SUSTAINABILITY
Water battery
A water battery capable of storing electricity equivalent to 400,000 electric car batteries has just begun operating in Switzerland. 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. A water battery or pumped storage power plant is a type of hydroelectric energy storage. The Swiss power plant, constructed by the company Nant de Drance, began operating on 1st July. The plant has six pump turbines and a total power output of 900 MW, enough to power as many as 900,000 homes. It took 14 years to complete because of considerable logistical and engineering challenges. To create the plant, 18 kilometres of tunnels had to be dug through the Alps. With a storage capacity of 20 million kWh of electricity, it is hoped the water battery will play a significant role in stabilising Switzerland and Europe’s energy grids. During periods of high demand, such as during heatwaves, the battery can reduce the likelihood of a grid overload.
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