COMMERCIAL AND RESIDENTIAL SOLAR PANEL CLEANING We are a Company situated in the South of England. We cover all areas of the UK including Scotland and Wales. Regular solar panel cleaning is required to maximise the power output of your entire system. It is recommended that they are cleaned twice a year. Solar panels cost you a lot of money, and they can only work at their maximum capacity when kept clean. You can not wash these panels with tap water and chemicals. The water will end up leaving calcium residue on the surface, creating a barrier between the photovoltaic cells and the sun. These residues add a layer of grime to the outside of the solar panels, they become less efficient in the amount of sunlight they can absorb. Only 100% de ionised purified water can be used to keep solar panels gleaming to enable them to give their best electricity producing rates.