According to the CIU charge calculator 3ft +7ft+16 multiplied by the amount of air you can suck in on one breath added to the amount of times you shake your head and tut = £500 to £700 depending on what car is on the driveway.Seriously asking what to charge on here is only going to leave you more confused than you are now. lol
£30.theyll take you less than 30 mins to clean.i use a flocked brush on a 90degree gooseneck so the brush is flat on the panel.good little add on to your existing work.
You can't do the job until your certified. Better check with Solar Steve!