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Sometimes we create our own problems.
(lemmy.world)
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this post was submitted on 28 Apr 2025
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End of life EV batteries are great for grid-scale operators doing power storage, but I highly recommend against homeowners use them this way. Not just because they are complex DIY projects as you point out, but because the EV batteries that are aging out of car use are NMC chemistry. These are great for high density power storage, which you want in a car, but they are susceptible to thermal runaway if they get too hot. The original Tesla Powerwall and Powerwall 2 also used these same chemistry batteries. I wouldn't want these in my house. However, in a utility grid scale? Sure, they won't be anywhere near people so in the unlikely event they do catch fire its a property problem, not a lost human life problem.