noun
pumped-storage hydroelectricity; pumped-storage power generation
Technical term for a method of storing energy by pumping water to a higher reservoir and releasing it to generate electricity when needed.
揚水発電は、夜間の余剰電力を利用して水をくみ上げる。
Pumped-storage hydroelectricity uses surplus electricity at night to pump water up.
水力発電 is general hydroelectric power generation, while 揚水発電 specifically refers to the pumped-storage method that reuses water between two reservoirs.
Compound of 揚水 (pumping water) and 発電 (power generation).