AltaGas wins 10-year SCE deal for 20MW battery system in California

LinkedIn
Twitter
Reddit
Facebook
Email

AltaGas will build a new battery storage system at its Pomona site (pictured) in southern California. Credit: AltaGas
Canadian energy company AltaGas has won a 10-year deal with Southern California Edison (SCE) for 20MW/80MWh of energy storage on the site of its natural gas plant in Pomona, in southern California.

AltaGas has appointed Greensmith Energy as the software provider and system integrator for the new system, which is expected to cost US$40-US$45 million, and will be among the largest battery storage projects in North America when it goes live in December.

AltaGas will provide SCE with 20MW of resource capacity for a continuous four-hour period, the equivalent of 80MWh of discharging capacity. AltaGas will receive fixed monthly resource adequacy payments, and retain the rights to earn additional revenue from the energy produced by the lithium-ion batteries.

David Harris, president and chief executive at AltaGas, said: “Adding battery storage to our California power portfolio proves the versatility of our asset base and greatly enhances the value of what we can offer the California and Desert Southwest markets through integrated energy centres providing clean reliable electricity.”

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

John Jung, president and chief executive at Greensmith, said his company focuses on advanced, mission-critical energy storage technologies for both grid-scale and behind-the-meter applications.

“Over the past eight years, the successful execution of this strategy along with an unparalleled track-record of safe, reliable and timely project completion, has helped us gain the confidence of innovative leaders,” he said.

AltaGas owns six natural gas-fired power plants in California. The SCE deal is its first for energy storage.

Read Next

October 14, 2026
The Illinois Power Agency (IPA) is seeking stakeholder feedback on its summer procurement of 600MW of energy storage projects in the US state, after falling short by 438MW.
October 13, 2026
US tax equity syndicator Foss & Company has closed a US$58 million partnership flip transaction to finance an energy storage project in Hidalgo County, Texas, developed by GridStor.
October 13, 2026
Independent power producer (IPP) Clearway Energy has added 210MW of energy storage capacity to its Honeycomb Energy Centre fleet in Southern Utah, US.
October 12, 2026
Distributed energy resource (DER) platform Voltus has raised US$225 million in an oversubscribed Series D financing round and is looking to expand in the US and Canada.
Premium
October 8, 2026
Energy-Storage.news Premium speaks with Freeman Hall, CEO of second-life BESS firm B2U Storage Solutions.