You do realize that's not a regular passenger electric vehicle, right? It's one of these and it most likely has lead acid batteries in it.
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All the statistics we have so far show that electric vehicles even accounting for numbers on the road burn far less than gasoline vehicles do. So You need to spend the same amount of worry about your EV burning in the garage as you would about lightning striking your house. Actually, I'd say it's a safe bet that more houses burned from lightning strikes and they do from electrical vehicle fires