28 June 2023

Invinity Energy Systems plc

("Invinity" or the "Company")

Notice of AGM and Warrant General Meetings

Further to this morning's announcement of Full Year Results for the year ended 31 December 2022, 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") will be held at the Company's London offices at New Broad Street House, 35 New Broad Street, London EC2M 1NH at 11.00 a.m. on Wednesday 19 July 2023. In addition to the formal business of the AGM, management will give a presentation and answer questions from shareholders, which can be submitted in advance by emailing [email protected].

Earlier that day (Wednesday 19 July 2023) and at the same location (New Broad Street House, 35 New Broad Street, London EC2M 1NH), the Company will also hold two further General Meetings for Warrantholders ("Warrant General Meetings"). Specifically; a meeting of the holders of Short-Term Warrants (the "Short-Term Warrant General Meeting"), which will be held at 9.30 a.m. and a meeting of the holders of Long-Term Warrants (the "Long-Term Warrant General Meeting") which will be held at 9.45am.

As set out in this morning's 2022 Full Year Results announcement, the following amendments to the Short-Term and Long-Term Warrants will be proposed at the Warrant General Meetings:

Short-Term Warrant Meeting:

-     To amend the Subscription Price of the Short-Term Warrant to 50p and amend the Subscription Period to 16 December 2023

Long-Term Warrant Meeting:

-     To amend the Subscription Price of the Long-Term Warrant to 100p (with the Subscription Period remaining unchanged at 16 December 2024)

Notices of the AGM and Warrant General Meetings containing further information, along with relevant forms of proxy will be posted to Shareholders and Warrantholders shortly and available for download via the Company's shareholder documents portal.

Voting

Shareholders, Short-Term Warrantholders and Long-Term Warrantholders are strongly encouraged to appoint the Chairman of the Meetings 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, Short-Term Warrantholders or Long-Term Warrantholders from attending and voting at the Meetings in person if they wish to do so.

Completed forms of proxy must be scanned and emailed to #[email protected] or submitted via post. Completed proxies must be received by the registrar no later than 11.00 a.m. on Monday 17 July 2023 in respect of the AGM, 9.30 a.m. on Monday 17 July 2023 in respect of the Short-Term Warrant General Meeting and 9.45 a.m. on Monday 17 July 2023 in respect of the Long-Term Warrant General Meeting.

For assistance in submitting forms of proxy please email [email protected].

Attending the Meetings

Due to capacity constraints, Shareholders, Short-Term Warrantholders and Long-Term Warrantholders wishing to attend the Meetings are requested to RSVP via [email protected] no later than 5 p.m. on Monday 17 July 2023.

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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 over 65 MWh of systems already deployed or contracted for delivery across over 70 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].