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ESS Tech, Inc. is a long-duration energy storage company specializing in iron flow battery technology. The Company designs and produces long-duration batteries using earth-abundant materials. Its batteries provide flexibility to grid operators and energy assurance for commercial and industrial customers. Its technology addresses energy delivery, duration, and cycle-life in a single battery platform that compares favorably to lithium-ion batteries. Using its iron flow battery technology, the Company is developing two products, such as Energy Warehouse and Energy Center. The Energy Warehouse that offers energy storage ranging from six to twelve-hour duration. Energy Warehouses are deployed in shipping container units, allowing a turnkey system that can be installed easily at a customer’s site. Energy Center solutions are designed specifically for utilities, independent power producers (IPPs), and large commercial and industrial consumers. Its batteries are non-flammable and non-toxic.