I have had a look at Karlos’ video of the rotating solar panel brush and to me it looks very inefficient for all of its technology. It is going to be very heavy which will mean that it is slow and cumbersome to use. Also if you look at the amount of bristles in contact at any one time it is about a 1/4 of a standard brush. Personally i think that an operator would clean that panel more efficiently and quickly with a standard brush and pole. Of course I have not actually used this set-up so it is only my observational opinion as a window cleaner.
