Solar Voltaic is now about .40 to .45 per watt before subsidies.
I have a SV array on my house. 8.5kw. It makes more than all the power I use, I could charge a car with it if I had a plug in electric, but I’d probably need a somewhat bigger system to cover all my current electric us plus a plug-in car.
When we were talking to solar companies about a system, whether we planned to buy a plug-in hybrid or all electric car was a factor in sizing our system/choosing the kind of panels we installed.
My system uses the grid as battery and backup, so I could not charge the electric car w/o the grid, but assuming I was charging the car on a reasonably sunny day, the power to the car would be coming from my roof. At night or on a cloudy day, all or some of the power would be coming from the utility, but because of “net metering” my surplus generation at other times could offset and replace this power.