Integrity Pro Washers Team
Professional pressure washing and soft washing specialists serving San Diego County.
Last updated: 2026-04-22
Is solar panel cleaning worth it in San Diego?
For most San Diego homeowners, solar panel cleaning is worth it every 12 to 18 months. Coastal homes and those under jacarandas or pines recover 8 to 15 percent of lost output after a cleaning. Homes with clean sightlines and flat roofs often recover 3 percent or less. Cost runs $12 to $18 per panel.
Last updated: April 2026
What we actually see on the roof
We cleaned a 22-panel array in Kensington last month. The owner had not touched it in four years. Output the day before we arrived: 4.1 kWh during the 1 pm production peak. Output two days after cleaning: 4.8 kWh at the same time slot with comparable cloud cover. That is a 17 percent jump on a system that was not visibly filthy from the ground.
Then we cleaned a newer array in Scripps Ranch two weeks later. Three-year-old panels, open lot, no trees within 60 feet. Output difference after cleaning: under 2 percent. The owner paid $264 to recover maybe $40 of annual production.
Both jobs were legitimate. Neither homeowner was wrong to call us. The variable is what is actually landing on the glass.
When cleaning is worth the money
If your house checks any of these, a cleaning pays back fast.
- You live within two miles of the coast. Salt mist from Ocean Beach through Cardiff leaves a film that etches into panels over a year or two.
- Trees drop on your roof. Jacaranda blossoms in North Park, pine pollen in Rancho Bernardo, eucalyptus debris in La Mesa. All of it cooks into sticky residue.
- You have a tile roof. Tile roofs shed dust differently than composite shingles and that dust ends up on the panel edges.
- There is a freeway within a quarter mile. Brake dust travels and it is conductive.
- You have not had a cleaning in 18 months or more.
When it is not worth the money
We will tell homeowners this on the phone. If your panels are less than two years old, you have no tree cover, you are inland with good prevailing wind, and you have had rain in the last six weeks, your output loss is probably under 3 percent. Math: on a 20-panel residential system producing around 9,000 kWh a year in San Diego, 3 percent is 270 kWh. At SDG&E rates that is maybe $90 in recovered annual production. A cleaning at $14 per panel is $280. You will not break even that year.
What does a solar panel cleaning cost in San Diego?
Our pricing runs $12 to $18 per panel depending on roof pitch, access, and how bad the soiling is. A standard 20-panel residential array on a single-story home with a pitched composite roof usually lands at $280 to $340. Two-story jobs and steep tile roofs cost more because we use fall protection and take longer on each row.
We do not use hoses from the ground on tile roofs. Pressurized water blown uphill under tile lifts the felt and causes leaks six months later. We use deionized water, soft brushes, and telescoping poles. Deionized water means no mineral spots when it dries, which matters because we are not coming back to towel off 24 panels.
Pressure washing vs professional solar panel cleaning
| Method | Pressure (PSI) | Risk to seals | Typical cost |
|---|---|---|---|
| Homeowner hose | 40-60 | Low but ineffective | $0 |
| Homeowner pressure washer | 1500-3000 | High - voids most warranties | $0 plus possible damage |
| Professional DI water and soft brush | 40 or less | None | $280-$340 for 20 panels |
How often we recommend it
Coastal customers: every 12 months. Inland customers with tree cover: every 12 to 18 months. Inland customers with no tree cover: every 24 months is fine. We schedule a lot of our solar cleanings right after marine layer season ends, usually late June through July. That way the panels are clean through the high-production summer months.
We also clean panels on a schedule we walk through here if you want the full breakdown. Our services page lists what is included in each visit.
What to ask before you book
Ask whoever you call these three things. Do you use deionized water. Do you walk the roof or stay on a ladder. What is your insurance limit for a fall through the roof. If they fumble any of the three, call someone else. We have walked off jobs where the homeowner had already been quoted by a crew using tap water and a pressure wand. That quote was cheaper for a reason.
If you are in San Diego County and want an honest take on whether your array actually needs a cleaning this year, we will look at your production data before we send a quote.