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.

8 September 2026
Barcelona, Spain
Battery & Energy Storage Tech Europe (BESTE) is Europe’s industrial scaling platform for stationary and industrial battery applications — not EVs. Taking place 8–9 September 2026 at Fira de Barcelona, BESTE brings together utilities, IPPs, energy-intensive industries, data centres, ports, rail, maritime, defence and aerospace OEMs — all deploying or integrating battery storage at scale. Over 100 companies already confirmed — including EDP Renewables, Acciona, Endesa, Naturgy, Neoen, Galp, Basquevolt and Veolia — alongside 40+ expert speakers and international institutional support from BEPA, BVES, LDES and Volta Foundation. Where Europe’s battery & ES ecosystem turns projects into reality.
15 September 2026
San Diego, USA
You can expect to meet and network with all the key industry players again in 2025 from major US asset owners, operators, RTOs and ISOs, optimizers, software and analytics providers, technical consultancies, O&M technology providers and more.
6 October 2026
Warsaw, Poland
The Energy Storage Summit Central Eastern Europe is set to return in September 2025 for its third edition, focusing on regional markets and the unique opportunities they present. This event will bring together key stakeholders from across the region to explore the latest trends in energy storage, with a focus on the increasing integration of energy storage into regional grids, evolving government policies, and the growing need for energy security.

Read Next

June 24, 2026
Market research firm Wood Mackenzie predicted that the US energy storage market will almost quadruple over the next six years.
June 23, 2026
Renewables developer rPlus Energies has announced start of commercial operations for the 400MW/1,600MWh Green River Energy Centre in Emery County, Utah, US.
Premium
June 23, 2026
ZincFive, a manufacturer of nickel-zinc battery systems for data centre and AI infrastructure applications, announced on 11 June that it will become publicly traded through a merger with special purpose acquisition company (SPAC) Spark I Acquisition Corporation.
June 23, 2026
LS Power-owned REV Renewables and US development and investment company LS Power have commissioned the Tumbleweed Energy Storage facility in Kern County, California, US.
June 23, 2026
Meridian’s Waiinu Energy Park has been referred for consideration under New Zealand’s Fast-track Approvals Act.