“Newer technologies for energy storage—including batteries, flywheels, compressed air and ice—are under development, but the proven, old-school solution of storing water as a proxy for power is attracting renewed respect from utilities and environmentalists aiming to fight climate change. It helps solve a big problem as power companies invest in renewable energy, which doesn’t always produce electricity when it is most needed.
California, for example, set a record for solar-power production in early July. But peak demand for electricity comes in the early evening, long after solar production has peaked. Pumped storage gives producers a way to bank energy for future use.”
Read More: Wall Street Journal | July 22, 2016