During a September 9 heat wave, Sunrun and Tesla coordinated a record 580-megawatt dispatch from home batteries to California's grid. The event pooled more than 140,000 residential batteries across the state, making it the largest residential distributed power plant event ever recorded.
Virtual power plants like this aggregate distributed home storage into a single resource that grid operators can call on during peak demand. The scale of this dispatch highlights how home batteries are moving from individual backup systems to a meaningful part of California's energy infrastructure.
The report comes from Electrek, and no other sources were provided for comparison. The figures and the record claim are based solely on that account.