Comment by Retric

Your car is presumably not always at home. So, a solar panels on the roof of your house don’t increase the range of your car. At highway speeds assuming regular charges that’s mostly irrelevant. But if you’re camping or run out of charge it could become so.

Even relatively small solar arrays could keep a car from discharging at an airport parking lot etc. That could extend to running the climate controls when your shopping without concern for draining the battery.

PS: That said, the roof also has many advantages such as allowing you to park in a garage without issue.