Invinity Selected to Design GWh-Scale VFB System

Strategic partnership with FlexBase to deploy world’s largest flow battery at the Technology Centre Laufenburg, Switzerland.

Thursday 21 May 2026

Invinity Energy Systems is delighted to note FlexBase Group’s announcement that, following an in-depth competitive selection process that reviewed proposals from flow battery manufacturers from across the world, it has selected Invinity to design a GWh-scale vanadium flow battery (“VFB”) for deployment at the Technology Centre Laufenburg.

Above: Representatives from FlexBase and Invinity at the project site in Laufenburg, Switzerland. From left to right: Pascal Wyss (CIO, FlexBase), Marcel Aumer (Group CEO & Founder, FlexBase), Jonathan Marren (CEO, Invinity), Jean-Louis Cols (VP, Global Partner Development, Invinity), Ben Williams (Project Manager, Invinity)

“Invinity has proven to be the strongest partner by presenting the most compelling overall package with the lowest life-cycle costs (LCOS). Invinity’s vanadium flow technology is perfectly suited for our project due to its safety – particularly its non-flammability – its cycle stability, and its flexibility in application.”

– Marcel Aumer, Group CEO, Chairman of the Board and Founder of FlexBase Group

Situated in the Swiss municipality of Laufenburg, which is located on the Switzerland-Germany border, the project will feature an AI datacentre and technology campus, integrated with a VFB of up to 1.5 GWh capacity – believed to be the world’s largest to date. Invinity’s battery solution, which FlexBase will look to expand to 2.1 GWh in subsequent phases, will be used to support the integration of renewable energy onto the site and provide stabilisation to the grid.

Above: Construction progress at the Laufenburg site (left) and team members from Invinity and FlexBase conducting a site inspection (right)

“In Invinity, we have found a partner that not only possesses market-ready and internationally proven technology but has also impressed us with innovative, modular solutions perfectly tailored to FlexBase. We look forward to working with the Invinity team to advance the vision of a sustainable energy future.”

– Pascal Wyss, Chief Innovation Officer, FlexBase

The project broke ground in May 2025 and is currently under construction. Invinity will now proceed with the engineering phase of the project, which is expected to take place during 2026 and into 2027 and will generate engineering revenue for the Company, subject to the achievement of various development milestones. Following the successful conclusion of the engineering design phase, a purchase order for the battery system is anticipated to be received, allowing Invinity to initiate phased manufacturing of datacentre-optimized VFB modules for integration into the project.

“Having just delivered the biggest vanadium flow battery in the UK, Invinity now enters the engineering phase of what will be the world’s largest vanadium flow battery to date. Our longstanding focus on continually building our expertise in flow battery technology has been recognized with the award of this phase of the contract and I am extremely proud of the efforts of the Invinity team in getting us to this position.”

– Jonathan Marren, Chief Executive Officer, Invinity Energy Systems