Peak Sodium-ion Battery factory in Sacramento marks a major new investment in US energy storage manufacturing. On July 9, 2026, Peak Energy Technologies said it will invest up to USD 71 million to build a grid-scale battery factory in Sacramento, California. The site will manufacture sodium-ion battery energy storage systems for utility and commercial projects. As a result, the company is expanding domestic production while supporting growing demand for long-duration and grid-focused storage.
Peak sodium-ion battery factory in Sacramento to add 4 GWh of capacity
Peak Energy Technologies plans to develop a 183,000-square-foot factory in Sacramento’s Metro Air Park. The company said the facility will produce up to 4 GWh of battery storage systems each year. In addition, Peak expects the plant to start production and shipments in the first quarter of 2027.
The Sacramento project stands out because of its scale and timing. Utilities, developers, and large energy users continue to add storage to balance renewable generation and improve grid flexibility. Therefore, a new 4-GWh manufacturing base can help meet rising US demand with locally produced systems.
Why Peak chose Sacramento for its sodium-ion battery factory
Peak selected Sacramento after a competitive nationwide site search. The company pointed to strong state support and a suitable industrial location. Moreover, California awarded Peak a USD 10.5 million CalCompetes tax credit, which helped strengthen the business case for the project.
The factory will also bring new jobs to the region. Peak expects the investment to create 239 jobs in the Sacramento area over the next 18 months. That hiring plan adds an economic development angle to the project, while also building local expertise in advanced battery manufacturing.
Because Sacramento already serves as a growing clean energy hub, the location offers access to infrastructure, skilled labor, and transport links. Consequently, Peak can move faster from construction to commercial output.
Peak sodium-ion battery factory in Sacramento already has customer demand
Peak said it has secured customer commitments for more than 6 GWh of its passively cooled sodium-ion battery systems. That figure exceeds the factory’s annual nameplate capacity, which signals strong market interest ahead of the plant’s launch.
Two major customers support that demand. Peak named Jupiter Power and Energy Vault among companies that have committed to its systems. In addition, RWE Americas signed an agreement to test Peak batteries at its laboratory site in eastern Wisconsin. These commercial relationships give the Sacramento factory a solid base as it moves toward production.
Importantly, passively cooled battery systems can simplify system design and support reliable grid applications. That positioning may help Peak serve projects that need efficient, scalable storage solutions across US power markets.
Partnership with General Motors adds momentum
Peak recently announced a partnership with General Motors. Under that agreement, Peak will integrate GM sodium-ion battery cells into its energy storage systems. This step adds further credibility to the company’s supply chain and product strategy.
Moreover, the partnership shows that established industrial players see value in sodium-ion technology for stationary storage. For Peak, that collaboration can support product development, scale-up, and future deployment opportunities.
What the Peak sodium-ion battery factory in Sacramento means for US energy storage
The new Sacramento factory highlights continued investment in US battery manufacturing. It also reflects wider interest in diversifying storage technologies for grid applications. While Lithium-ion remains dominant, sodium-ion is gaining attention for stationary energy storage projects that value manufacturing flexibility and dependable performance.
Peak’s project also aligns with the broader push to expand domestic energy infrastructure. By building in California, the company can supply US customers from a local production base. That approach may shorten delivery timelines and strengthen supply planning for project developers.
Just as importantly, the factory combines several market signals in one announcement. It includes a sizable capital investment of up to USD 71 million, annual capacity of 4 GWh, more than 6 GWh in customer commitments, and 239 expected jobs. Together, those figures show that Peak is moving beyond concept stage and into commercial execution.
Key facts about the Peak sodium-ion battery factory in Sacramento
• Company: Peak Energy Technologies
• Location: Metro Air Park, Sacramento, California
• Investment: Up to USD 71 million
• Facility size: 183,000 square feet
• Annual production capacity: Up to 4 GWh
• Production start: First quarter of 2027
• State incentive: USD 10.5 million CalCompetes tax credit
• Jobs expected: 239 over the next 18 months
• Customer commitments: More than 6 GWh
• Named partners and customers: Jupiter Power, Energy Vault, RWE Americas, and General Motors
Overall, Peak sodium-ion battery factory in Sacramento gives the US energy storage market a significant new manufacturing project to watch in 2026 and 2027. With committed customers, state support, and a clear production timeline, Peak is positioning Sacramento as a new base for large-scale sodium-ion battery system output.
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