Peak Energy

Peak Energy is the most commercially advanced sodium-ion company in the US, operating the nation's first large-scale sodium-ion system. Its NFPP polyanion cathode eliminates thermal runaway, enabling a passive thermal system that removes 85 percent of failure causes. The GS-1.1 product delivers 3.1 MWh with 95 percent DC round-trip efficiency across a -40 to 55°C range. In November 2025, Peak signed a $500 million contract with Jupiter Power for up to 4.75 GWh — the largest US sodium-ion deal — outperforming #7 Tiamat Energy's 5 GWh factory target in scale and maturity. A March 2026 deployment with RWE entered the MISO grid. Peak targets 5 GWh production by 2028 and 50 GWh by 2032, with a gigafactory starting operations in 2026.