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If the pitch starts at your door and ends with "sign tonight for the special," sleep on it. The sun will still be there tomorrow; so will we.
Fast, Reliable Solar Panel Cleaning Across Cotati
Solar panel cleaning in Cotati typically runs $150 to $280 for most single-story homes, and we can usually have a crew at your door within 48 hours when the marine layer has left its mark. That fog the Petaluma Gap pushes through town every summer morning doesn’t just cool the air; it settles on your panels as condensation, mixes with dust off Highway 101, and bakes into a film that starts cutting into your production. We know exactly how that works here because we’ve been wiping it off Cotati roofs long enough to recognize which neighborhoods get hit hardest. If you want someone who won’t try to upsell you a whole new system when all you need is a good cleaning, call (877) 550-6892 and we’ll give you an honest number over the phone.
Why Gus’s Solar Is Cotati’s Preferred Solar Panel Cleaning Company
Gus Petrakis put his own name on the truck back in 2011, and that’s the same truck you’ll see parked on East Cotati Avenue or over near the plaza when our crew is working a job. People in Cotati call us because we answer the phone like a neighbor, not a call center. A live person picks up, day or night, and that’s unusual enough in this business that folks mention it before they mention the actual cleaning. When you’ve already been burned by a national outfit that quoted one number on the phone and a different one at the door, that matters.
We don’t subcontract. The team that shows up in your driveway is background-checked, uniformed, and works for Gus directly. You’ll see the same faces if you call us back for maintenance two years later. That’s the whole point of our Solar Panel Cleaning approach: show up on time, do what we said we’d do, charge what we said we’d charge. No pressure, no “sign tonight and save” routine. Gus would rather you take two weeks to think it over. The price will be the same.
Our Solar Panel Cleaning Services in Cotati
Residential Panel Cleaning
For the 1960s-to-1980s tract homes that make up most of Cotati’s housing stock, we clean panels by hand with soft brushes and deionized water. No pressure washers, no harsh chemicals, nothing that risks voiding your panel warranty. A typical single-story home on a standard lot takes our crew about 90 minutes from setup to final inspection. We’ll walk you through the before-and-after production numbers if you want to see them.

Commercial Array Cleaning
Cotati has a modest commercial footprint along Redwood Drive and near the 101 corridor, and those flat-roof arrays collect a different kind of grime than residential panels. Flat commercial panels puddle water in the morning fog, and that standing moisture attracts dust and pollen on every foggy June morning. We schedule commercial cleanings on a quarterly or biannual basis so your production stays predictable, and we work around your business hours so we’re not blocking parking when your customers arrive.

Bird & Critter Guard Installation
Pigeons and squirrels love the space under a solar array, especially in the older neighborhoods around downtown where mature oaks provide cover. Birds nesting under panels bring droppings, feather debris, and chewed wiring, which is a problem no cleaning alone will solve. We install critter guards that seal the gap between your panels and your roof, and we’ve been doing it long enough to know which guard styles hold up against Cotati’s particular bird pressure. Our team handles EV Charger Installation in Cotati too, in case you’re thinking about adding a charger while we’re already on-site.

Debris & Soiling Removal
Between the fog, the spring pollen from Cotati’s oak and walnut trees, and the fine dust that blows off the fields east of town, panels here collect a specific kind of film that you don’t see in drier inland cities. We use deionized water that dries spot-free, which matters in Cotati because the morning marine layer would otherwise leave mineral streaks on panels cleaned with ordinary tap water. After every cleaning, we check the array wiring and report any loose connections we find, because a cleaning visit shouldn’t just make your panels shiny; it should catch small problems before they become big ones.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Cotati
We service and clean panels from every major manufacturer, and we work regularly with Enphase microinverters, SolarEdge optimizers, and Tesla powerwalls on Cotati rooftops. Because we’re already in Sonoma County every week, we don’t have to order in every bracket, clip, or connector from a warehouse across the state; we stock what we need in our own trucks. That means if we spot a failing microinverter or a loose MC4 connection during a cleaning, we can usually fix it on the spot instead of scheduling a return trip. Gus’s crew is also your local resource for Solar Panel Maintenance & Monitoring in Cotati, so you’ve got someone watching your production year-round if you want it.
Common Solar Panel Cleaning Problems We See in Cotati Homes
- Marine-layer film buildup: The Petaluma Gap pushes moist air through Cotati nearly every summer morning, and the condensation it leaves on panels acts like flypaper for dust and pollen. After a few weeks of fog cycles, you’ll see a measurable drop in output even if the panels look clean at a glance.
- Bird activity on aging roofs: Many Cotati homes date from the 1960s and 1970s, and their composition shingle roofs have gaps that birds exploit for nesting. Panels installed on those roofs often become bird hotels without proper guards, and the mess under the array is worse than anything on top.
- Pollen and sap from established tree canopy: Neighborhoods around the downtown plaza and along West Sierra Avenue have old oaks and maples that drop pollen in spring and sticky sap in fall. That combination bonds to panels when the fog rolls in, and it won’t rinse off with a garden hose.
- Confusing roofline orientation: Cotati’s hexagonal street grid radiates from the downtown plaza, which means plenty of homes sit at odd angles to the compass. We pull out a compass on every site walk because a panel that’s shaded by an unexpected roofline angle will underproduce even after it’s perfectly clean.
Pricing for Solar Panel Cleaning in Cotati, CA
A standard residential panel cleaning in Cotati runs $150 to $280 depending on roof height, panel count, and how long the array has gone uncleaned. Small bungalow systems with 10 to 14 panels usually land around $175, while larger two-story homes with 25 to 35 panels might reach $280. Critter guard installation adds $8 to $14 per linear foot of array perimeter, and most Cotati homes need between 40 and 70 feet. If you’ve got a bigger commercial array, we quote by square footage after a quick site look. Every estimate is free, the price we quote is the price you pay, and there’s no trip charge inside our own county. Call (877) 550-6892 and we’ll give you a real number off your roof’s actual dimensions, not a brochure range.
We Also Serve Cities Near Cotati
Our crew drives into Cotati weekly, so if you live just over the line we can usually bundle your visit with another job nearby and save you time. We clean panels across Rohnert Park, Roseland, Petaluma, and Santa Rosa with the same flat pricing and the same crew. If you’re not sure which side of the city line you fall on, call (877) 550-6892 and we’ll tell you straight whether we can get to you this week. We also offer full Solar Panel Cleaning in Cotati service to homeowners in the 94931 zip code regardless of how far from the plaza you sit.
Serving Cotati, CA - Our Local Coverage Area
We’re based in the Cotati area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Solar Panel Cleaning in Cotati
We can usually have a crew in Cotati within 48 hours of your call, and often same-day if you’re flexible on the time window and the fog hasn’t pushed everything into the afternoon. Because we’re already running jobs in Sonoma County most weeks, Cotati addresses fall naturally onto our schedule without the long lead times you get from companies that drive up from the East Bay. Call (877) 550-6892 and we’ll give you a real arrival window.
Yes, we cover the entire 94931 zip code, from the homes around downtown within the hexagonal street grid to the older tracts off East Cotati Avenue and the newer builds further out. Cotati is compact enough that no address is more than ten minutes from another, so we don’t have minimum job sizes or awkward service boundaries.
If a storm has dumped dirt, sap, or leaf debris on your panels and you need it cleaned before a forecasted stretch of production weather, we prioritize storm-response cleanings. Call (877) 550-6892 and ask for Gus directly; he’ll tell you honestly whether it’s worth an emergency visit or whether waiting a few days for a normal appointment will cost you very little in lost production.
Our pricing for Cotati matches what we charge in Rohnert Park, Roseland, Petaluma, and Santa Rosa. The range runs $150 to $280 for residential work, and there’s no trip charge inside our own county, so being slightly off our usual route doesn’t add cost. The only thing that changes the number is your roof’s height, panel count, and condition.
Every panel cleaning we do in Cotati falls under the same 90-Day Done Right Promise we put on every job in writing. If the cleaning wasn’t done right, call and Gus will make it right. That promise is the whole reason his name is on the building, and it’s why we don’t ask you to sign anything before you’ve had time to think.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Cotati and Sonoma County with honest solar work since 2011.






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