ESS Tech Inc has agreed to a collaboration framework with Salt River Project and Google on Project New Horizon, a long-duration energy storage pilot at SRP’s Copper Crossing Energy and Research Center in Florence, Arizona. The project will deploy a 5 MW/50 MWh iron flow Energy Base system, with Google funding a portion of payments through a cost-sharing arrangement and EPRI expected to provide independent oversight for operational testing. Manufacturing is expected to begin in 2026, with delivery targeted for December 2027.

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