Greater than 100,000 residence batteries throughout California stepped up as a digital energy plant final week in a scheduled check occasion, and the outcomes have been spectacular, in keeping with new evaluation from The Brattle Group.
Sunrun was the most important aggregator, Tesla was the most important OEM, and many of the batteries have been enrolled
in California’s Demand-Facet Grid Assist (DSGS) program.
Sunrun’s distributed battery fleet delivered greater than two-thirds of the power throughout a scheduled two-hour grid help check on July 29. In complete, the occasion pumped a median of 535 megawatts (MW) onto the grid – sufficient to energy over half of San Francisco.
The occasion, run between 7 and 9 pm, was coordinated by the California Power Fee, CAISO (California Impartial System Operator), and utilities to organize for stress on the grid throughout August and September warmth waves. And it labored.
Sunrun alone averaged over 360 MW throughout the two-hour window. The batteries kicked in proper when electrical energy demand sometimes spikes within the night, appearing identical to a conventional energy plant, however from individuals’s properties.
Brattle’s evaluation discovered that the battery output made a seen dent in statewide grid load, when the ability is required most. “Efficiency was constant throughout the occasion, with out main fluctuations or any attrition,” mentioned Ryan Hledik, a principal at The Brattle Group. He known as it “reliable, planning-grade efficiency at scale.”
Residential batteries, Hledik defined, don’t simply assist shave off demand throughout crucial hours; they will cut back the necessity for brand spanking new energy crops fully. “They’ll serve CAISO’s web peak, cut back the necessity to put money into new era capability, and relieve pressure on the system related to the night load ramp,” he mentioned.
This isn’t a one-off. Sunrun’s fleet already helped drop peak demand earlier this summer season, delivering 325 MW throughout the same occasion on June 24. The corporate compensates clients as much as $150 per battery per season for taking part.
Sunrun CEO Mary Powell summed it up: “Distributed residence batteries are a strong and versatile useful resource that reliably delivers energy to the grid at a second’s discover, benefiting all households by stopping blackouts, assuaging peak demand, and lowering excessive worth spikes.”
Learn extra: The US’s largest digital energy plant now runs on 75,000 residence batteries
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