CATL Launches Sodium-Ion Energy Storage System TENER, Deliveries in China Starting September
N.R. Finch
CATL unveiled TENER, a sodium-ion energy storage system, in Munich — China deliveries begin September, global rollout by June 2027 — marking sodium batteries' shift from lab showcase to commercial scale as rising lithium prices widen the opening.
What is TENER, and why now?
TENER is an energy storage system built on sodium-ion batteries — batteries that use sodium instead of lithium as the core raw material — designed for longer service life and extreme-temperature tolerance.
This means → it targets the two biggest pain points for grid-scale storage: batteries that degrade too fast and performance that drops in heat or cold.
Delivery rolls out in two phases: China from September, with 1 GWh shipped by year-end; global deliveries start June 2027.
What does the 60 GWh deal signal?
After disclosing its sodium battery technology in April, CATL quickly signed a three-year strategic agreement with Beijing Highstar to supply 60 GWh of sodium-ion cells.
In plain terms = this is the first strategic-scale procurement contract for sodium batteries — the jump from "the tech works" to "a customer will buy it."
Yet 60 GWh remains a very small starting volume against the global lithium-battery market; whether sodium can scale into a real substitute depends on follow-on orders.
How does rising lithium pricing actually help sodium?
Lithium carbonate spot prices have rebounded this year, directly compressing lithium batteries' cost advantage.
This means → the more expensive lithium gets, the better sodium's relative economics look — lithium pricing is opening a window for sodium.
Sodium is globally abundant with a widely distributed supply chain and no import dependency — in today's geopolitical environment, that supply-chain attribute carries extra value on its own.
The IEA called 2026 a pivotal year — is that holding up?
The International Energy Agency previously judged that 2026 "could be the pivotal year for sodium batteries," seeing the technology begin to challenge lithium-ion's dominance.
CATL's commercial launch is direct validation of that call.
But the real unresolved question is whether TENER's real-world performance and cost curve deliver on the promise — that will determine whether sodium becomes a meaningful alternative or stays a niche supplement.
Content is for reference only, not financial advice.