Charging your EV with home solar is a three-step process ==>
1) Install a solar system on your home.
2) Buy an EV or PHEV.
3) Plug it in.
I have long been very interested in the question of how much it (does not) matter(s) when one plugs one's electric vehicle in, especially if, like I do, I have the choice of plugging into a home rooftop solar system.
Many years ago, I wrote extensively on this web site/blog about the many intricacies and complexities of what I call "solar offset" charging of an electric vehicle vs. directly filling up with electricity that has been/is being produced directly by a (home rooftop) solar system connected to the same electrical box into which an EV charger and/or the wall-socket into which you're plugging your EV into.
We recently had two solar systems installed here at Highline Crossing Cohousing in Littleton, Colo.
It's taken three long years, but, finally, I am solar-charging my electric car, a 2020 Chevy Bolt, again!
About 10 years ago, in June of 2010, my ex-wife and I became the first homeowners in our Aurora, Colo. neighborhood to install a rooftop solar system on our single family home.