How Much Efficiency Do Dirty Panels Lose?

Studies show that dirty solar panels can lose between 15 and 25 percent of their energy output. In Montana, where pollen season is heavy and summer dust is common, panels can accumulate significant buildup between rainfalls. Bird droppings are particularly damaging because they create localized hot spots that can permanently degrade panel cells over time. Regular cleaning maintains your system's rated output and protects your investment.

Safe Solar Panel Cleaning Process

Solar panels require careful handling — they are fragile glass surfaces with sensitive coatings. We use deionized or purified water combined with soft brushes and low pressure to clean panels without scratching the glass or damaging the anti-reflective coating. We never use harsh chemicals or high-pressure water directly on panel surfaces.

How Often to Clean Solar Panels in Montana

Once or twice per year is typical for most Montana residential installations. Spring cleaning after pollen season and fall cleaning before winter are the most impactful times. If you notice a measurable drop in system output between rainfalls, that is a strong indicator that cleaning is needed. Commercial and agricultural installations with heavier dust exposure may need more frequent service.

Frequently Asked Questions

Will cleaning void my solar panel warranty?

No — professional soft cleaning with purified water and appropriate brushes is the manufacturer-recommended cleaning method and will not void your warranty. Using harsh chemicals or high pressure could void the warranty.

Do you clean panels on steep roofs?

Yes. We have the safety equipment to work on steep residential and commercial roofs. Safety is our priority and we will not work in conditions that put our team at risk.