Solar Panel Cleaning
in San Diego
Salt, dust, pollen, and bird droppings quietly steal up to a quarter of your production. Our in-house crews restore it with a safe, streak-free soft-wash — and inspect your whole system while they're up there.
Why Do San Diego Solar Panels Lose Output?
San Diego's coastal air, long dry season, and minimal rainfall make this one of the worst climates in the country for solar soiling. Here's what builds up on your panels — and why a garden hose won't fix it.
Coastal Marine Layer & Salt
Homes in La Jolla, Del Mar, Carlsbad, and along the coast collect a salt and marine-layer film that bakes onto the glass. It cuts light transmission and won’t rinse off with a garden hose.
Rain Isn’t Enough
San Diego averages only ~10 inches of rain a year, almost all in winter. Light rain actually leaves behind a mineral residue as it dries — it does not clean panels, it dirties them.
Bird Droppings & Hot Spots
Droppings and debris fully block the cells underneath. That creates “hot spots” that drag down the whole string and, over time, can permanently damage panels.
Dust, Pollen & Wildfire Ash
Santa Ana winds, the dry season, and wildfire smoke layer fine dust, pollen, and ash across your array. In dry climates like ours, soiling losses commonly reach 15–25%.
NEM 3.0 Makes Every kWh Count
Under NEM 3.0, the value of your system comes from the energy you actually produce and use. Dirty panels quietly erase the savings you paid for — every clear day they’re underperforming.
Protect Your Warranty
Many panel manufacturers require regular cleaning and maintenance to keep the production warranty valid. A documented cleaning schedule protects both your output and your coverage.
Our 4-Step Solar Cleaning Process
More than a wash. Every visit includes a full safety and performance inspection by the same in-house team that has serviced San Diego roofs for 30 years.
Book Your Cleaning
Request a visit online or by phone. We’ll confirm your system size and roof type and schedule a time that works — most San Diego cleanings are booked within the same week.
System Inspection
Before we touch the glass, our technician inspects the array for cracked panels, loose racking, lifted flashing, exposed wiring, and signs of bird or rodent intrusion under the panels.
Deionized Soft-Wash
We clean with purified, deionized water and soft brushes — no harsh detergents and no abrasive pads that scratch the anti-reflective coating. The result is a streak-free, residue-free finish.
Performance Report
You get a simple before-and-after summary plus any inspection findings, so you know exactly what we did and whether anything needs attention from our service team.
Panels looking hazy or production dropping?
Book a deionized soft-wash and full system inspection with the crew San Diego has trusted for 30 years.
Transparent Solar Cleaning Pricing
Flat, upfront pricing with no surprise add-ons. We confirm your exact quote based on system size and roof access before we start.
Single-Story Residential
Most San Diego homes. Soft-wash cleaning plus a visual system inspection.
- Up to ~20 panels
- Deionized water soft-wash
- Visual array & racking inspection
- Before/after performance check
Two-Story & Large Systems
Larger arrays and harder-to-reach roofs that require fall-protection and extra access equipment.
- Up to ~40 panels
- Harness & fall-protection access
- Full soft-wash + inspection
- Detailed performance report
Annual Maintenance Plan
Set-and-forget protection that keeps your panels producing and your warranty intact year-round.
- 2 scheduled cleanings per year
- Priority booking
- Production monitoring check-in
- Discounted repairs if needed
Ask about bird & critter mesh guards, inverter checks, and multi-home / HOA community pricing.
Cleaning Done by Solar Professionals
A window-cleaning service can rinse your glass. They can't tell you that a bypass diode has failed, that your racking is lifting, or that rodents have chewed the wiring under your array. We can — because we've designed, installed, and repaired solar in San Diego for 30 years.
Where Do We Clean Solar Panels Across San Diego County?
From coastal salt-air homes to inland estates, we service every roof type, microclimate, and HOA requirement in the county.
What Do Cleaning Customers Say?
“San Diego Solar goes above and beyond to make sure a quality solar solution is installed — starting with the owner Dirk Hosmer, who personally oversees and works on my entire project.”
Brady Bishop
Google review · 2015
“It's been a great experience working with Dirk and Tonya. They are both extremely knowledgeable about solar energy and have always been quick to return a phone call or email. I would strongly recommend working with these guys.”
Dustin Brown
Google review · 2015
“Brad and Dirk are the kind of pros that make San Diego a great place. Friendly, know their craft well, not flashy. Went so well I worked with them to expand the original system later on.”
Brian K.
Google review · 2026
Common Questions About Solar Panel Cleaning in San Diego
Professional solar panel cleaning in San Diego typically starts around $179 for a standard single-story home (up to about 20 panels) and around $299 for larger or two-story systems that require fall protection. Annual maintenance plans with two cleanings and an inspection start around $299 per year. Final pricing depends on your system size, roof height, pitch, and access. We confirm the exact price before any work begins.
For most San Diego homes we recommend professional cleaning twice a year — typically once after the spring pollen season and once at the end of the dry season before winter. Coastal homes (La Jolla, Del Mar, Carlsbad) with heavy salt and marine-layer buildup, and homes near trees or with frequent bird activity, often benefit from more frequent service.
Yes. In dry, low-rainfall climates like San Diego, soiling losses commonly reach 15–25%, and localized bird droppings can knock out an entire panel string. Because rain here is infrequent and leaves mineral residue, dirt accumulates and stays. Removing it restores light transmission to the cells, which is why many homeowners see a measurable production jump on the first clear day after cleaning.
They can. Many solar panel manufacturers require regular cleaning and maintenance to keep the production warranty valid, and heavy soiling that causes hot spots can lead to damage that isn’t covered. Keeping a documented cleaning schedule protects both your energy output and your manufacturer warranty.
Absolutely. We clean and service any solar system in San Diego County regardless of who installed it. With 30 years of experience, our technicians know virtually every panel, racking, and inverter type in the region, and we frequently find and flag issues that previous installers missed.
We don’t recommend it. Walking a roof is a fall risk, tap water leaves mineral spots, and pressure washers or abrasive pads can crack panels or scratch the anti-reflective coating and void your warranty. Our crews use purified deionized water, soft brushes, and proper fall protection, and we inspect the electrical components while we’re up there.
We use a deionized (purified) water soft-wash system with soft brushes — no harsh chemicals and no high-pressure spray. Deionized water dries without leaving spots or residue, so the glass stays streak-free, and the soft-wash approach protects the panel coating and seals. We never use abrasive tools that could damage the array.
We provide solar panel cleaning and maintenance across San Diego County, including La Jolla, Del Mar, Rancho Santa Fe, Carlsbad, Encinitas, Oceanside, Solana Beach, Carmel Valley, Point Loma, Poway, Coronado, and surrounding communities.
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