The 'FlexBase' project aims to stabilize the Swiss and European grids by storing renewable energy. A Swiss firm is constructing the world's most powerful redox-flow battery in Laufenburg, Aargau. The battery installation is housed in a 27-metre-deep pit, longer than two football.
An innovative battery energy storage system at RWE's Moerdijk power plant in the Netherlands has begun commercial operation. It is the first installation of its kind to support inertia in the Central European electricity grid.
Due to the high operating temperature required (usually between 300 and 350 °C), as well as the highly reactive nature of sodium and sodium polysulfides, these batteries are primarily suited for stationary energy storage applications, rather than for use in vehicles.
Let's cut through the noise - a 2MW battery storage system typically ranges between $800,000 to $1. But why the massive price gap? Well, it's sort of like buying a car - the base model gets you moving, but add-ons like thermal management or advanced inverters.
Funded by Japan International Cooperation Agency and built under the United Nations Development Program's Vanuatu Green Transformation Project, the new facilities power up the villages of Waterfall, Melsisi and Larimaat.
A new analysis from energy think tank Ember shows that utility-scale battery storage costs have fallen to $65 per megawatt-hour (MWh) as of October 2025 in markets outside China and the US. At that level, pairing solar with batteries to deliver power when it's needed is now.
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