"Sodium-ion batteries promise cheaper, more durable energy storage. Peak Energy seeks to kick-start the next-gen battery market by building the first big U.S. plant."
"Startup Peak Energy launched in 2023 with a promise to bring the up-and-coming sodium-ion battery chemistry to American shores. Now, it’s building a gigafactory in Sacramento, California, that will be the country’s first to produce sodium-ion battery storage plants for the grid.
If Peak Energy succeeds in its broader mission, it will introduce a new generation of batteries better suited for grid storage than the dominant lithium-ion chemistries, which are effectively hand-me-downs from electric vehicles. These sodium-ion batteries can run safely at a broad range of temperatures, company leaders say, meaning they can operate more cheaply and durably than the lithium-ion phosphate (LFP) cells that have become the go-to for stationary storage.
“We’ve gone from proving the technology out and having really great interest to having contracted business with customers that we have to go deliver on,” said Peak’s CEO and co-founder Landon Mossburg. Chinese battery companies have begun scaling sodium-ion production in recent years, but the technology hasn’t broken into the Western power sector yet. Peak is at the forefront of startups trying to make that happen.
Peak assembled a cohort of interested developers to observe the design and piloting of its storage technology, which it installed at a Colorado testing facility last year. Several power producers signed up for small pilot installations this year, with much bigger orders teed up for 2027. So far, the company has worked with manufacturers in China to supply cells to its specifications and then assembled them into containers at its existing facility in Burlingame, California. That site can produce only 100 megawatt-hours per year — roughly 32 units at 3.1 megawatt-hours each — as a function of its size and reliance on some manual work rather than full automation."
Julian Spector reports for Canary Media July 10, 2026.
