A massive industrial manufacturer of sodium-ion battery systems is being constructed in Northern California. The 183,000-square-foot Sacramento plant will be able to produce 4 gigawatt-hours of sodium-ion battery systems per year, enough batteries to power almost four million households. This marks a major step forward for the state’s clean energy sector as well as a considerable endorsement of sodium-ion battery technologies as a promising next-gen storage solution.
The plant will be the first production site in the country dedicated solely to manufacturing grid-scale sodium-ion energy storage systems for utility companies to use during peak demand hours. Peak Energy, the developer of the project, says that their technology will reduce costs considerably for utilities’ energy storage needs. These novel storage systems manage operational heat without the need for mechanical components like fans or liquid pumps, significantly reducing long-term operating expenses.
“Peak’s passively cooled sodium-ion battery energy storage systems, which reduce the cost of energy storage by 20% and have a 99% guaranteed uptime, are expected to enter production and begin shipments in Q1 2027,” the firm wrote in a recent press release.
The global energy storage sector is currently dominated by lithium-ion batteries, but sodium-ion batteries have been garnering increasing attention for their unique benefits and their potential to diversify global battery supply chains. The world’s lithium supply chains are almost entirely controlled by China, raising key geopolitical concerns. Plus, lithium spot prices have been extremely, well, spotty in recent years, encouraging investment into alternative technologies.
China’s Contemporary Amperex Technology Co., Limited (CATL), the world's largest battery maker, just debuted its own sodium-ion storage system called TENER. The company has announced that domestic deliveries of TENER will start in September and global shipments are slated for 2027. “While energy storage becomes the critical infrastructure in our modern society, the stable and sufficient supply of raw materials plays an important role in this industry,” William Wu, director of CATL’s energy storage system technical centre, was recently quoted by the South China Morning Post in relation to the company’s new focus on sodium-ion battery models. “CATL is committed to promoting energy independence for all countries and regions.”
The development of a large battery plant for energy storage on United States soil marks a major step forward in a global clean energy sector that China currently dominates. But by focusing on sodium-ion batteries rather than lithium, which are a novel technology for both economic giants, the playing field is more level. This could be a critical strategy for the United States to claw back at least one small part of the clean energy sector after years of letting China run away with the competition.
And the timing could not be better, as energy storage becomes a more critical component of energy security against the backdrop of skyrocketing electricity demand driven by the artificial intelligence boom, as well as the expansion of variable energies like solar and wind power. Energy demand from data centers in the United States is expected to double between 2025 and 2027 to reach a whopping 66 gigawatts. This is going to require a massive expansion and reinforcement of the country’s ageing and stressed power grids.
“The market for grid-scale batteries and backup power isn’t just expanding, it’s becoming essential infrastructure,” Kurt Kelty, General Motors’ vice president of batteries, propulsion, and sustainability, stated in a 2025 press release related to the company’s own pivot toward batterymaking for energy storage rather than electric vehicles. “Electricity demand is climbing, and it’s only going to accelerate. To meet that challenge, the U.S. needs energy storage solutions that can be deployed quickly, economically, and made right here at home.”
