Sodium-Ion Energy Storage Systems Market

The global sodium-ion energy storage system market size was USD 3.85 Billion in 2025 and is expected to register a revenue CAGR of 27.2% during the forecast period. Market revenue growth is supported by CATL, which announced at its Technology Day event on April 21, 2026 that its Naxtra sodium-ion battery achieved GWh-level industrialization after resolving four key engineering barriers, including extreme water control and gas generation in hard carbon anodes, and signed a 60 GWh sodium-ion supply agreement with energy storage integrator HyperStrong, the largest sodium-ion deal recorded to date. CATL confirmed in June 2026 that it expects to deliver its first sodium-ion energy storage systems to customers in September 2026, with annual shipments reaching GWh scale during 2026 as material costs have roughly halved. HiNa Battery, a spinout of the Chinese Academy of Sciences, established the first GWh-scale sodium-ion mass production line at its Fuyang facility and supplied cells for what it describes as the world's largest sodium-ion energy storage project, a 100 MW, 200 MWh installation. These are some of the key factors driving revenue growth of the market.

Layered transition metal oxide, Prussian blue and Prussian white analog, and polyanionic cathode chemistries are the principal commercial categories constituting the sodium-ion energy storage system market, with grid frequency regulation, renewable energy firming, and data center backup power representing the leading near-term application channels given sodium-ion's lower energy density relative to lithium-ion chemistries. For instance, in October 2025, Peak Energy, United States, commissioned the first grid-scale sodium-ion battery energy storage installation in the country, a 3.5 MWh passively cooled system using its NFPP polyanionic chemistry at the SolarTAC renewable energy test facility near Denver, Colorado, followed by a multi-year supply agreement with independent power producer Jupiter Power in November 2025 for up to 4.75 GWh of sodium-ion battery energy storage systems between 2027 and 2030.

However, Natron Energy, a Prussian blue sodium-ion pioneer founded at Stanford University in 2012, ceased operations entirely on September 3, 2025, laying off 95 employees across its Michigan and California facilities and abandoning plans for a USD 1.4 billion, 24 GWh gigafactory in North Carolina, after the company's board determined on August 27, 2025 that fundraising efforts had failed to secure sufficient working capital despite USD 363 million raised over 13 years and backing from Chevron and United Airlines. Natron's closure, following a pattern that also affected Sweden's Northvolt and Oregon's Powin, illustrates that Western sodium-ion manufacturers face a materially harder path to commercial viability than Chinese competitors benefiting from lower-cost domestic manufacturing and captive grid-scale procurement, and that unresolved UL certification timelines can compound cash-flow pressure even when purchase orders already exist. These factors substantially limit sodium-ion energy storage system market growth over the forecast period.

Based on cathode chemistry, the global sodium-ion energy storage system market is segmented into layered transition metal oxide, Prussian blue and Prussian white analog, polyanionic, and other emerging chemistries. The layered transition metal oxide segment commands the largest revenue share because CATL's Naxtra battery, which achieved GWh-level industrialization in 2026 and underpins the 60 GWh HyperStrong supply agreement, uses this chemistry class, and CATL's manufacturing scale gives layered oxide cathodes the largest disclosed near-term production volume of any sodium-ion chemistry.

Prussian blue and Prussian white analog segment is expected to register a rapid revenue growth rate in the global sodium-ion energy storage system market over the forecast period. Despite Natron Energy's 2025 shutdown, the underlying Prussian blue chemistry class remains attractive for fast-response applications including data center backup and grid frequency regulation because of its structural stability and rapid charge and discharge characteristics, and other manufacturers continue to develop Prussian blue and Prussian white variants for these same use cases even as Natron's specific commercial venture failed.

• 01What is the global sodium-ion energy storage system market size in 2025 and what CAGR is expected during 2026-2035?
• 02What GWh-level industrialization milestone did CATL's Naxtra sodium-ion battery achieve, and what supply agreement did it sign with HyperStrong?
• 03When does CATL expect to deliver its first sodium-ion energy storage systems to customers?
• 04What grid-scale sodium-ion installation did Peak Energy commission in October 2025, and what supply agreement followed with Jupiter Power?
• 05Why did Natron Energy cease operations in September 2025 despite raising USD 363 million over 13 years?
• 06What sodium-ion energy storage project does HiNa Battery describe as the world's largest?
• 07What sodium-ion manufacturing investment has BYD made in Xuzhou, China?
• 08Why does Natron Energy's shutdown not represent a verdict on Prussian blue cathode chemistry itself?
• 09What European sodium-ion research consortium is Fraunhofer FFB coordinating, and which automakers and battery makers are participating?
• 10Why does manufacturing cost structure and access to captive domestic demand matter more for sodium-ion venture survival than underlying chemistry performance?

This report covers the global sodium-ion energy storage system market across all major segments and geographic regions. Primary research combines panel conversations with industry experts and is cross-referenced against company annual reports and government agency data. All market size figures use 2025 as the base year with a 2026-2035 forecast period.