4.75 GWh: the USA is building the world’s largest sodium-ion energy storage facility

Peak Energy has signed an agreement with Jupiter Power to build the world’s largest sodium-ion battery storage system, with a total capacity of 4.75 GWh. The project will roll out from 2027 to 2030, with an initial 720 MWh deployment in 2027—set to be the largest sodium-ion installation to date. The deal may exceed $500 million, and includes an additional 4 GWh reserved for Jupiter Power through 2030.

Peak Energy’s sodium-ion technology offers passive cooling, cutting auxiliary power use by 97% and improving safety. The company also claims 30% less battery degradation over 20 years compared with lithium-ion systems, reducing the need for extra capacity and lowering operating and maintenance costs.

Researchers worldwide are also advancing new battery technologies: CIMAV (Mexico) built a zinc-air battery that keeps working after puncture, fire, or full water immersion; Texas A&M scientists created the first metallic gel, resilient to extreme temperatures; University of Limerick (Ireland) developed the first full dual-cation battery using both lithium and sodium ions; 24M Technologies (USA) introduced a battery design that can boost EV range by 50% without increasing battery size.