EXTERIOR · SOLAR PANELS
SOLAR PANEL CLEANING
The Gold Standard, Every Time.
A film of pollen and bird droppings can cut panel output 15–25%. We clean with deionized water and soft-bristle fed-poles — no detergent residue, no scratched glass.
Get A Free EstimateOur Process
How We Deliver The Gold Standard
Panel Inspection
Visually check for micro-fracture, loose mounting, and hot-spot patterns before water touches glass.
Deionized Rinse
Fed-pole delivery of pure water — leaves zero dissolved solids and no water-spot residue when it dries.
Soft-Brush Agitation
Roller brush matched to panel coating. Bird droppings and pollen lifted without abrading the anti-reflective layer.
Final Rinse & Doc
Second DI rinse, then we photo-document condition and note anything the installer should look at.
Real Work, Real Results
Before & After
Questions & Answers
Frequently Asked
Will cleaning my panels void the warranty?
No — when done with deionized water and soft-brush. That's why we use it.
How much output will I recover?
Studies show 15–25% recovery on dirty panels in pollen-heavy regions like NE Florida.
How often should I clean them?
Twice a year in NE Florida — once after pollen season and once after summer storm season.
NE Florida Solar Panel Intelligence
The Efficiency Math, Coastal Challenges & Correct Process
Solar panels in Northeast Florida face a combination of biological and mineral soiling that most manufacturer maintenance guides — written for drier climates — do not fully account for. Understanding the specific failure modes here determines how to clean correctly and when the return on investment is most favorable.
The Efficiency Math: What Dirty Panels Actually Cost
Pollen and biological film reduce solar output by 15 to 25 percent within six to twelve months in NE Florida's pollen environment. For a 10 kW system generating approximately $2,400 per year in utility savings, a 20 percent reduction represents $480 per year in lost efficiency — every year the panels remain unclean.
Annual professional cleaning costs a fraction of that recovered value. The payback is not theoretical: it is the difference between a system running at design capacity and one running at the output of a smaller, cheaper system because the glass is occluded. Homeowners who track their inverter output data can see the efficiency drop begin in April when oak pollen peaks and continue through June as pine pollen settles.
The NE Florida Pollen Problem
Pine and oak pollen in Northeast Florida creates a sticky resin layer on panel glass that rainfall does not remove. Unlike dust, which is loosely bound and washes off in moderate rain, pollen resin bonds to the glass surface through a combination of moisture and UV exposure. Once cured, it creates a diffuse film that scatters light before it reaches the photovoltaic cells, reducing output across the entire panel face rather than in isolated spots.
Oak pollen arrives in March and peaks in April. Pine pollen overlaps, running April through June. The combination deposits resin on panels installed at any pitch angle — including the steeper pitches that homeowners sometimes believe will self-clean in rain. They do not self-clean from resin. Only mechanical removal does.
Coastal Properties: Salt Film & Calcium Deposits
Properties within five miles of the coast — Ponte Vedra Beach, Atlantic Beach, Fernandina Beach — receive year-round salt air deposits that create a calcium-sodium film on panel glass. This film does not reduce output as dramatically as pollen in the short term, but it is more resistant to removal. Standard tap water rinse leaves behind mineral residue as it evaporates — the classic water-spot pattern that is visible from the ground after a cleaning that used tap water rather than treated water.
The correct solution is a reverse-osmosis deionized (RO/DI) water system, which produces water with effectively zero dissolved solids. When RO/DI water evaporates from panel glass, it leaves nothing behind — no mineral film, no water spots, no residue that blocks light. This is the same pure-water system we use for window cleaning, and it is the manufacturer-aligned specification for solar panel cleaning from SunPower, Tesla, and Enphase.
Thermal Shock: When Not to Clean
Solar panels operate at elevated temperatures during peak sun hours — a panel in full Florida sun can reach 140 to 160 degrees Fahrenheit on the glass surface. Applying cold water to a panel at that temperature creates a thermal gradient across the tempered glass that, in older panels or those with micro-fractures in the cell strings, can extend existing damage or create new stress fractures.
The correct cleaning window is early morning before panels reach operating temperature, or evening after the system has cooled below 100 degrees. We schedule all solar panel cleaning for morning hours. Homeowners who have previously had panels cleaned by general pressure-washing contractors at midday should ask their installer to run a thermal imaging inspection — thermal shock damage is detectable before it becomes a panel-level failure.
What Manufacturer Guidelines Actually Say
SunPower, Tesla Solar (formerly SolarCity), and Enphase all publish cleaning specifications in their product documentation. The consistent requirements across brands are: soft-bristle brush or non-abrasive pad only, no metal implements, no high-pressure spray on the panel face, and purified or deionized water for the final rinse. Some manufacturers explicitly prohibit cleaning with untreated tap water on coastal installations due to mineral deposit risk.
Failure to follow manufacturer-specified cleaning methods can void product warranty coverage on the glass and anti-reflective coating — the same components most likely to show degradation from improper cleaning. FCPE's RO/DI fed-pole process meets or exceeds every major manufacturer's published specification.
Ready When You Are
Book Your Solar Panel Cleaning Quote
St. Johns, Duval, and Nassau counties. Same-day callback if you reach us before 5pm weekdays.
Prefer to submit online? Our estimate form takes 60 seconds and you’ll get a same-day response.
Start My Free EstimateOr call (904) 466-1622
Exterior Vetting
What to ask your exterior cleaning contractor
Exterior cleaning around Northeast Florida homes requires the right method for each surface, not one pressure setting for everything.
When do you soft wash versus pressure wash?
Siding, stucco, painted trim, screens, and roofs need soft washing. Concrete and some hardscape can handle controlled pressure when the operator knows the surface.
How do you protect plants, pools, and runoff paths?
Ask about pre-wetting, controlled application, rinsing, and water movement around landscaping, pool decks, and drainage areas.
What chemistry do you use for organic growth?
The answer should be specific to algae, mildew, tannins, rust, or irrigation staining. One generic cleaner is not a property-care system.
Are the exterior specialists trained only for exterior scope?
FCPE keeps exterior discipline separate so the tools, chemistry, safety expectations, and surface knowledge stay focused.
Do you document the finished work?
Before and after photos, scope notes, and surface observations create accountability after the truck leaves.
