Posting of Circular and Arrangements for EGM

4 December 2020

Invinity Energy Systems plc

("Invinity" or the "Company")

Posting of Circular and Arrangements for EGM

Further to the announcement on 3 December 2020 announcing the completion of a Placing to raise £20.5 million and a proposed Open Offer to raise up to approximately £2 million, Invinity Energy Systems plc (AIM:IES), confirms that the Circular seeking approval for the issue of the Open Offer Shares and containing the notice convening an Extraordinary General Meeting (EGM) on 22 December at 2pm (UK Time) was posted to shareholders yesterday 3 December 2020.

Invinity has taken the decision to restrict physical attendance to its EGM in the interests of ensuring the health and safety of its shareholders, staff and directors. Consequently, as shareholders will be unable to vote in person at the meeting, they are strongly  encouraged to use their proxy vote and reminded that completed proxy forms may be scanned and submitted via email to #[email protected]. The deadline for submission of proxy votes is 2pm on 18 December 2020.

Invinity has made arrangements for shareholders to join the EGM electronically. Virtual attendees will be able to observe the formal business of the meeting. There will also be a short Q&A session.

Shareholders wishing to join the EGM virtually are kindly requested to register via the registration portal by 9am (UK time) on 22 December 2020.

Please contact Joe Worthington via [email protected] if you require any assistance with the proxy voting or virtual registration process.

All defined and capitalised terms have the same meaning as the Company's announcement on at 7:00 on 3 December 2020.

Enquiries:

Notes to Editors

Invinity Energy Systems plc (AIM:IES) manufactures vanadium flow batteries for the large-scale energy storage requirements of businesses, industry and electricity networks.

Developed specifically for high-utilisation applications, Invinity's highly scalable, factory-built flow battery products make low-carbon renewable generation reliable and can run continually with no degradation, charging and discharging for over 25 years. 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 10MWh of systems deployed to date across 40 sites in 14 countries, Invinity is active in all major global energy storage markets and has operations in the UK, Canada, USA, China and South Africa. Invinity Energy Systems plc is listed on the London Stock Exchange.

To find out more, visit invinity.com or call Investor Relations on +44 (0) 207 121 6111.