Peak Energy Banks $108M Series B to Scale Sodium-Ion Push

Peak Energy has closed a $108 million Series B round led by General Motors Ventures, money the company says will fund domestic manufacturing scale-up and a backlog of more than $1 billion in customer orders. The round was oversubscribed, with participation from Maverick Silicon, Infinite Capital, Eclipse, Xora Innovation and LG Technology Ventures. The company announced the close in October and confirmed it in a November 13 statement.

The financing targets one bottleneck above all: data centers, where access to power has become the primary constraint on growth. Peak Energy supplies sodium-ion battery storage (a chemistry that uses sodium rather than lithium as the charge carrier), and it positions the technology as the leading alternative to lithium-ion for grid-scale applications.

"Peak's mission from day one has been to lower the cost of energy through safer, simpler, cleaner, and more reliable technology," said Landon Mossburg, co-founder and chief executive officer of Peak Energy, in a press release. "The investment we announce today will supercharge Peak's ability to scale and deliver as the world increasingly turns to passively cooled sodium-ion storage to solve our energy needs."

What does the money buy?

Three concrete commitments sit behind the round.

• Manufacturing capacity: a 4 GWh factory in Sacramento, California, unveiled in July, with production scheduled to start in Q1 2027.
• Order fulfillment: more than $1 billion in existing customer commitments from utilities, power producers and data centers.
• Product launch: entry into the data center storage market.

The company claims it took sodium-ion from a promising concept to a recognized global category in three years. That claim is a supplier statement, and it will be testable against actual output once Sacramento begins running.

Where does GM fit in?

GM's involvement runs deeper than venture capital. In June, the two companies announced a partnership to jointly develop next-generation sodium-ion battery cells for the storage market, drawing on GM's U.S.-based battery cell industrialization expertise to support Peak's ramp.

"GM Ventures is investing to help Peak Energy continue to scale this innovative technology because we believe it has significant potential in the energy storage market as a safe, cost-effective solution using abundant, domestically sourced materials," said Kevin McCabe, president of GM Ventures, in the same press release.

For GM, the deal extends battery cell manufacturing know-how built for its EV programs into a second market. For Peak, it supplies the industrialization muscle a 4 GWh ramp demands.

Why passive cooling is the cost argument

Peak's flagship system is passively cooled, meaning it dispenses with the active cooling equipment that consumes power in conventional storage installations. The company says this architecture cuts the cost of energy by up to 20% compared with conventional systems, extends operating life and requires zero planned maintenance. That figure is a company claim; it will face scrutiny as deployed fleets accumulate operating data.

The system also emits virtually no noise, consumes zero water and removes the leading causes of battery fires, according to the company — attributes aimed at community acceptance for projects sited near residential areas or data center campuses.

Who else is backing it?

Maverick Silicon, a fund focused on the silicon-to-systems supply chain, tied its investment directly to AI infrastructure demand.

"We spent a lot of time looking at the growing power requirements around AI infrastructure, and it became clear that energy storage is going to be an increasingly important part of the solution," said Kenneth Safar, managing director at Maverick Silicon, in the same statement. "Peak is taking a differentiated approach to sodium-ion, with a focus on the full system from chemistry and design through manufacturing and deployment at scale."

What to watch next

The near-term milestone is Q1 2027, when the Sacramento plant is scheduled to start production. Watch for confirmation of the production start date, the first disclosed shipments against the $1 billion order book, and evidence on whether the claimed 20% cost advantage holds in commercial operation.