Greater than 100,000 residence batteries throughout California stepped up as a digital energy plant final week in a scheduled take a look at occasion, and the outcomes have been spectacular, in keeping with new evaluation from The Brattle Group.
Sunrun was the biggest aggregator, Tesla was the biggest OEM, and many of the batteries have been enrolled
in California’s Demand-Aspect Grid Assist (DSGS) program.
Sunrun’s distributed battery fleet delivered greater than two-thirds of the power throughout a scheduled two-hour grid help take a look at on July 29. In complete, the occasion pumped a mean 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 arrange 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 usually spikes within the night, appearing identical to a standard energy plant, however from individuals’s houses.
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,” stated Ryan Hledik, a principal at The Brattle Group. He referred to as it “reliable, planning-grade efficiency at scale.”
Residential batteries, Hledik defined, don’t simply assist shave off demand throughout crucial hours; they will scale back the necessity for brand new energy crops completely. “They’ll serve CAISO’s internet peak, scale back the necessity to put money into new technology capability, and relieve pressure on the system related to the night load ramp,” he stated.
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 prospects 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 decreasing excessive value spikes.”
Learn extra: The US’s largest digital energy plant now runs on 75,000 residence batteries
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