How to Clean Solar Panels: Do You Really Need To?
Dust, pollen, and bird droppings cost a few percent of production. Here is when cleaning solar panels is worth it, how to do it safely, and when to hire a pro.
By The PVFig Editorial Team · 2026-08-10 · reviewed against EIA, NREL and DSIRE sources
When cleaning matters
Rain keeps most panels clean enough — unwashed panels typically lose only 2–5% of production. Cleaning pays off in dry, dusty areas, after pollen seasons, or when bird droppings accumulate. If you can't see a visible film from the ground, cleaning rarely pays for itself.
How to clean safely
Use a soft brush or squeegee with plain water early in the morning (cool panels). Never use harsh chemicals, pressure washers, or abrasive pads — they void warranties and scratch glass. Roof access is the real risk; ground-level cleaning or a pro is safer than DIY on a steep roof.
What it costs to hire
Professional solar cleaning runs $150–$400 per visit for a typical home, sometimes bundled with inspection. If cleaning is needed more than once or twice a year, something else (dust environment, birds) may be the real issue.
FAQ
Do solar panels need to be cleaned?
Usually not often — rain handles it, and unwashed panels lose only 2–5%. Clean after heavy pollen/dust or visible buildup.
Can I clean solar panels myself?
Yes, from the ground with a soft brush and water. Avoid harsh chemicals, pressure washers, and roof climbing — they risk damage and injury.
How much does professional solar cleaning cost?
About $150–$400 per visit for a typical home, sometimes with inspection bundled.
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Sources
- U.S. EIA — electricity rates by state, eia.gov/electricity/monthly
- NREL PVWatts v8 — solar production by location, pvwatts.nrel.gov
- DSIRE — state incentives and net metering, dsireusa.org
- See how every figure on this page is calculated — PVFig methodology.
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