Solar powered plane
The plane is like a glider but it can cruise under electric engine power. It would have batteries that are fully charged before takeoff and then the engine uses the battery’s power during flight. The solar panels on the wings feed power into the battery. In my opinion there must be about 3.5 kilowatts of solar panels there. So in my opinion, the plane can use the panels to extend its battery ‘fuel’ and its range much further than if it didnt have any solar panels. Also, when you land you leave the plane in the sun and a day later you can fly again with fully charged up batteries again. Potentially the plane never needs plugging in to the mains power grid. It has the power of the sun!