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Proven Performance Loss From Dirt, Pollen & Grime
- Nationwide monitoring shows 2.8%–7.2% annual loss even on maintained systems
- Unmaintained systems lose 12%–25% of their yearly production
- High‑soiling regions see 15%–35% loss
- After heavy pollen or dust events, output can drop 40%–60% until cleaned
What Engineering Research Shows
- Dust, pollen, and pollution block sunlight and reduce efficiency
- Even thin layers of particulates cause measurable output loss
- Cleaning is considered essential maintenance for PV systems
Bottom line: Clean solar panels produce more power — typically 12% to 35% more, with an average gain around 25%.
Do Solar Panels Really Need to Be Cleaned?
Independent data shows that dirty panels lose measurable power — and cleaning restores it.
Residential & Commercial Study Results
- 25% average power increase after cleaning
- Consistent gains across all roof types
- Strong ROI for annual or semi‑annual cleanings
Based on published testing and field data from the National Renewable Energy Laboratory (NREL) and other independent solar performance studies.
Environmental Factors That Reduce Output
- Dust, Pollen, and Air pollution
- Bird droppings and Organic debris
These accumulate faster in Vermont during spring pollen spikes and after winter grime.
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