 35 New Broad Street, London EC2M 1NH at 3.00 p.m. (UK Time) on Monday 29 July 2024. In addition to the formal business of the AGM, management will give a brief presentation, which will be posted on the Company's website after the event, and answer questions from shareholders, which can be submitted in advance by emailing ir@invinity.com.

Notice of the AGM containing further information, along with the relevant form of proxy, will be posted to Shareholders shortly and will be available for download via the Company's shareholder documents portal.

Voting

Shareholders are strongly encouraged to appoint the Chairman of the Meeting as their proxy so that their vote will be counted if ultimately they (or any other proxy they might otherwise appoint) are not able to attend. Note that submitting a proxy will not preclude Shareholders from attending and voting at the AGM in person if they wish to do so.

Completed forms of proxy must be scanned and emailed to #UKCSBRS.ExternalProxyQueries@computershare.co.uk or submitted via post. Completed proxies must be received by the registrar no later than 3.00 p.m. on Thursday 25 July 2024.

For assistance in submitting forms of proxy please email ir@invinity.com.

Attending the Meetings

Due to capacity constraints, Shareholders wishing to attend the AGM are requested to RSVP via invinity@tavistock.co.uk no later than 5 p.m. on Friday 26 July 2024.

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Enquiries:

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, China and Australia. 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.