Tarnița – Lăpuștești Hydroelectric Power Station

The Tarnița–Lăpuștești Hydropower Plant is a proposed hydroelectric pumped-storage project on the Someșul Cald River in Cluj County, Romania. If built it would be the largest hydro-electric load balancing system in Romania. During the night, when the demand is low and electricity is cheap because of powerplants which generate electricity continuously, such as the Cernavodă nuclear power plant, it will use electricity to pump water up the hill, while during the day, it will use the hydro energy to generate electricity.

Power station data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).