Why the Southern California climate is hard on panels
Solar panels depend on sunlight reaching the cells, and anything on the glass gets in the way. In wetter climates, regular rain rinses panels between cleanings.
Southern California is different. Los Angeles and the San Gabriel Valley go through long dry stretches with little to no rain, so there is nothing to wash away the dust, pollen, and grime that settle during the summer. That buildup just keeps accumulating.
What dirty panels cost you
A film of dust and grime reduces the amount of sunlight the panels can convert, which means less electricity and a smaller dent in your utility bill.
Bird droppings are worse because they fully block the cells they cover and are stubborn to remove once baked on. Over a long dry summer, the loss from dirty panels adds up right when you are running air conditioning and want the most from your system.
How often to clean panels here
For most homes in the region, one to two cleanings a year keeps panels producing well. Certain conditions call for more frequent service.
- Homes under trees with heavy pollen, sap, or bird activity
- Properties near open dust, construction, or dry hillsides
- Systems on low pitch roofs where debris does not slide off
- After long dry spells with no rain to rinse the panels
How we clean panels safely
We clean panels with purified, deionized water so they dry spot free with no mineral film on the glass. Purified water rinses residue away without harsh chemicals or abrasive tools that could scratch a panel or void a warranty.
For a firm price on your array, request a free instant quote or call (626) 593-8437. We clean solar panels across Los Angeles, Pasadena, and the San Gabriel Valley.
Related services
Ready to book, or want an exact figure? Explore the services in this guide:
Related reading
Keep reading on closely related topics: