Peak Energy's CEO on Closing US$323.5M Sodium-Ion Deal Before Building a Factory
Key points
Key takeaways from a CleanTechies podcast interview with Peak Energy CEO Landon Mossburg (February 2026):
The Jupiter Power deal. Peak Energy signed a multi-year agreement to supply up to 4.75 GWh of sodium-ion battery systems to Jupiter Power between 2027 and 2030, with a total contract value exceeding $500M. The first deployment, a 720 MWh project in 2027, is the largest announced single sodium-ion deployment to date.
Pilot programme as a sales engine. From founding, Peak ran a multi-stage pilot programme giving marquee customers (IPPs such as Jupiter Power, utilities, and international players) early data and a product-design voice. In exchange, participants signed MOUs expressing purchase intent if the pilot delivered, which fed directly into the seed-to-Series A raise.
First principles on cell cost. Peak attacked the roughly 10x gap between the ~$45/kWh battery cell and installed grid-scale system cost, building what it calls the world's first passively cooled grid-scale ESS. Passive cooling removes liquid-cooling opex, the core of its total-cost-of-ownership story.
Funding the pilot itself. Peak paid for its own pilot and shared the data broadly rather than asking one customer to fund it — the reverse of the usual model. Customer input from that programme pushed the company to go fully passive about a year in.
Capacity reservation agreements. CRAs are a standard structure: an intent to reserve future capacity, converting to purchase orders roughly a year out. They signal to investors and bankability partners that demand continues beyond the first deal; Peak also holds one with Energy Vault (1.5 GWh supply agreement announced February 2026).
Technoeconomic advantage and bankability. Modelling a Peak system against a legacy actively cooled LFP ESS generates an average ~5% increase in project IRR, on projects that typically run at 9-10%. Simpler, safer installation also cuts permitting and interconnection risk, helping customers raise project finance.
LFP-compatible supply chain. Peak's cell shares bill-of-materials and manufacturing platform with LFP, so it can tap existing cell capacity instead of building gigafactories. Sodium-ion cells currently cost $10-30/kWh more than LFP cells but are falling ~$15/kWh year over year; partners are mostly in China today, with Asian and US options emerging.
AI as the demand driver. Power is bottlenecking data-centre buildout: FERC has ordered expedited interconnection procedures for data centres (PJM published the first draft). Sodium-ion's insensitivity to the rapid cycling of AI training loads — which degrades LFP — makes Peak's cells well suited to that market.
Contrarian view. Mossburg argues solar-plus-storage and wind-plus-storage are the most credible, cheapest solutions for scaling energy over the next 30-50 years, and worries capital flowing to nuclear, fusion and gas overbuilds them as bets against those cost curves.
Read more: YouTube · Peak Energy
