As an electrical engineer I have to sadly inform you that electricity transport is not free. Transporting electricity from those places to the places with popul

As an electrical engineer I have to sadly inform you that electricity transport is not free. Transporting electricity from those places to the places with populations is overall inefficient. So the best place for a solar panel is right next to were the energy is needed (provided there is at least some sun). Solar installations in deserts could still be a thing if you are willing to think it differently (e.g. use the energy for desalination and to split water into hydrogen and oxygen, transport that hydrogen via container ship etc).