GWH.W

ESS Tech, Inc. designs, manufactures, and deploys long-duration energy storage systems using iron flow battery technology. Headquartered in Wilsonville, Oregon, the company provides sustainable energy storage solutions primarily for commercial and utility-scale applications. ESS's flagship product, the Energy Warehouse, utilizes an electrolyte made from earth-abundant iron, salt, and water, offering a non-toxic alternative to lithium-ion batteries with the ability to store energy for 4 to 12 hours. The company's iron flow battery technology enables unlimited cycling without capacity fade, positioning it as a solution for renewable energy integration and grid stabilization projects. ESS went public in October 2021 through a merger with a special purpose acquisition company. The company operates manufacturing facilities in Oregon and maintains partnerships with energy developers and utilities across North America. ESS focuses on projects requiring flexible, long-duration discharge capabilities, targeting markets where battery degradation and fire safety concerns make traditional lithium-ion solutions less practical. Recent initiatives include scaling production capacity and expanding its project pipeline to meet growing demand for energy storage systems supporting solar and wind installations. As of recent reports, the company continues to transition from early-stage deployments to commercial-scale operations while managing the challenges typical of emerging clean energy technology companies.