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.

Automotive solar panels like they use are about 20% efficient. Your average car roof is....let's be super forgiving and say 2sqm. So in the middle of the day, at the equator, you are generating about 400W of power.

The average EV battery is 50kWh. So you'd need 125 hours in full sun to recharge it fully. During a regular sunny day you'd get maybe.....2-3kWh back into your battery? So yeah, about enough to cover ~10 miles in a regular EV.

Sure it's better than nothing, but remember that this is in ideal conditions. In less than ideal conditions you are talking yeah, enough energy to cover a mile or two per day of charging. It's just silly.