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ESS Announces Closing of $40 Million Financing Transaction

FOR IMMEDIATE RELEASE Transaction Builds on Significant Momentum Following Announcement of 50MWh Energy Base Project in Arizona Wilsonville, Ore.– October 14, 2025 - ESS Tech, Inc. (“ESS” or the “Company”) (NYSE:GWH), a leading manufacturer of iron flow long-duration...

SRP and ESS Announce New 50 MWh Long Duration Energy Storage Pilot Project

Wilsonville, Ore.– October 9, 2025 – Salt River Project (SRP), a not-for-profit public power utility serving the greater Phoenix metropolitan area, and ESS (NYSE:GWH), a leading manufacturer of iron flow long-duration energy storage (LDES) systems, today announced an agreement to add Project New Horizon, a five megawatt (MW), 50 megawatt-hour (MWh) battery system, to the grid.

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