World’s largest 4.75 GWh sodium battery system set for US grid storage

US-based Peak Energy has secured a multi-year agreement with Jupiter Power to supply up to 4.75 GWh of sodium-ion battery energy storage systems (ESS) for deployment between 2027 and 2030, with an option to reserve an additional 4 GWh for 2028-2030. The initial delivery in 2027 will be approximately 720 MWh, marking the largest announced sodium-ion battery deployment to date. The total contract value may exceed $500 million, representing a significant milestone for the sodium-ion storage sector. Peak Energy’s proprietary sodium-ion (NFPP) technology features a fully passive design that eliminates the need for active cooling systems, reducing auxiliary power consumption by up to 97% and enhancing safety. This design also lowers operations and maintenance costs by removing components that require routine upkeep. The system offers nearly 30% better cell degradation performance over 20 years compared to many lithium-ion alternatives, potentially reducing or eliminating the need for future capacity augmentations. Jupiter