Sodium-Ion Crossed From Pilot to Production. It Still Does Not Undercut LFP.

Written 27 August 2026. Cost and energy-density figures vary considerably between sources — treat the ranges as indicative.

Sodium-ion batteries have been eighteen months from commercialisation for about a decade. In 2026 that changed, and the evidence is contractual rather than technical.

On 27 April 2026, CATL and Beijing HyperStrong announced a three-year, 60 GWh sodium-ion supply agreement for energy storage — described as the largest sodium-ion order announced to date. What makes it different from previous sodium-ion news is that it pairs a contracted volume at industrial scale with a stated production-readiness timeline, rather than a demonstration project or a memorandum of understanding.

Earlier, in February 2026, CATL and Changan unveiled the first mass-production passenger vehicle with sodium-ion cells, using CATL’s Naxtra chemistry, for a mid-2026 launch. CATL has said it expects at least 10,000 EVs to use its sodium batteries during 2026.

• •Energy density: roughly 150–175 Wh/kg at cell level, against about 170–185 for LFP and 250–280 for high-nickel NMC.
• •Cost: reported cell costs cluster in the $55–70/kWh range. Note that this is not below LFP in China, where LFP cells are quoted at $55–65/kWh.
• •Advantages that are not density: cold-weather performance, thermal stability, and a supply chain with no lithium, cobalt or nickel exposure. It also uses aluminium current collectors on both electrodes rather than copper on the anode side, which removes a real cost item.

The consistent read across analyses is that sodium-ion wins where energy density matters least and cost and supply security matter most: grid storage first, then short-range mobility — two-wheelers, three-wheelers, urban delivery.

That is precisely the Indian market. India is the world’s largest market for electric three-wheelers.

The physics supports the segmentation. Sodium’s ion is 34 per cent larger than lithium’s and its atom is 3.3 times heavier, which caps capacity at around 1,166 mAh/g against lithium’s 3,862. It also will not intercalate into graphite, so sodium cells need hard carbon anodes with a sloping rather than flat voltage curve and lower first-cycle efficiency.

None of that is fatal for a vehicle doing 60 to 80 km a day at low speed. All of it is fatal for a long-range car. Why sodium behaves that way is covered in why lithium won.

Faradion, acquired by Reliance Industries, is the most visible domestic name, with Jamnagar capacity reported as scheduled for 2026 start-up. India’s ACC PLI programme is chemistry-neutral, so sodium-ion investment qualifies under it.

The most likely outcome through the next decade is a dual-chemistry market rather than a replacement — LFP holding the high-energy applications, sodium-ion taking share where its supply-chain and thermal advantages outweigh its density deficit.

For anyone in three-wheelers, that makes sodium-ion worth watching closely and not yet worth designing around. The signal to watch is not another density announcement; it is a second large contracted order, or a sodium cell quoted below LFP for a comparable specification.