Sodium-Ion Storage Developer Peak Energy Secures 108 Million Dollars In Funding

Peak Energy has raised 108 million dollars in an oversubscribed Series B funding round led by GM Ventures. The capital injection includes participation from Maverick Silicon, Infinite Capital, Eclipse, Xora Innovation, and LG Technology Ventures. This latest financial milestone follows a 55 million dollar Series A round completed in 2024, though the company did not disclose its current valuation or the specific contribution from GM Ventures.

The company intends to use the funds to scale its domestic manufacturing operations and support the launch of its passively cooled sodium-ion systems for the data center market. Peak Energy currently holds over 1 billion dollars in customer orders, including a multi-year agreement with Jupiter Power for up to 4.75 GWh of storage capacity between 2027 and 2030. Additionally, the firm has a supply agreement with Energy Vault for 1.5 GWh of systems and is piloting technology with RWE in the Midcontinent Independent System Operator market.

Manufacturing efforts are centered on a 17,000-square-meter facility in Sacramento, which represents a 71 million dollar capital investment. The plant is designed for an annual output of 4 GWh, with production slated to commence in the first quarter of 2027. Currently, the company assembles containers at a facility in Burlingame, California, using cells sourced from China, while collaborating with GM to develop next-generation cells at the automaker's Michigan laboratories.

According to Peak Energy, its proprietary system eliminates the need for active cooling, which the company claims can reduce energy costs by up to 20 percent compared to conventional storage technologies while requiring no planned maintenance. These performance claims remain to be independently verified. The company previously demonstrated its technology with a 3.5 MWh installation at the Solar Technology Acceleration Center in Colorado, which began operations in September 2025.