Autonomous Solar Lawn mower

I would like to build an autonomous solar lawn mower just like this one : Vitirover robots in action in a vineyard - YouTube

I know there is a few subjects on this website but none with such idea of the combination of solar energy and a tiny energyefficient lawn mower.

I have already an pixhawk 2.4.8, an 100w solar pannel (20v) and an hand grass cutter to add on the front of the rover.
So i would like to know if you know some similar projects of lawn mower with the conversion of the solar power to the different parts of the rover.

Thanks in advance