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People do aftermarket EV batteries to home batteries, but what I’d like to see, is the OEM providing a second life conversion rather than a 3rd party conversion.
The battery itself has no problem giving or taking power it just needs the right hookups. Take the battery out, put it into a home battery shell made specifically for your car and instant huge home battery that’ll last a week or longer.
I doubt any OEM wants to provide the conversion though as they want you to buy their own home battery systems. Tesla isn’t the only one doing that today, and I suspect that all EV auto manufacturers will move into the home storage game as they get more experience with batteries and need a way to derisk the car business.
Having another use for their batteries (home/commercial) gives them room to buy more cells for less and then favor either business as market conditions dictate (e.g teala favoring cars over home storage when cells were in short supply)
Teslas plan for the 4680 packs is to just recycle them at end of car life but that’s just a waste. Reuse before recycle!
Also, the LFP batteries are perfect for this. They’ll outlive a cars useful life unless it’s maybe a commercial taxi kind of situation. Those things have crazy cycle counts.