This article is available at https://www.euronews.com/green/2022/06/30/enormous-water-battery-in-switzerland-will-help-prevent-power-shortages
A water battery capable of storing electricity equivalent to 400,000 electric car batteries will begin operating in Switzerland next week.
The pumped storage power plant was built into a subterranean cavern in the Swiss canton of Valais. With the ability to store and generate vast quantities of hydroelectric energy, the battery will play an important role in stabilising power supplies in Switzerland and Europe.
Revolutionary new Swiss ‘water battery’ will be one of Europe’s main renewable sources of energy