
Salt River Project is bringing online two new battery storage systems in the Valley that can store enough electricity to dispense to tens of thousands of homes during peak demand times. The two systems — the 250-megawatt Sierra Estrella Energy Storage facility in Avondale and the 90-megawatt Superstition Energy Storage facility in Gilbert — come as the result of a partnership between SRP and Plus Power LLC. Both are charged from the existing power grid, and together, they have enough storage to power 76,000 residential homes for four hours. Sierra Estrella is Arizona’s largest standalone battery facility, sitting on nine acres off South Avondale Boulevard north of West Broadway Road. Its stored energy will be enough to power more than 56,000 homes for four hours. Construction started on that project in the spring of 2023. In the East Valley, the Superstition facility is expected to come online next week with capacity that will be able to supply energy to more than 20,000 homes for four hours. It’s located north of the Sunrise Business District, which is at the corner of West Elliot and North McQueen roads.The two new battery storage locations will bring SRP’s total amount of battery and pumped hydro storage to 1,300 megawatts. expandSuperstition Energy Storage Facility in Gilbert.SRPSRP and Houston-based Plus Power announced their collaboration in the fall of 2022, announcing that both facilities will be owned and operated by a Plus Power subsidiary.“We are proud to partner with SRP to bring the Sierra Estrella and Superstition battery storage proje …
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