08/31/2026
☀️ Why solar panels need cleaning
Solar panels lose production when dust, pollen, dirt, bird droppings, soot, leaves, and other biological material build up on the glass. This is called soiling.
The National Renewable Energy Laboratory (NREL) reports that soiling can reduce PV output substantially. Across the U.S., annual losses can reach up to about 7%, while some environments around the world have experienced losses of 20–40% or more.