Peak Energy, based in Burlingame, California, announced on October 21, 2026 that it has closed an oversubscribed Series B financing round worth US$108 million. The round was led by General Motors Ventures, with participation from Maverick Silicon, Infinite Capital, Eclipse, Xora Innovation, and LG Technology Ventures. The new capital will help the company scale domestic manufacturing, fulfill more than US$1 billion in existing customer orders, and expand its passively cooled sodium-ion platform into data center power infrastructure.
Funding and Investor Support
Peak Energy said the financing was oversubscribed, reflecting strong investor confidence in its sodium-ion storage technology. Chief Executive Officer Landon Mossburg stated that the investment will supercharge the company's ability to scale and deliver as demand for passively cooled sodium-ion storage grows. He added that Peak's mission from day one has been to lower the cost of energy through safer, simpler, cleaner, and more reliable technology.
Domestic Manufacturing Expansion
The Series B capital positions Peak to accelerate production at its 4 GWh manufacturing facility in Sacramento, California, which is expected to begin output in the first quarter of 2027. The company unveiled the factory in July and has already secured over US$1 billion in commercial agreements with customers including Jupiter Power, RWE, and Energy Vault. Peak says the investment will support delivery of those commitments while it addresses rising demand from utilities, power producers, and data center operators.
Technology Advantages
Peak Energy's passively cooled storage system is engineered to reduce complexity by eliminating cooling systems, which lowers operating and maintenance costs. The company reports that its fundamentally simpler architecture can cut the cost of energy by up to 20% compared with conventional storage systems. It also delivers longer operating life and lower lifetime ownership costs through reduced energy waste and zero planned maintenance.
Safety and Environmental Benefits
The system emits virtually no noise, consumes zero water, and eliminates the leading causes of battery fires, making it a safer and more community-friendly alternative for energy storage. Peak says the design addresses community and ratepayer concerns around affordability and safety while improving reliability and energy efficiency. As AI-driven demand accelerates, data center operators need storage solutions that deliver more usable power and better outcomes for surrounding communities.
Data Center Demand and Strategic Partnerships
In June, Peak Energy announced a partnership with General Motors to jointly develop next-generation sodium-ion battery cells for the storage market and to use GM's battery cell industrialization expertise. GM Ventures president Kevin McCabe said the investment reflects confidence in a safe, cost-effective solution that uses abundant, domestically sourced materials. Kenneth Safar of Maverick Silicon added that AI infrastructure power needs make energy storage increasingly important and Peak's full system approach could build a defining platform.
The Series B round marks another milestone for Peak Energy, which has moved sodium-ion from a promising concept to a recognized alternative to lithium-ion for grid-scale applications in three years. With a new factory, strategic backing from General Motors, and a growing order book, the company is positioned to support both grid and data center markets. Its emphasis on safety, lower costs, and domestic manufacturing aligns with broader demand for more reliable and affordable energy storage.