I already know of people that run their EV on their house solar system Norm,
it doesn't cost them a dime to run their EV in electricity ,the tyres are another matter though
$500. each for a Tesla tyre and they only last 30,000 km.
I kindly disagree about the zero cost. A solar system will have maintenance costs if nothing else. Even failed components that needs replacing costs the owner.
Every solar system does takes a considerable time to recoup the initial costs thru savings.