Solar panels can get dirty from dust, pollen, bird droppings, leaves, and pollution buildup. These contaminants block sunlight from reaching the photovoltaic cells, reducing the panel’s ability to generate electricity. In areas with little rain or high pollution, grime can accumulate quickly. Dirty panels can lose 10–25% of their efficiency, depending on the level of soiling. Regular cleaning and maintenance help ensure optimal performance and extend the lifespan of solar systems.

Solar panels are cleaned using deionized water and ultra-soft bristle brushes attached to a water-fed pole. This method avoids the use of soap, which can leave residue and harm panel surfaces. The deionized water prevents spotting and removes dirt effectively. This gentle, non-abrasive cleaning technique ensures panels remain free of dust, bird droppings, and grime, helping maintain maximum efficiency without damaging the protective coating on the solar glass.

Safety protocols are essential when cleaning rooftop solar panels. Workers should wear roofing boots with non-slip soles for secure footing and use safety harnesses attached to anchor points to prevent falls. Helmets, gloves, and high-visibility clothing add extra protection. Proper training in ladder safety and fall prevention is crucial. Following these protocols ensures a safe working environment while maintaining panels, especially on steep or high rooftops, where risks are significantly increased.

After a solar panel cleaning, expect improved energy efficiency and power output. Panels will appear clearer and brighter, with dust, debris, and grime removed. This allows better sunlight absorption, more consistent performance, and potentially lower energy costs from optimized system operation.