# GM Develops Michigan Grid-Storage Batteries

General Motors is developing sodium-ion cells in its Michigan battery labs for stationary grid storage, not electric vehicles, while Peak Energy integrates the cells into storage systems. Peak says its passively cooled systems reduce costs by 20% compared with conventional systems and deliver more than 99% uptime. Peak has agreed to supply Jupiter Power with up to 4.75 GWh of systems for deployments planned from 2027 through 2030. The agreement is commercial rather than a government award, but it signals potential demand relevant to public-sector energy-storage buyers and suppliers.

- Peak’s planned 2027–2030 deliveries to Jupiter Power provide a concrete indicator of prospective demand for sodium-ion storage systems and associated components.
- Procurement teams evaluating stationary storage can compare the cited cost and uptime claims with project requirements and conventional systems; the claims are attributed to Peak Energy.
- Battery, integration, and grid-storage suppliers may find opportunities to support deployment at scale as Peak’s agreement moves toward delivery.

**Jurisdictions:** sled
**Industries:** Energy & Utilities
**Topics:** Physical Infrastructure
**Published:** November 14, 2026

### Vendors
- General Motors (Sodium-ion cell developer and exclusive manufacturer under the partnership)
- Peak Energy (Storage-system integrator and supplier to Jupiter Power)
- Jupiter Power (Buyer under an agreement for sodium-ion battery energy storage systems)

### Sources
- [A Michigan lab is building sodium batteries that will never power a car, and General Motors says the chemistry cuts grid storage costs by 20 percent instead](https://gcn.com/michigan-lab-building-sodium-batteries-never/23255) - gcn.com