Panels covered in pollen, salt, or bird droppings: what it costs you

Soiling is real but usually oversold. A light dust film costs very little and the next rain deals with it, but a baked salt film, a heavy spring pollen layer, and bird droppings under the palms all cost measurable production and none of them wash off in a Southwest Florida shower. Cleaning is $10 to $20 per panel with a $150 to $250 minimum, and an inspection with a written production report is $200 to $400. Buy the report first if you are not sure; it tells you whether the cleaning pays for itself.

Check this first

1. Look at the app before you look at the roof. Compare this month to the same month a year ago, not to last month. A gentle decline across every panel points at soiling. One panel flat at zero is not dirt; that is the one panel dark problem.
2. Zoom in on the array from the ground. A phone camera at full zoom shows a pollen film, a chalky salt haze, and bird droppings clearly. Photograph it in morning light when the glare is low.
3. Note what is above and around the array. Palms, an oak, a screened cage, a dryer or kitchen vent, or a neighbor’s construction dust all change the answer. So does a nearby roof that was recently torn off.

That is the safe list. Do not walk the array to inspect it.

What is usually wrong

Numbers come from the pricing page, and the work is on the cleaning and inspection page.

What actually drives soiling here

Salt. Cape Coral has hundreds of miles of canals, and Pine Island, Fort Myers Beach, and the Gulf-side communities sit in salt aerosol year round. Salt film is the one type of soiling that genuinely does not rinse off in rain, because it redeposits as the water evaporates. Coastal arrays here need cleaning more often than inland arrays in Lehigh Acres or Alva do.

Pollen season. Spring loads everything in Southwest Florida with a yellow film, and a rooftop array at a shallow tilt holds it rather than shedding it.

Birds and palms. Palms and pines beside a roof give birds a perch directly above the array, and the droppings that follow are opaque rather than translucent. This is the most common local complaint, and it is also the one where cleaning shows the biggest before and after difference.

Wet season rain is not a wash cycle. Afternoon storms from June to September rinse dust and then leave mineral spotting behind as they dry in the heat. Owners often assume the rain is doing the job. On a canal-front roof it is not.

When cleaning is not the answer

Soiling is gradual. If your production fell off a cliff on a specific date, the glass is not the reason and cleaning it will not fix it: read the production dropped or inverter red light pages instead. Likewise, a panel that reads zero all day every day is electronics, not dirt.

The other honest limit: nobody should sell you a cleaning subscription in this market. Coastal arrays here benefit from a look once a year, inland arrays less often, and the production report is what settles the interval on your roof rather than a schedule someone made up.

What to expect on the call

Send the zoomed ground photo of the array and a screenshot of the last twelve months of production if the app has it. If the panels are genuinely soiled, you get a per-panel price against the published minimum and a same-visit production reading before and after so you can see what you bought. If the glass is clean and the loss is somewhere else, you get told that instead, and the visit becomes a diagnostic at $150 to $350 rather than a cleaning you did not need. If your roof is due for replacement anyway, every panel comes off during a detach and reset and gets cleaned and inspected on the ground as part of that job.