Energy Impact Partners

Developing low-cost, multi-day energy storage using rechargeable iron-air batteries capable of delivering electricity for 100 hours at less than 1/10th the cost of lithium-ion. The batteries work by reversibly rusting and de-rusting iron using water and air. Manufacturing at Form Factory 1 in Weirton, West Virginia (550,000 sq ft). Signed $1B deal with Google for 300MW/30GWh system powering its Minnesota data center. Planning IPO in 2027.

Develops solid-state transformer technology for the modern electrical grid, replacing century-old transformer designs with modular, software-integrated power electronics. The flagship product, Heron Link, enables renewable energy, battery storage, and AI data center developers to connect directly to medium-voltage grids.

Moxion Power manufactured mobile energy storage products that enabled last-mile electrification across industries including construction, transportation, events, entertainment, film production, and telecommunications. The company offered zero-emission portable battery generators designed to replace traditional diesel generators, providing clean, quiet, and dependable temporary power. Founded in 2020 after co-founders Paul Huelskamp and Alex Meek witnessed diesel generators polluting their Mill Valley neighborhood during the 2019 California wildfire season. Moxion's units delivered 75 kilowatts of power and over 600 kilowatt-hours of energy. The company filed for Chapter 7 bankruptcy in August 2024 after investor funding fell through.