Peak Energy Bringing Sodium-Ion Battery Storage To Wisconsin - CleanTechnica

Peak Energy, founded in 2023 by former Tesla, Enovix, and Apple entrepreneurs, is pioneering low-cost, large-scale sodium-ion battery storage technology aimed at dramatically reducing energy storage costs and establishing U.S. leadership in battery innovation. Sodium-ion batteries offer several advantages over traditional lithium-ion types, including better performance in cold temperatures, longer lifespan, lower flammability, and reduced cooling requirements. These features simplify battery pack design and cut costs, potentially halving the total price of battery systems and accelerating the adoption of battery-powered vehicles and grid storage. On March 12, 2026, Peak Energy announced a partnership with RWE Americas to pilot its passively cooled sodium-ion grid storage system in Eastern Wisconsin. This project positions RWE as a first mover in deploying next-generation, capital-efficient energy storage solutions. Peak’s proprietary GS-1.1 system leverages highly stable sodium-ion cells to eliminate costly maintenance and cooling infrastructure, reduce capacity overbuild, and maintain performance across a wide