[DennisP]

Well that depends on the car. Solar race cars cross the country on sunlight: https://en.wikipedia.org/wiki/Solar_car_racing

Aptera is less extreme than that, but still a lot more efficient than a normal car, mainly due to aerodynamics, plus light weight and three wheels. Take a glance at aptera.us and you'll see how far they took the aerodynamics.

They claim up to 40 miles of range collected per day, if you're someplace like southern California, and max out their panel options. The car is pretty flat and wide, which also helps.

If you don't have much sun available, you can plug into a regular wall outlet and add range reasonably quickly.