General InformationESS Tech is an Oregon-based energy storage company founded in 2011 with 51-200 employees that specializes in iron flow battery technology for long-duration grid storage.
Funding & FinancialsESS Tech has raised over $300 million in total funding through multiple rounds including Series C and D, backed by investors such as Breakthrough Energy Ventures and technology-focused funds.
Leadership & TeamCEO Eric Dresselhuys leads the company; the team includes deep expertise in electrochemistry, materials science, and grid-scale energy systems from prior roles at major energy and battery companies.
Recent ActivityESS Tech has been executing pilot and demonstration projects with utility partners and announced expansions of manufacturing capacity to commercialize its iron flow batteries at scale.