en.Wedoany.com Reported - Energy Dome and Salt River Project (SRP) will deploy a 19 MW, 10-hour energy storage capacity carbon dioxide battery system on the Arizona grid, located at the Coronado Generating Station site in St. Johns.

The facility will be owned and operated by Energy Dome under a 20-year tolling agreement, with SRP dispatching its output. The project is part of a broader collaboration between Google and SRP aimed at accelerating the deployment of non-lithium long-duration energy storage technologies to enhance reliability and cost-effectiveness. Google is providing partial funding for the project through a cost-sharing arrangement, and the project was selected under SRP's 2024 Long-Duration Energy Storage Pilot Project solicitation.

Energy Dome's CO2 battery works by compressing carbon dioxide for storage when electricity is available and expanding it through a turbine to generate power when needed. SRP stated that the project will allow it to test the technology under real-world conditions in Arizona, supporting its plan to expand and diversify its generation portfolio by 2035 to meet the growing demand in the Phoenix metropolitan area. The system is expected to store energy for up to 10 hours and is scheduled to be operational in 2029.

SRP and Energy Dome will collaborate with the Electric Power Research Institute (EPRI) to monitor performance data after the project becomes operational.

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