this post was submitted on 27 Dec 2023
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This is awesome news. Not because of the car, but because it builds the supply lines for an alternative battery chemistry.
People have been using lithium-ion batteries for home and grid storage, which is nuts if you compare it to other battery types. Lithium is expensive and polluting and only makes sense if you're limited by weight & space. Cheaper batteries, even if they're bigger/heavier, will do wonders to the economics of sustainable electricity production.
Lithium makes more sense when weight is an issue, for example when you have to carry the battery around. Sodium batteries could be good for grid storage if they can be implemented as scale cheaply enough, especially using common materials.
Used car batteries can be reused for storage, so it's going to require a cost analysis to determine what makes most sense for storage solutions. It's great if they can use a cheaper sodium battery but we also don't want to just waste the second hand lithium batteries. It makes sense to use both. At least until there are better recycling options. Also with solid state batteries hopefully coming up soon, it'll still make sense to find use for the current batteries.
Ideally, home backups should be able to use any battery. Standards for compatibility would be nice.