Grid Batteries Without Lithium Now Have a Delivery Date
CATL unveiled its TENER Sodium Energy Storage System and said deliveries to Chinese customers would begin in September 2026, with 1 GWh of shipments expected by the end of the year.
When ORGEL president Kyle Orgel joined The Green Transition Show earlier this year, he noted that sodium-ion batteries were approaching commercialization and outlined their benefits. CATL's case is that lithium supply is concentrated and volatile in price, while sodium is widely distributed and offers better extreme-temperature performance, safety and cost potential.
Sodium-ion grid batteries are not new, because a 100 MWh station in China entered service in June 2024. What changed this year is scale. CATL says it has added 200 GWh of annual sodium-ion capacity, which is enough cells for 2,000 stations the size of the one in China. The system delivers more than 30 MWh and supports durations of 1, 2, 4, 6 or 8 hours.
The U.S. Energy Information Administration reported in August 2026 that utility-scale battery capacity grew at an average annual rate of 70% over the past three years, reaching nearly 52 GW by mid-2026. The organization explains that the growth in the market is the result of California's net load drops at midday when solar output is highest. The net load then climbs in the evening when demand remains but solar drops off. The batteries store daytime solar energy and then deploy it to the grid after the sun sets, solving renewable intermittency.
Two cautions apply. First, CATL's sodium cell stores roughly half as much energy as the lithium cell built on the same platform, so a sodium project needs about twice as many cells and physical space for the same stored energy. CATL's release says production costs for NFPP, a sodium cathode material, are expected to decline further as the technology matures, so the cost can improve but it is a projection for now.
Second, chemistry alone does not make a market. Natron Energy, a U.S. sodium-ion maker, shut down in September 2025 after it could not raise new funding. Media sources tied the closure to a small pool of sodium-ion demand while lithium iron phosphate supply expanded. The question for a buyer is whether sodium-ion beats lithium iron phosphate on delivered cost, and doesn’t win just because sodium is abundant.
For a U.S. buyer, one domestic path is Peak Energy, which recently announced a Sacramento factory set to create up to 4 GWh a year, with production planned for the first quarter of 2027. The practical step is to ask a sodium-ion vendor for cycle-life test data at your site's temperatures and their warranty terms.
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