[quote=Escoguy]If the car lasts 15 years, fuel savings would be about 25% of the cost of the vehicle. We’re on our fourth EV (Model S/Model 3)
Total investment to do this for solar would be about $22K.
Depending on energy consumption patterns, payback is about 5 years.[/quote]

Hmm, so you spend (aka save) $4400/year on gas/electric & gasoline?
I’ve looked at solar and maybe my consumption is low – I’ve never been able to get the payoff under 10 years. But then my house is fairly cool in the summer – almost never turn on the A/C.

Certainly for operating costs, the EV is much less than gas. But the acquisition costs are much higher for a comparable vehicle and the used market is still somewhat limited.
My current commute car is a 13 year old Camry, paid off, and only have liability insurance (~$300/year). Maybe when the new EVs come out in a few years.