9 November 2026
Invinity Energy Systems plc
("Invinity" or the "Company")
Endurium Performance Upgrade
Significant increase in power and energy density supports further product cost reduction and improved project economics
Invinity Energy Systems plc (AIM: IES), a global leader in vanadium flow battery technology, is pleased to announce a significant performance enhancement to its Endurium vanadium flow battery ("VFB") platform, further improving its competitiveness and delivering further tangible progress against the Company's previously announced product cost reduction programme.
The latest Endurium module, now released for general sale, delivers a 50% increase in energy capacity, together with a 33% increase in peak power output, alongside a range of additional upgrades. These performance enhancements have been achieved through a range of improvements including increased electrolyte capacity, upgraded electrical and power distribution subsystems and improvements to fluid management and control system algorithms.
Together, these enhancements deliver significantly improved power and energy density, meaning fewer Endurium modules are required to deliver the same electrical performance. For customers, this reduces equipment and space requirements while supporting lower installation and lifecycle costs, further improving project economics.
This achievement has been delivered by Invinity’s product development and R&D teams as part of Invinity's ongoing programme to improve the cost, performance and manufacturability of Endurium. The Company believes it represents an important milestone in the continued execution of its product roadmap and provides further evidence of delivery against the cost reduction objectives recently reiterated to shareholders.
Learn more about Invinity’s products here.
Jonathan Marren, Chief Executive Officer at Invinity said:
“This latest performance upgrade to Endurium marks another milestone in the continued development of our product. It reflects the excellent work of our team, who continue to deliver meaningful incremental improvements in performance while maintaining the durability, flexibility and safety our customers rely on.
“Product development is a continual process, and we have further improvements on our roadmap that we are excited about delivering. Each is focused on creating greater value for our customers while continuing to reduce our costs, improve margins and strengthen Endurium’s competitiveness as we scale.”
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Enquiries:
Invinity Energy Systems plc | +44 (0)20 4551 0361 |
Jonathan Marren, Chief Executive Officer Joe Worthington, Senior Director, Corporate Affairs |
Notes to Editors
Invinity Energy Systems plc (AIM: IES) is a world-leading manufacturer of vanadium flow batteries for energy storage. Built in our factories in the UK and Canada, the Company's proven, commercialised, flexible energy storage technology has been deployed at scale and dispatched gigawatt-hours of electricity for customers across the world.
Invinity's safe, scalable and durable battery technology is a trusted and safer alternative to lithium-ion batteries. Endurium 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, unlocking the power of renewable generation by delivering energy storage without limits.
To find out more, visit invinity.com, sign up to our monthly Investor Newsletter here or contact Investor Relations on +44 (0)20 4551 0361 or ir@invinity.com.
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