Restore maximum output from your solar system — purified water cleaning that removes dust, pollen, salt haze, and bird droppings without leaving mineral residue on panel glass.
Solar adoption in Southwest Florida is accelerating rapidly — Florida ranks among the top states in the country for rooftop solar installations, and the Fort Myers and Naples area has seen significant residential installation growth in the past decade. But solar panels do not maintain their output on their own. In a climate with Gulf Coast salt air, high pollen counts in spring, bird populations around canals and waterways, and intense UV exposure year-round, panel glass surfaces accumulate fouling that measurably reduces energy production.
The science is straightforward: solar panels produce electricity in proportion to the amount of light reaching the photovoltaic cells. Anything on the panel surface that reduces light transmission — dust, pollen, bird droppings, salt haze, calcium deposits from tap water cleaning — reduces output. Research from NREL and the solar industry consistently shows 15% to 25% energy losses from moderately soiled panels. For a typical 10kW Southwest Florida solar system, that is 1,500 to 2,500 watts of lost capacity — not as a one-time event but as an ongoing daily reduction every hour the sun shines.
Rain Exterior Home Service provides professional solar panel cleaning throughout Fort Myers, Cape Coral, Naples, Bonita Springs, Estero, and surrounding communities. We use deionized purified water with a soft brush system — the same approach used by major solar farm maintenance contractors. Purified water leaves no mineral residue on panel glass when it evaporates, which is critical. Tap water cleaning deposits calcium and mineral films on the glass surface that hazen over multiple cleaning cycles and require aggressive treatment to remove. Professional purified water cleaning delivers a clean panel surface with maximum light transmission.
We work safely around live panels — solar panels generate DC voltage whenever light hits them, including cloudy days. Our technicians are trained in electrical safety protocols for roof-mounted panel work. After cleaning, we inspect and document panel and mounting hardware condition, noting any visible damage or issues for the homeowner's attention. Ask about combining solar panel cleaning with roof cleaning — both services access the same roof and can often be scheduled together.
Results
How It Works
We review the roof layout and panel configuration before accessing the roof. Water and power connections are confirmed safe before work begins.
Loose debris — leaves, palm fronds, bird droppings — is removed from panel surfaces and from around mounting brackets without dragging material across the glass.
Panels are washed with deionized or purified water using a soft brush head. Purified water leaves no mineral residue on the glass — the primary cause of haze after tap-water cleaning.
After cleaning, we inspect panel surfaces and frame condition and note any visible damage, loose mounting hardware, or physical issues for the homeowner's attention.
Common Questions
Studies from NREL and solar industry research consistently show that dirty solar panels lose 15% to 25% of their rated output under moderate soiling conditions. In Southwest Florida, where panels are exposed to Gulf Coast dust, pollen, bird droppings, and salt air, the efficiency loss on uncleaned panels can reach the higher end of that range. On a 10kW system, a 20% output reduction means 2kW of lost capacity — equivalent to paying for panels that are not producing what you paid for.
Most solar panels in the Fort Myers and Naples area benefit from professional cleaning twice a year — spring and fall. Spring cleaning removes the heavy pollen and winter dust buildup. Fall cleaning removes the debris and bird dropping accumulation from the summer. Homes with high bird activity or near canals with airborne organic material may benefit from three cleanings per year. Check your panels from the ground after any significant storm — debris accumulation after hurricanes and tropical systems should be addressed promptly.
Tap water in most of Southwest Florida contains minerals — calcium, magnesium, iron — that leave residue on panel glass when the water evaporates. This mineral film hazes the panel surface and reduces light transmission over multiple cleanings. Professional solar panel cleaning uses deionized or reverse-osmosis purified water that leaves no mineral residue. DIY tap water cleaning can clean obvious debris but builds up a mineral haze over time that reduces output more than the cleaning removes.
Yes. Roof access for solar panel cleaning carries the same fall hazards as any roof work. Solar panels also present an electrical risk — they generate DC voltage whenever light hits them, even on cloudy days. Professional solar panel cleaners are trained to work safely around live electrical systems and use grounded, insulated tools. We strongly recommend against homeowner DIY solar panel cleaning, both for safety and for the quality of the result.
No. Most solar panel manufacturers specify cleaning as a routine maintenance requirement and do not void warranties for professional cleaning that follows manufacturer guidelines. Using abrasive scrubbers, harsh chemicals, or high-pressure water can void some warranties — which is why professional soft-brush purified water cleaning is the correct method. Check your panel documentation for specific manufacturer cleaning guidance and confirm with your installer if you have questions.
What Homeowners Say
"After the summer, our panels had bird droppings and pollen all over them. Rain Exterior Home Service cleaned them with the purified water system and production went up noticeably the following day. Professional and efficient."
"I had no idea dirty panels made such a difference. They cleaned 28 panels and documented the condition of each one. Found one with a micro-crack I had not noticed. Very thorough service."
Serving Fort Myers, Cape Coral, Naples, Bonita Springs, and all of Southwest Florida. Most jobs quoted within 24 hours.
Rain Exterior Home Service
We Regularly Serve Homeowners in Southwest Florida: