Alternatives to green mowing
Perhaps a section can be made called "green mowing" in which the several green mowers are described. Besides making a pv electric mower, a regular mower on a electric battery is a better possibility (the PV panel is expensive, and can only catch sun when mower is outdoors). A PV panel on the roof of the house catches sun all the time and can also power the mower aswell as the house itself (if connected to a battery bank or other energy storage system).
also, another possibility is a conversion to a hydrogen internal combustion mower (by using hydrogen or oxyhydrogen as a fuel).
Finally, I would propose to change this article to a autonomous pv mower (perhaps with mulching). See http://en.wikipedia.org/wiki/Robotic_lawn_mower