PerformanceUp to date · Jan 15, 2026
Soiling Loss
Energy production lost due to dirt, dust, pollen, bird droppings, or other debris accumulating on solar panel surfaces and blocking sunlight.
Why It Matters
In most U.S. climates, soiling causes 2-5% annual production loss. Regular rain provides natural cleaning, but arid regions (Arizona, California interior) may see 5-10% loss without washing.
Real-World Example
A dusty panel in Phoenix might lose 7% of output over summer. A single rain event typically restores most of the lost production.