DOE energy storage grants look to the day when renewables rule the grid

Utility Dive: As renewable penetration grows, the need for energy storage grows as well. However, existing storage technologies may not be able to meet that need.

A Department of Energy (DOE) grant program aims to address that problem by trading efficiency for low cost.

Existing storage technologies fall short in terms of duration. Lithium-ion batteries, which have captured about 90% of the energy storage market, can economically run for about four hours.

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