Of course, here "clean themselves" means To activate the system, a simple electrode passes just above the solar panel’s surface, imparting an electrical charge

Of course, here "clean themselves" means To activate the system, a simple electrode passes just above the solar panel’s surface, imparting an electrical charge to the dust particles, which are then repelled by a charge applied to the panel itself. The system can be operated automatically using a simple electric motor and guide rails along the side of the panel. So it's not exactly the cells cleaning themselves, imo. I wonder how well blowing (lightly) compressed air would work in comparison, since you're already sweeping past all the cells that sounds simpler.