On June 15, 2026, Energy Dome, a leading provider of innovative capacity solutions for utilities and AI infrastructure, and Salt River Project (SRP), a not-for-profit public power utility serving the greater Phoenix metropolitan area, announced an agreement to add a 19-megawatt, 10-hour carbon dioxide-based battery system to the grid. The project is part of Google and SRP’s innovative collaboration to accelerate deployment of non-lithium-ion long-duration energy storage technologies that support reliability, affordability, and sustainability. Wilson Sonsini Goodrich & Rosati advised Energy Dome on the transaction.

The project is planned to be co-located on the site of SRP’s Coronado Generating Station in St. Johns, Arizona, and it will be developed under a 20-year tolling agreement, with Energy Dome owning and operating the facility and SRP dispatching its output.

The Wilson Sonsini team that advised Energy Dome on the transaction included Scott Zimmermann, Nadia Senter, Karli Upfill-Brown, and Alex Fischler.

For more information, please see Energy Dome’s news release. Additional coverage can be found on Utility Dive.