Nant de Drance has launched water-based energy storage in the Swiss canton of Valais. Its construction took 14 years and cost 2 billion euros, because the p + capacity of this large facility is estimated at 20 million kWh, which, according to rough estimates, happened to capture the energy system of the entire registration.
Structurally, the battery consists of two large reservoirs called Emosson and Old Soen. They admit that the overgrowth between them reaches 700 m. This is the reason for the departure of the young man. The moving water rotates the shafts of the generators and they generate energy.
Six turbines are installed here, which generate 900 MW of electricity. It will take at least 20 hours to completely empty the upper reservoir, but they plan to start the water little by little to compensate for the lack of energy in the network. And when it is in excess, pumps pump water back up and the process repeats.
Source: Tech Cult
