THE SHORT ANSWER
Do not assume every array needs scheduled washing. Inspect safely from the ground, compare production evidence and follow equipment and roof guidance before choosing a cleaning method.
Identify a real condition
Look for localized bird droppings, pollen bands, leaves or construction dust from a safe vantage point. Note whether residue covers one module or the array. A general statement that Florida is dusty is not evidence that roof access or cleaning will improve this system.
Compare production without overpromising
Use similar clear days and the same season where possible. Check for monitoring gaps or equipment alerts first. DOE’s homeowner guidance treats system performance as dependent on site and design conditions. [1] Weather-normalized analysis is stronger than comparing one rainy week with one sunny week.
Read product and roof instructions
Find module cleaning limits, prohibited chemicals, pressure guidance and safe temperature conditions in the manufacturer documentation. Also consider roof-warranty and access requirements. Federal warranty guidance emphasizes written terms and may allow exclusions for damage caused by misuse or improper maintenance. [2]
Avoid unsafe homeowner access
Do not climb a wet, steep or tile roof to save a service call. Keep ladders, poles and water away from overhead electrical hazards. A qualified provider should define fall protection, access route and whether inspection can be completed without walking sensitive roof areas.
Record the outcome
Photograph the condition before and after, note the method and products used, and compare later production cautiously. If the suspected loss remains, move to electrical and communications diagnostics rather than repeating cleaning because it is the easiest visible explanation.
Before your next conversation
- Document actual residue from the ground.
- Compare appropriate production periods.
- Read module and roof instructions.
- Record method and outcome.
Primary sources
- U.S. Department of Energy: Homeowner’s Guide to Going Solar
Primary source checked September 10, 2026. Confirm current legal, lender, permit, product and property-specific requirements before acting.
- Federal Trade Commission: Businessperson’s Guide to Federal Warranty Law
Primary source checked September 10, 2026. Confirm current legal, lender, permit, product and property-specific requirements before acting.
Planning examples and questions are Origin’s editorial guidance, not a property-specific diagnosis, engineering design, tax determination or promise of savings. Manufacturer and utility references do not imply an affiliation with Origin.
Need help with the system you already have?
Request a maintenance assessment when cleaning need or safe access is uncertain.
Request solar service →Equipment support, diagnostic fees, availability and accepted work are confirmed before service. A request is not a confirmed appointment.