JAC Motors, a Volkswagen-backed Chinese automaker, unveiled the first mass-produced EV with a sodium-ion battery through its new Yiwei brand. Although sodium-ion battery tech has a lower density than lithium-ion, its lower costs, simpler and more abundant supplies and superior cold-weather performance could help accelerate mass EV adoption.
If they can get industrial scale it could also allow energy grids to capture excess power instead of wasting it. Could yield massive efficiency increases being able to reclaim some of that loss.