How Dirty Solar Panels Reduce Energy Production

Every speck of dust, pollen or bird dropping on a solar panel blocks sunlight from reaching the photovoltaic cells underneath. Multiply that across hundreds of square feet of array and the losses add up fast.

The numbers

Independent studies and utility-data analysis put real-world losses between 5% and 25%. For a typical 6 kW South Bay system producing around 9,000 kWh per year, a 15% loss is about 1,350 kWh — well over $400/year at current LA-area rates.

Why South Bay panels get dirty fast

We have very little summer rain, plus marine-layer film, freeway dust, and bird activity along the coast. Panels rarely 'self-clean' adequately.

Cleaning pays for itself

A professional cleaning typically costs a fraction of the energy it recovers in a year. Schedule once or twice annually and you keep your investment producing.