> At least as long as a substantial percentage of total charge can come from the integrated solar

Yes, but that's highly doubtful. It doesn't work for EVs with panels on the car's roof - you don't get significant charge from it. It's far more practical to put the panels on a larger, fixed structure where the vehicles charges daily.

Sources e.g.

https://octopusev.com/ev-hub/why-dont-electric-cars-have-sol...

https://www.forbes.com/sites/billroberson/2022/11/30/why-doe...

https://www.reddit.com/r/NoStupidQuestions/comments/ykwd89/w...