[Texas Eagle]

Put some solar panels on the wings and the thing will fly forever.

[Vermont Lt]

Wasn’t there a large glider like craft that did just that.

[central_va]

Why can’t the propeller generate electricity and charge the batteries? /sarc

[norwaypinesavage]

"Put some solar panels on the wings and the thing will fly forever."

I presume you're joking. The surface area of the entire airplane isn't even close to receiving enough power from the sun even if 100% of the energy it receives is converted directly to electric power. Solar cells convert only a small fraction of that, and that's not even considering clouds and night time.