Ha ha! No one has ever "needed" a ride on mower, but I had this idea of a solar powered garden tractor / mower charging itself off solar. This was to be a trail run for a Series converson. The point of the ride on was its greater load capacity for the batteries. I did a lot of reseach and at the start there were various compaines claiming to be about to offer a battery electic ride on. 2 years later and only one seemd to be on the market and that was a Chinese one that was very clearly 95% mobility scooter and 5% mower, but rather depresingly, unlike all the mower looking ones, it actually worked. I'd already bought a mobility scooter to break and convert and that went pear shaped when my (then) 92 year old mother tried it and I never got it back so there went my motor, controller and batteries. The more I did the sums the less possible it looked, the problem was the power needed to spin the blades so I cut my losses and made it work as a petrol mower and, I'm afraid to admit, I like it. Yes I look like a knob on it and our garden is not really big enough, but doing the whole 100ft by 40ft lawn on a single grass box is bliss.