A New Battery Bet: Peak Energy and Jupiter Power Join Forces

A major supply deal between Peak Energy and Jupiter Power signals rising interest in sodium-ion batteries, though US adoption remains in its early phase

14 Nov 2025

Sodium-ion batteries took a notable step toward commercial relevance in the United States in November 2025. A new agreement between Peak Energy and Jupiter Power could bring the emerging technology closer to large scale deployment on the power grid.

The companies announced a multi year deal that may supply up to 4.75 gigawatt hours of sodium-ion battery systems for utility scale projects between 2027 and 2030. For industry observers, the announcement stands as one of the clearest commercial endorsements yet for the alternative battery chemistry.

Lithium-ion batteries still dominate the energy storage market by a wide margin. Yet the partnership reflects a broader effort within the industry to diversify battery technologies, strengthen domestic manufacturing, and reduce exposure to volatile global supply chains.

Peak Energy, a US based developer, is positioning sodium-ion as a practical option for stationary storage. Because the chemistry relies on more abundant raw materials, supporters argue it could help ease concerns around lithium supply constraints and price swings.

Jupiter Power, a major developer of grid scale storage projects, appears willing to test that promise. The first phase of the agreement includes 720 megawatt hours scheduled for delivery in 2027, with additional installations expected in the following years. Altogether, the contract is valued at more than $500 million, making it one of the largest sodium-ion supply commitments announced in the United States.

Even so, the technology still faces a proving period. Sodium-ion batteries generally have lower energy density than lithium-ion systems, though that limitation matters less for stationary grid installations than for electric vehicles.

Utilities and investors will likely look for real world performance data before embracing the chemistry on a broader scale. If the early projects deliver reliable results at competitive costs, sodium-ion batteries could become a meaningful addition to the rapidly expanding US storage market.