Long-duration iron flow batteries for utility and commercial applications
ESS Inc. designs, builds, and deploys long-duration energy storage systems using a proprietary iron electrolyte flow battery technology. Their systems provide safe, sustainable, and low-cost long-duration storage for 3-12 hours.
Founded in 2011, ESS developed an iron-based flow battery chemistry that avoids vanadium's cost and supply chain challenges. The company went public via SPAC in 2021 and trades on the NYSE under the ticker GWH.