Sodium-ion Battery storage in California is gaining momentum as ESS Tech and Juniper Energy move forward with a major new deployment plan. The companies signed a Letter of Intent for more than 500 megawatt-hours of sodium-ion energy storage projects. As a result, they aim to support rising power demand with domestically sourced battery materials and modular storage systems.
First, the partnership will focus on a 10-megawatt, 80-megawatt-hour energy storage project in California. ESS plans to supply its modular sodium-ion battery platform, called Bridge, along with its Energy Management System. In addition, the companies want the site to begin operating by 2027. If the first project performs well, Juniper Energy expects to procure at least 500 megawatt-hours of additional sodium-ion battery systems by 2032.
Sodium-Ion Battery Storage in California Starts With an 80 MWh Project
The first step in this agreement centers on a California project sized at 10 megawatts and 80 megawatt-hours. This scale gives ESS and Juniper Energy a clear path to demonstrate commercial sodium-ion storage in a real-world setting. Moreover, the site will show how modular energy storage can support flexible grid and facility needs.
ESS designed the Bridge platform to serve large energy users and project developers that want scalable storage. Therefore, the California deployment will act as an important proof point for future installations. The project also reflects growing interest in battery systems that use abundant domestic materials. Because sodium is widely available, developers can build projects with a supply chain that aligns with U.S. sourcing goals.
Why Sodium-Ion Battery Storage in California Is Expanding
Energy demand remains strong across utilities, commercial operations, and digital infrastructure. At the same time, developers want battery technologies that support long-duration needs and domestic procurement strategies. For that reason, sodium-ion battery storage in California stands out as an attractive option for upcoming projects.
ESS says its non-lithium battery systems can serve a broad range of applications. These include utility-scale installations, commercial facilities, AI data centers, and critical infrastructure. Furthermore, projects that use domestic materials can align more closely with sourcing preferences in the United States. That benefit can simplify planning for developers that want dependable and scalable storage systems.
Drew Buckley, CEO of ESS, said the agreement supports the company’s strategy to expand its technology portfolio and bring sodium-ion energy storage to market. He added that the planned deployment and long-term procurement framework reflect rising customer demand for safer and domestically sourced alternatives to conventional Lithium-ion batteries.
Sodium-Ion Battery Storage in California Supports Long-Term Growth
The long-term part of the agreement may prove just as important as the first project. Juniper Energy plans to buy at least 500 megawatt-hours of additional systems by 2032 if the initial deployment succeeds. Consequently, the California site could open the door to a much larger buildout over the next several years.
This kind of framework matters in the energy storage market. A first project validates the technology in the field. Then, follow-on orders can help expand manufacturing, speed deployment, and support wider adoption. In this case, the agreement gives both companies a structured path from initial installation to broader commercial use.
Keith McDaniels, Managing Partner of Juniper Energy, said the company looks for partners that can move innovative energy technologies from development into commercial operation. He said ESS has shown its ability to integrate, deploy, and scale advanced energy storage solutions. He also said Juniper Energy looks forward to validating the ESS Bridge platform and supporting broader adoption in future storage projects.
Sodium-Ion Battery Storage in California for Utilities and Data Centers
The market opportunity extends beyond one project. California continues to need reliable storage to support renewable power, large facilities, and expanding digital infrastructure. Meanwhile, AI data centers and critical operations require stable power strategies. Sodium-ion systems can help meet those needs with modular designs and domestic material sourcing.
For utilities, the value comes from flexible storage capacity that can support grid operations. For commercial users, the appeal includes scalable systems for high-demand facilities. For infrastructure operators, dependable battery platforms can strengthen energy planning. As a result, sodium-ion battery storage in California fits several high-growth segments at once.
What the ESS and Juniper Energy Agreement Means
The agreement marks a notable step for commercial sodium-ion energy storage in the United States. It begins with an 80 megawatt-hour California project targeted for 2027. After that, it could expand to at least 500 megawatt-hours more by 2032. Those figures make the deal significant for both companies and for the broader storage market.
Overall, ESS and Juniper Energy are positioning sodium-ion battery storage in California as a practical option for large-scale energy needs. The project combines modular technology, domestic sourcing, and a multi-year procurement path. Therefore, this deployment plan could become an important example of how sodium-ion systems scale across utility, commercial, and critical infrastructure markets in 2026 and beyond.
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