Originally Posted by
Scuffers
Current Tesla battery is some 544 kg (85 kWh) without any electronics, cooling, etc.
Solar panels are not zero weight either, and 1+Mw of them is going to make a big dent in the payload capacity.
A lot of that weight is the frame, in a car the weight is a lower priority.
The solar panels on the aircraft that just flew around the world are pretty light.
The dent in the payload capacity is going to shrink the longer you intend to fly compared to fuel for an engine.
Electric motors are far lighter per watt than IC engines, more reliable and less maintenance.