Switzerland begins work on the world’s most powerful redox flow battery
A redox flow battery rising from a 27-meter pit in northern Switzerland will become the world’s most powerful, capable of running 210,000 homes for a full day once it comes online in 2029. Unlike the lithium-ion batteries in our phones, this one stores energy in two liquid electrolytes pumped through a membrane — a design that’s non-flammable, almost fully recyclable, and built to cycle indefinitely without wearing out. It can respond to grid swings in milliseconds, soaking up excess wind power and releasing it when nearby AI data centers need a steady surge. Projects like this hint at what a renewables-first grid actually looks like: not just cleaner generation, but storage patient and powerful enough to make wind and solar genuinely dependable.









