How to clean sand stains on photovoltaic panels

To clean solar panels, start by turning off the system for safety. Then, remove any loose debris with a brush or leaf blower. Visual inspection is the best way to d termine if your solar panels need cle ith an acidic cleaner to dissolve the minerals. Before. . Dust, dirt, pollen, bird droppings, and other debris can reduce energy output by 15–25%, according to the National Renewable Energy Laboratory. Before starting any cleaning procedure. . [pdf]