The appearance is antique, but the contents are high performance dating tractor

I made a solar panel on a tractor made in 1954 so that it can be moved with sunlight. It is a retro look, but high performance that can move forever as long as the sun is out. It seems that many parts diverted as they are, but is durability all right?

Details are as below.
Power is enough, too.
YouTube - solar converted tractor


Here is a movie of a tractor that was remodeled at high speed.
YouTube - Traktor imt GTI