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ESS Tech Awarded $9.9 Million Contract from Concurrent Technologies Corporation and U.S. Air Force Research Laboratory

Project to Deploy up to 27 MWh American-Made Large Capacity Energy Storage (LCES) System at U.S. Clear Space Force Station in Alaska

ESS Tec, Inc, NYSE:GWH, a leading manufacturer of long-duration energy storage systems (LDES) for commercial and utility-scale applications, today announced the execution of a $9.9 million contract with Concurrent Technologies Corporation (“CTC”) and the United States Air Force Research Laboratory (“AFRL”) for a large capacity energy storage (LCES) system at the U.S. Clear Space Force Station in Alaska.

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ESS Tech Awarded $9.9 Million Contract from Concurrent Technologies Corporation and U.S. Air Force Research Laboratory

Project to Deploy up to 27 MWh American-Made Large Capacity Energy Storage (LCES) System at U.S. Clear Space Force Station in Alaska

ESS Tec, Inc, NYSE:GWH, a leading manufacturer of long-duration energy storage systems (LDES) for commercial and utility-scale applications, today announced the execution of a $9.9 million contract with Concurrent Technologies Corporation (“CTC”) and the United States Air Force Research Laboratory (“AFRL”) for a large capacity energy storage (LCES) system at the U.S. Clear Space Force Station in Alaska.

ESS Tech, Inc. Announces $15 Million Registered Direct Offering Priced at a Premium to Market

ESS Tech, Inc. (NYSE: GWH) (the “Company”), a leading manufacturer of long-duration energy storage systems (LDES) for commercial and utility-scale applications, today announced that it has entered into definitive agreements in a registered direct offering with institutional investors for the purchase and sale of approximately $15 million of shares of Common Stock and pre-funded warrants at a price of $1.75 per share of Common Stock, which price is a premium to the closing price on January 28, 2026.

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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