Sunrun Inc. announced that its CalReady power plant in California has more than quadrupled in size, now incorporating over 56,000 customer solar-plus-battery systems, totaling approximately 75,000 batteries. This expansion significantly enhances its capacity to provide critical energy to California's grid during periods of high energy prices, heat waves, and other grid emergency events.
CalReady, the largest home storage aggregation in the California Energy Commission's Demand Side Grid Support program, is expected to deliver an average of 250 megawatts per two-hour event, with the capability to reach an instantaneous peak of up to 375 megawatts. This output is sufficient to power approximately 280,000 homes, equivalent to all of Ventura County.
Sunrun customers enrolled in CalReady are compensated up to $150 per battery for sharing their stored solar energy, with total customer compensation expected to reach nearly $10 million this year, up from over $1.5 million last year. This massive growth underscores Sunrun's storage-first strategy, with California's storage attachment rate reaching nearly 90% at the end of 2024.
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