Steven Chu: long-term energy storage solution has been here all along

FORBES | The most efficient energy storage technology may be as close as the nearest hill, according to former Energy Secretary Steven Chu, and almost as old.


“It turns out the most efficient energy storage is you take that electricity and you pump water up a hill,” Chu said Tuesday at the Stanford University Global Energy Forum.


When electricity is needed, you let the water flow down, spinning generators along the way. Pumped hydro can meet demand for seasonal storage instead of the four hours typical of lithium-ion batteries.


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