[mtgx]

You mean like this?

https://www.youtube.com/watch?v=H5V0vL3nnHY

And I doubt solar panels would ever be used for charging the whole car in a very significant way, even if they had 80% efficiency.

[slxh]

Somewhat like this but while on the move

[mtgx]

In the future roads would probably contain wireless charging within them with solar panels alongside them.