Terrament, based in Los Angeles and New York, is developing patented long-duration energy storage that uses underutilized mine shafts to store electricity through gravity. Founded by a former underground mine engineer and a technical entrepreneur, the company’s design combines a mile of vertical height with shaft-wall-mounted rails and avoids chemical batteries or critical minerals. Its research-backed system is projected to exceed 80% round-trip efficiency, with two U.S. patents granted and further patents pending.
U.S. Patents
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Form EnergyFounded in 2017 by five energy-storage veterans, Form Energy develops and manufactures iron-air battery systems designed to store electricity for up to 100 hours and support a reliable electric grid. Its 550,000-square-foot Form Factory 1 occupies the former Weirton Steel site in West Virginia, linking the Ohio Valley’s manufacturing heritage to a new generation of grid technology. The company employs nearly 1,000 people across facilities in West Virginia, Massachusetts, and California.EIGHTY FOUR, PA
ABOUND Energy IncABOUND Energy develops and commercializes energy technologies, from zinc-air long-duration storage under its Zaeras™ platform to advanced air-cathode materials and on-demand hydrogen production. Based in Richmond, British Columbia, the company’s distinctive approach separates storage power from energy capacity, allowing longer-duration systems to scale by expanding their zinc-fuel storage. ABOUND’s portfolio includes more than 15 international patents, with five additional patents pending, and its Zaeras™ system is designed for safe, non-flammable operation using abundant zinc and air.BROOKLYN, NY
Ashlawn Energy, LLCFounded by Norma Byron in 2008, Ashlawn Energy develops and manufactures VanCharg™, a 32 kW vanadium redox flow battery system for stationary, long-duration energy storage. The woman-owned company is expanding U.S. manufacturing and assembly in a 10,000-square-foot facility at the historic Xerox Webster Campus in Webster, New York. VanCharg is built around non-flammable chemistry for buildings, communities, and critical infrastructure seeking longer-duration storage and improved energy resilience.BINGHAMTON, NY
Urban Electric PowerFounded through ARPA-E-supported research at the City University of New York Energy Institute, Urban Electric Power is a U.S. energy technology company known for advancing rechargeable zinc battery chemistry beyond the familiar disposable cell. Its systems are developed and manufactured in New York for commercial and public-sector energy storage, with the technology validated through more than 12 million hours of operation.PEARL RIVER, NY