Solar panel cleaning across the San Fernando Valley.

With purified water and a soft brush, and nothing else. The reason purified water matters is that it carries no dissolved minerals, so it dries without leaving the spotting that ordinary tap water leaves behind. Where an array can be reached safely from the ground we work from the ground, which is better for your landscaping and safer for our crew. Where it cannot, our technicians are trained and insured for roof work.

It is what happens before anyone quotes you a price. We work through four steps on the roof, in the same order every time, covering the system itself, the contamination on it, the bird activity under it, and the written report at the end. It usually takes twenty to thirty minutes on a residential array, it costs nothing, and you are under no obligation afterward. The result is photographs, a Solar Care Grade, your options, and a final project price. It is a visual assessment, not an electrical, roofing, wildlife, or engineering inspection.

A simple A-to-F description of the condition your array is in when we arrive, so the recommendation is not just our word against your eyes. Grade A is clean and protected; B is light contamination; C means cleaning is recommended; D means heavy contamination or bird activity; F means severe buildup, nesting, or that protection is strongly recommended. It grades what we can see on and around the panels. It is not a performance, electrical, production, or system-health grade.

Because the space under a panel is one of the few genuinely sheltered spots on a house that nothing ever disturbs. Pigeons are the usual occupants in our area, and they return to a site that has worked before, which is why the problem tends to come back rather than pass. The other reason we get asked this is timing: homeowners almost always notice in spring, when a site that was occupied quietly all winter suddenly gets noisy.

Four valleys across Los Angeles and Ventura Counties. Santa Clarita Valley: Santa Clarita, Valencia, Saugus, Newhall, Canyon Country, Stevenson Ranch, and Castaic. San Fernando Valley: Porter Ranch, Northridge, Granada Hills, Chatsworth, West Hills, Woodland Hills, Encino, Sherman Oaks, Tarzana, Studio City, Valley Village, and North Hollywood. Conejo Valley: Thousand Oaks, Agoura Hills, Westlake Village, Calabasas, Simi Valley, and Moorpark. Antelope Valley: Palmdale, Lancaster, and Quartz Hill. If you are nearby and do not see your city listed, just ask. We will confirm the same day.