Contact: Mark Shwartz
Caption: Solar and wind power pose a challenge for the U.S. electrical grid, which lacks the capacity to store surplus clean electricity and deliver it on demand. Researchers are developing grid-scale storage batteries, but the fossil fuel required to build these technologies could negate some of the environmental benefits of new solar and wind farms, say Stanford scientists.
Credit: Eugene Water & Electric Board/NREL
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Related news release: Stanford scientists calculate the carbon footprint of grid-scale battery technologies