ESS Inc.

About ESS Inc.

ESS Inc. designs and manufactures long-duration iron flow batteries for commercial, industrial, and utility-scale energy storage. The company’s non-toxic, recyclable electrolyte systems store 4–12 hours of energy, enabling renewable integration and grid resilience. Founded in 2011 and headquartered in Wilsonville, Oregon, ESS delivers modular Energy Warehouse and Energy Center solutions that avoid lithium, cobalt, and hazardous chemicals, offering 20-year operational life without capacity degradation. Projects span the Americas, Europe, and Australia, supporting microgrids, solar-plus-storage plants, and critical infrastructure. ESS is publicly traded on the NYSE under the symbol GWH.