Tesla (TSLA) and Sunrun (RUN) said Monday their home-battery fleets dispatched more than 580 megawatts of power to California's grid during a three-hour period on Sept. 9, amid a heat wave.
More than 140,000 home batteries, including 110,000 Tesla Powerwalls and over 30,000 batteries from other manufacturers, dispatched power during the extreme heat, the companies said in a statement.
Tesla Powerwalls supplied 517 megawatts of the output, while other batteries supplied 63 megawatts.
A second three-hour dispatch on the next day delivered over 140 megawatts from the combined fleets, the companies said.
Tesla shares were 1.4% higher in Monday premarket activity, and Sunrun shares rose 3.8%.
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