California continues to lead the world in energy storage deployment. The California Energy Commission (CEC) has released an updated Energy Storage System Survey, showing installed battery storage capacity has soared from 500 MW in 2018 to over 15,700 MW as of Q1 2025. An additional 8,600 MW is expected by 2027, with a 2045 target of 52,000 MW statewide.
Since 2023, California has added capacity in all market segments: 789 MW residential, 73 MW commercial, and 5,058 MW of utility-scale energy storage.
These systems play a critical role in ensuring grid reliability, particularly during evening peak hours when solar generation wanes. Their interactive dashboard breaks down the latest data.
As the voice for California’s energy storage sector, CESA is proud to advocate for policies and market structures that
support this exponential growth. But we can’t do it alone.
If your company is already a CESA member, we encourage you to invite colleagues and peer companies in the storage sector to join the Alliance. A stronger coalition strengthens our ability to shape the future of clean, reliable energy in California.
Together, we can power California’s path to 100% clean energy.
