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We were out in North Fontana helping a homeowner get their system back on track. The panels had a solid layer of dust and debris caked across the surface - the kind of buildup that blocks sunlight from hitting the cells the way it should. In this area, with dry, dusty conditions and plenty of wind, it doesn't take long for panels to get coated.
Here's the thing about solar panel cleaning that most homeowners don't realize - it's not just about looks. Dirty panels are genuinely less efficient panels. When grime sits on the glass, your system works harder to produce the same amount of energy. A thorough cleaning gets the surface clear so the cells can absorb as much light as possible, which is exactly what you paid for when you had the system installed.
We also noticed bird-proofing mesh already installed around the perimeter of the panels at this home. That's a smart move. Birds love to nest under solar panels, and the mess they leave behind - droppings, nesting material, debris - is one of the biggest sources of panel contamination. If your system doesn't have bird-proofing in place yet, it's worth looking into alongside a regular cleaning schedule.
A clean system is a system that performs. If your panels are sitting under a layer of dust and you can't remember the last time they were serviced, that's a good sign it's time to get them looked at.