Solar Panel Cleaning/Bozeman, Montana
Panels only pay when light reaches them.
Deionized water and soft brushes on roof-mount and ground-mount arrays. No detergents, no abrasives, nothing left on the glass that attracts the next round of dust.
What’s included
- Roof-mount and ground-mount arrays
- Deionized water rinse, no detergent residue
- Soft-bristle brushes rated for panel glass
- Visual check for cracked glass or lifted seals
- Frame and rail debris clearing
- Note on any shading that has grown in since install
- Photos of the array before and after on request
- No walking on panels, ever
How we do it
- Cold panels onlyWe clean early morning or on an overcast day. Cold water on sun-hot panel glass risks thermal shock, and a hot array is unsafe to work near.
- Dry debris firstPine needles, cottonwood fluff and dust get cleared before any water, so grit does not get dragged across the glass.
- Pure water, soft brushDeionized water carries nothing that can dry into a deposit. That is the whole reason it works — the panels dry spot-free with no detergent film left behind to catch the next layer of dust.
- Inspect while we are up thereWe flag cracked glass, delamination, lifted seals, corroded clamps or anything chewed. We are not electricians and will not touch wiring — we just tell you what we saw.
Why arrays here need it more than the brochure says
Panel manufacturers like to say rain handles it. In the Gallatin Valley that is optimistic, for three reasons.
Wildfire smoke. Late-summer smoke deposits a fine, oily particulate that is genuinely hard to rinse off and does not clear with one rainfall. Post-smoke is the single highest-value time of year to clean an array here.
Spring pollen and ag dust. Cottonwood and grass pollen in late spring, and field dust through harvest, both stick to panel glass and both arrive in the months with the most sunlight to lose.
Low winter sun angle. Steeply-tilted winter installs shed snow reasonably well but sit at an angle where any surface film costs proportionally more. Dust that barely matters in June matters in November.
Cleaning does restore output that soiling has cost you — but how much depends entirely on how dirty the array was, and anybody quoting you a specific percentage gain before looking at your panels is guessing.
What we do not do
We do not walk on panels, use pressure washers on them, use abrasive pads, or apply any detergent or coating. All of those void most panel warranties, and the coatings in particular tend to make the next cleaning harder.
We also do not touch wiring, inverters, combiner boxes or rail hardware. If something up there looks wrong, we photograph it and tell you, and you call your solar installer.
What drives the price
We quote every property individually rather than publishing a flat rate, because these six things change the number more than anything else. Nothing on your invoice will differ from the written quote.
- Panel countThe main driver. A 20-panel residential roof array and a 60-panel ground mount are different jobs.
- Roof or ground mountGround mounts are faster and cheaper. Roof arrays depend on pitch and access.
- Roof pitch & heightSteep or high roofs need more setup and sometimes fall protection.
- Soiling levelA yearly clean is quick. Three years of smoke and pollen takes two passes.
- Access to waterWe bring purified water, but a spigot on site keeps the job shorter.
- FrequencyOnce or twice a year suits most arrays here — after pollen, and after smoke clears.
Common questions
How much output does cleaning actually restore?
It depends entirely on how soiled the array was, so we will not quote you a number before seeing it. Lightly dusty panels gain very little. Panels carrying a season of smoke film gain noticeably more. If you monitor production, compare the week before against the week after and you will have your own real answer.
Will rain clean them for me?
Partly, and less than you would hope. Rain rinses loose dust but does a poor job on smoke film and pollen, and it can leave its own spots as it evaporates off dirty glass.
When is the best time to clean?
Late spring after pollen drops, and early fall once smoke season ends. If you only do it once a year, do it after the smoke clears.
Does this void my panel warranty?
Deionized water and soft brushes are the method most manufacturers specify, so no. Pressure washing, abrasives and detergents are what cause warranty problems, and we use none of them.
Often booked together
Free quote/No obligation
Tell us what needs cleaning.
Most quotes go back out within one business day. If it’s an ice dam, call instead — (406) 404-9963.