PG&E Operating Second Energy Storage System With NGK Batteries
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PG&E Corp., the owner of California’s largest utility, activated its second energy-storage project, using batteries from Japanese manufacturer NGK Insulators Ltd. to balance power on the electric grid.
The Yerba Buena Battery Energy Storage System Pilot Project cost $18.1 million and went into operation this month in San Jose, California, PG&E spokesman Paul Moreno said today by e-mail. The sodium-sulfur batteries have 4 megawatts of capacity and can store electricity for more than six hours. They’re charged when power demand is low and inject it back into the grid when demand grows.