Invinity Energy Systems (LSE:IES) has been appointed by Switzerland’s FlexBase Group to design a large-scale vanadium flow battery system for a new AI-focused datacentre and technology campus located in Laufenburg, on the border between Switzerland and Germany. The planned installation is expected to have a capacity of up to 1.5 GWh, with the potential to expand to 2.1 GWh, making it one of the largest flow battery projects ever proposed globally.
The battery system is intended to support renewable energy integration at the site while also providing grid balancing and stabilisation services. Construction on the wider FlexBase development began in 2025 and is already underway.
The project has now entered a multi-year engineering phase scheduled to run through 2026 and 2027. During this period, Invinity is expected to earn engineering-related revenues tied to milestone achievements, with a larger follow-on order for equipment anticipated after completion of the design stage.
The agreement further strengthens Invinity’s position in the long-duration energy storage market and builds on its experience delivering large-scale vanadium flow battery systems, including the UK’s largest installation of its kind. The company said the project highlights growing demand for safe, modular and long-life storage technologies capable of supporting energy-intensive digital infrastructure and renewable power networks.
Invinity’s broader outlook remains influenced by ongoing financial challenges, including substantial losses and negative cash flow generation. Technical indicators and valuation measures also remain weak, although recent strategic developments and project wins have provided more positive momentum. Management said successful execution of its commercial pipeline and improvement in financial performance will be key factors shaping the company’s longer-term prospects.
More about Invinity Energy Systems
Invinity Energy Systems is a London-listed energy storage technology company specialising in utility-scale vanadium flow batteries. With manufacturing operations in the UK and Canada, the company develops long-duration, non-flammable energy storage systems designed for grid-scale applications, renewable energy integration and infrastructure projects where operational safety, durability and lifecycle efficiency are critical.
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