A Swiss company has built what is being called a giant water battery deep under the Alps that provides an energy storage capacity equivalent to 400,000 electric car batteries. .
"When there is too much electricity in the grid, coming for example from solar or wind production, Nant de Drance pumps water from the lower reservoir into the upper reservoir. In. .
The power station is operated by the company Nant de Drance SA, which is owned by four partners: Alpiq (39%), Swiss Railways. .
Limiting the global temperature rise to 1.5 degrees Celsius (2.7 Fahrenheit) will require doubling global hydropower capacity by 2050,. [pdf]
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