A giant water battery in the Alps could revolutionize energy storage

More than a third of electricity around the globe is generated from low carbon sources. But how that energy is stored can be damaging to the environment.

Much of the world still uses giant batteries, which contain metals that can contaminate ecosystems. One ecologically-friendly solution might be hidden in an idyllic corner of the Swiss Alps, thousands of meters above sea level.

CGTN's Razor programme has visited a giant 'water battery' that's been built under two repurposed reservoirs, and promises to transform Europe's energy grid.

Developers of the 2.2 billion Swiss franc (approx. $2.30 billion) Nant de Drance plant in the canton of Valais, which came online last July, say it has capacity to store enough electricity to charge 400,000 car batteries simultaneously.

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[maximilianholland]

Thank you. Pumped hydro definitely has a bright future, and this is an impressive example.

[PhilipDI]

18:47 - did she say 8-year concession? If so, it’s 80-years, dear.

[tedzehnder]

Has there ever been an excess of power?If you got rid of Russian or other adversary`s gas, would there be an excess to fill a lake?

[urrywest]

I can think of a half a dozen quesntions about this already.