Pumped storage hydropower facilities use water and gravity to create and store renewable energy. Learn more about this energy storage technology and how it can help support the 100% clean energy grid the country—and the world—needs. . PSH works by pumping and releasing water between two reservoirs at different elevations. During times of excess power and low energy prices, water is pumped to an upper reservoir for storage. When power or grid services are needed, water is released from the upper reservoir and flows down through a. . Pumped hydroelectric storage (PHS) is the most widely used electrical energy storage technology in the world today. It can offer a wide range of services to the modern-day power grid, especially assisting the large-scale integration of variable energy resources. PSH complements wind and solar by storing the excess electricity they create and providing the backup for when the wind isn't blowing, and the sun isn't shining. PSH. . This large-scale energy storage method plays a crucial role in stabilizing power grids and supporting the widespread adoption of intermittent renewable sources like wind and solar. It is often mistakenly considered a tapped resource, but according to the U.
