Invinity delivers 20.7 MWh vanadium flow battery to UK
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- Invinity Energy Systems delivered 20.7 MWh of vanadium flow batteries — 90 units total — to the Copwood VFB Energy Hub in East Sussex, paired with a 3 MW solar array to time-shift daytime generation into evening and overnight grid supply.
- Invinity says the battery system can store roughly enough electricity to cover the daily needs of around 3,000 homes, and touts the water-based electrolyte as fire-risk-free — a point the company is leaning into as planners and communities push back on large battery projects.
- The Copwood project was funded through the UK government's Longer Duration Energy Storage demonstration program, delivered by the Department for Energy Security and Net Zero, with additional investment from the UK National Wealth Fund, which is a shareholder in Invinity.
- UK energy regulator Ofgem is expected to announce decisions soon under its long-duration energy storage "Cap and Floor" support scheme, and Invinity says its vanadium flow technology has been selected for multiple bids under the program.
- Invinity assembles its batteries in Motherwell and Bathgate, Scotland, where it also runs R&D and product development, and says a broader rollout could support up to 1,000 jobs in British battery manufacturing.
- Invinity CEO Jonathan Marren framed the project as proof long-duration storage converts intermittent renewables into reliable power: "If we are serious about delivering a power system dominated by renewables, we must stop wasting the energy we work so hard to generate."
Why it matters: The 20.7 MWh Copwood delivery gives Invinity a flagship European-scale reference project just as Ofgem's long-duration storage Cap and Floor scheme is about to greenlight (or reject) competing bids, directly shaping which technologies get built at scale. With Invinity claiming up to 1,000 UK manufacturing jobs hinge on rollout, the Ofgem decisions will determine whether vanadium flow chemistry gets a real foothold against lithium-ion in Britain's grid storage pipeline.
