Understanding Low-Cost, Long-Duration Energy Storage Technology: A Primer

Energy storage has become an everyday element of grid planning and energy network management – driven by technology advances, proven benefits, and steadily falling prices. As storage goes mainstream, it’s no longer unusual to see deployments in the tens of MWh. Although about 95 percent of operational storage in the U.S. is in the form of pumped hydro, which can store massive amounts of energy cheaply for days, virtually all of the remaining storage resources are lithium-ion batteries.

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