Solar Panel Cleaning in Santa Cruz, CA

On the coast, usually yes. Salt film, pollen, dust and bird droppings block light, and rain moves the dirt to the bottom edge rather than removing it. If your panels haven’t been cleaned in a year or more and you’re within a few miles of the ocean, it’s almost certainly worth it. Check your monitoring app before and after.

Published soiling research reports losses from a few percent in clean, rainy climates to well over twenty percent in dusty, coastal or agricultural areas. Santa Cruz County has coastal salt in the north and field dust in the south, so local arrays tend toward the higher end, especially if they haven’t been cleaned in a year or more.

Not the way we do it. Manufacturers specify soft tools, purified water, no pressure washing, no harsh chemicals and no cleaning of hot panels. That is exactly our method. Check your own warranty terms, and if your installer has specific cleaning guidance, send it to us and we’ll follow it.

Water is fine if it’s pure and the panels are cool. We use deionized water and a soft brush, with no soap, detergent, vinegar or glass cleaner. Tap water leaves mineral spots as it dries, and cold water on hot glass can crack panels through thermal shock. Always check your panel maker’s cleaning instructions.

You can, but hose water leaves mineral spots and a hose won’t lift salt film, sap or bird droppings. Getting on a roof with a hose is also the most common way homeowners get hurt. If you want to DIY, do it from the ground with a soft brush on a pole and a deionized rinse.

Once or twice a year for most homes. Twice if you’re within a mile of the ocean, in the Watsonville ag belt, or have a low-tilt or ground-mount array. Once a year plus after any wildfire smoke event in the Santa Cruz Mountains.

Late spring after the pollen drop, and early fall before storm season. If you only do it once, do it in May or June so you get the clean panels through the long summer days.

Yes. Tile roofs are cleaned from the ground with poles wherever possible, because walking on tile breaks tile. Where roof access is needed, we use fall protection and walk only where the roof is designed to bear weight.

No. We clean glass and frames only. We’ll photograph and flag anything electrical that looks wrong, but the installer or an electrician handles it.

Yes, and most solar customers do. One crew, one trip, one invoice for everything above the eaves: panels, skylights, windows and gutters.

No. Panel makers specify no pressure, and we never use pressure washers on panels. Cleaning outside the maker’s instructions can affect your warranty. We clean with a soft brush on a water-fed pole and deionized water, and only when panels are cool, in the morning or on overcast days, so cold water never hits hot glass.

They cut output more than most dirt. A single dropping can shade a cell hard enough to trip the bypass diode, and droppings don’t rinse off in the rain. We soak stubborn droppings and lift them by hand, never scraping, then rinse with deionized water. Nests under an array are a separate problem we photograph and flag.