Solar Panel Cleaning: Why and When to Clean Your Panels

Bird droppings, lichen, moss and pollution build up on solar panels gradually. Most homeowners notice output drops of 10-15% over 3-5 years if panels are never cleaned. ## When cleaning pays off Clean panels when monitoring data shows a drop of 8%+ vs baseline. A £120 clean typically recovers £150-£200 of annual output — net gain in year one. ## The right way to clean We use deionised water and telescopic fibreglass poles. Never use detergents, abrasive sponges, or pressure washers — these damage the anti-reflective coating and void warranties. ## Regional factors Coastal properties ([Liverpool](/locations/liverpool), [Blackpool](/locations/blackpool), [Formby](/locations/formby)) accumulate more salt deposits. Rural properties near farms collect more pollen and dust. Urban areas ([Manchester](/locations/manchester), [Birmingham](/locations/birmingham)) have the heaviest soot accumulation. See our [solar panel cleaning service](/solar-panel-cleaning).