en.Wedoany.com Reported - Flexbase is constructing the world's most powerful flow battery energy storage facility in an excavated underground cavern on the Swiss-German border. The cavern excavation is complete, with a total storage capacity of 2.1 gigawatt-hours and an output power of 1.2 gigawatts, expected to connect to the grid in 2029.

The facility will utilize vanadium flow battery technology developed by Invinity Energy Systems. Unlike the widely used lithium-ion batteries, flow batteries store energy in large electrolyte tanks, are non-flammable, and do not degrade after decades of high-frequency charge-discharge cycles, whereas lithium-ion batteries have limited lifespans and efficiency declines over time. Flow batteries can be flexibly scaled by building larger tanks.

With a capacity of 2.1 GWh, the battery can power up to 210,000 households for an entire day. The facility will also include an artificial intelligence data center with a water cooling system and a power capacity of 500 megawatts, along with offices and laboratories, all of which will draw energy from the battery.

Flexbase stated that the battery will store excess electricity from Europe's high-voltage transmission grid to help stabilize the power network. The facility is located next to the Laufenburg Star substation, built 60 years ago and one of Europe's most important hubs, which first connected the grids of Switzerland, France, and Germany. Situated at the core of Europe's power network, the facility can absorb surplus energy from solar power in Southern Europe or wind power in Northern Europe and release it back to the grid during peak demand. By acting as a continuous buffer for renewable energy, the battery will ensure that the affiliated AI facility operates sustainably using renewable energy without overloading the local grid.

Jonathan Marren, CEO of Invinity Energy Systems, stated that the company delivered the UK's largest vanadium flow battery facility in Uckfield, East Sussex, consisting of 90 individual batteries with a storage capacity of 20.7 MWh, and has now entered the engineering phase for the world's largest vanadium flow battery.

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