Solar panel cleaning in San Francisco, California

Most San Francisco homeowners pay between $160–$340 for a professional cleaning, depending on panel count, roof pitch, and access.

Panel count first, then roof pitch and height, then access: a two-storey roof with a steep pitch costs more than a single-storey ranch or a ground mount. Heavy build-up, bird droppings under the array and add-ons such as bird proofing or an inspection raise the quote. The $160–$340 range quoted by San Francisco pros covers most single-family homes.

Local pros typically recommend cleaning 1–2 times a year in San Francisco. Build-up here is heaviest around Jul–Oct, so that is the stretch to plan around. Panels near agriculture, construction or heavy pollen need it more often.

Grime in San Francisco builds fastest around Jul–Oct. Pros usually suggest a cleaning just before that stretch, so the array goes into its heaviest season clean, and another once it ends. That fits the 1–2 times a year most local pros recommend. If you only book once, book it as Jul–Oct winds down.

The Bay Area is kinder to solar panels than the Central Valley or the desert, but it is not clean. In San Francisco itself and along the East Bay shoreline the summer fog leaves a daily film of salt and moisture that catches airborne dust and the soot from freeway traffic, and when the fog burns off the residue dries onto the glass. The full local picture, season by season, is in the "why it matters" section on this page.

12 solar panel cleaning pros serve San Francisco on CleanMySolarPanels. Each listing shows the services offered, reviews from completed jobs where we have them, and a free quote button.

The pros listed here serve Sunset District, Richmond District, Bernal Heights, Noe Valley, Excelsior, Bayview, Oakland, Berkeley, San Jose, Fremont, Walnut Creek, Concord, San Mateo and Santa Rosa. Most travel across the metro for a standard cleaning, and a few add a small trip charge for the outer suburbs, so say where you are when you request quotes.

Local pros list Window, gutter & exterior cleaning, Residential panel cleaning, Bird & pigeon proofing, Solar panel cleaning, Commercial panel cleaning, Inspection & diagnostics, Robotic solar cleaning, Maintenance plans, Repair, removal & reinstall, Solar farm & ground-mount cleaning, Roof washing, Skylight cleaning, Solar guard installation and Winery solar panel cleaning. Not every company offers every service, so each listing shows what that company does.

Yes. 7 of the 12 San Francisco pros listed here install bird proofing: a wire mesh clipped around the array edge so pigeons cannot nest underneath, where droppings and debris shade cells and can void the panel warranty. It is usually quoted per linear foot and done in the same visit as a cleaning.

6 San Francisco pros clean commercial arrays: flat roofs, carports, warehouses and ground mounts. Commercial work is normally priced per panel, scheduled around the site's hours, and often includes a production report before and after.

1 San Francisco pro offers a recurring plan, usually at a discount to one-off pricing. With local pros recommending 1–2 times a year, a plan removes the guesswork and keeps the array clean through the peak season. It pays off most for larger systems and for homes under trees or near open ground.

9 of the San Francisco pros listed here offer exterior cleaning alongside panels. Bundling the roofline into one visit usually costs less than booking two companies, and a clear gutter keeps leaf litter from washing back onto the lower panels.

7 of the 12 San Francisco pros listed here state that they carry liability insurance. Ask for the certificate before anyone goes on your roof; a reputable company sends it without fuss.

Not yet on this site: the San Francisco profiles listed here are unclaimed business records, and reviews appear once an owner claims a profile and completes jobs through quote requests. Check the company's own site and ask for recent local references.

Look for deionised-water equipment and soft brushes, liability insurance, and a clear per-visit price before anyone climbs a ladder. On this page, 0 San Francisco pros are verified and 7 state they are insured. Requesting quotes from two or three pros takes a minute and shows you the local price spread.

Nearby, we list pros in Sacramento, Fresno, Jacksonville, Los Angeles and Orange County. Many San Francisco companies travel to those areas too, and the nearby cities section at the bottom of this page links to each one.

A rinse with deionised or purified water, a soft-brush wash of every panel, a second rinse so no minerals dry on the glass, and a quick look at the frames, wiring and racking. Most pros photograph the array before and after. Bird proofing, gutter clearing and inspections are add-ons.

About one to two hours for a typical home array of 15 to 30 panels, longer for a steep two-storey roof or heavy build-up. Commercial arrays are priced and scheduled by panel count.

No, as long as it is done the way manufacturers specify: low pressure, purified water, soft brushes and no harsh chemicals. What voids warranties is pressure washing, abrasive pads, walking on the glass and bird nests left under the array.

Tap water carries minerals that dry into white spots and a thin film that cuts output. Deionised water leaves nothing behind, so the glass dries clear without a squeegee, and nothing needs to be added to it.

Yes. Soiling losses of 5–25% are documented in dusty regions (NREL research). Most homeowners see a measurable production bump the same day.

Rarely. Rain rinses loose dust but leaves pollen film, bird droppings and the mineral streaks that form as drops dry, and panels at a shallow tilt hold water at the bottom edge where grime collects. Rain helps between cleanings; it does not replace them.

No. Pressure washers can crack glass, force water past the frame seals and void the manufacturer's warranty. Pros use low-pressure deionised water and a soft brush.

For a routine wash, no: the array keeps producing and nothing electrical is touched. A pro shuts the system down only for repairs, bird-proofing under the array, or an inspection that opens a junction box.

Usually not. Pros work from the outside and need access to a hose tap and the roof. Most send before-and-after photos and a production reading when they finish, and bill online.

Winter is fine as long as the glass is above freezing. On hot days pros start early: cold water on hot glass can stress it, and water flashes off before it can rinse. Early morning and late afternoon are the usual slots in summer.

Ground-level and single-story panels can be a DIY job with a soft-bristle kit and deionized water. Anything higher is safer with an insured pro.

Describe your panels once, pick up to three San Francisco pros, and only those pros can call or text you about the request. There is no charge to homeowners and no obligation to book.