ESS, Inc. (ESS)

ESS Inc. (ESS Tech, Inc.) is a publicly traded US energy storage company developing and manufacturing iron flow batteries for long-duration energy storage applications. The company's iron flow technology uses earth-abundant iron, salt, and water to store renewable electricity for periods exceeding 4 hours, targeting grid and behind-the-meter energy storage for utilities, commercial, and industrial customers. ESS is based in Wilsonville, Oregon. While listed under ground support equipment in this dataset, ESS's public-facing product line is focused on grid-scale and commercial energy storage rather than aviation GSE.