CATL is starting deliveries of its first commercial sodium-ion battery energy storage systems this month, marking a long-anticipated commercialisation milestone for a chemistry many analysts had written off two years ago. The Chinese battery giant expects shipments to reach roughly 1 GWh by the end of 2026, with initial systems flowing to Chinese grid customers.
From lab bet to grid-scale product
Sodium-ion chemistry sidesteps lithium supply constraints and performs better in cold weather than LFP, but higher pack costs and lower energy density held it back from mainstream storage duty. CATL says raw material costs have roughly halved in the past year, putting the technology on course to reach cost parity with lithium iron phosphate by the end of 2026 and enabling the September deliveries at commercially competitive prices.
Hyperstrong anchors the order book
The commercialisation follows a 60 GWh sodium-ion supply agreement CATL signed in April with Chinese system integrator Hyperstrong — the largest publicly announced order for the chemistry to date and a de facto validation of grid-scale viability. CATL has also lined up a European channel through Dutch integrator Alfen for 5 GWh of sodium-ion storage deployments.
What it means for the storage stack
For utilities and IPPs, sodium-ion offers a second supply chain for large-scale storage that is more insulated from lithium spot prices and Chinese export controls. Analysts caution the chemistry is "not a silver bullet" and will initially complement rather than replace LFP, but a GWh-year of shipments in 2026 will give operators the first real dataset on cycle life, safety and system economics in the field.
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Reporting based on coverage from Energy-Storage.News, Car News China and CATL statements.