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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.
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AfterFast, Reliable Solar Panel Cleaning Across Napa
Solar panel cleaning in Napa typically runs $180 to $340 for a standard residential array, and most jobs are finished in under two hours. If your panels sit under the fog line on the valley floor or near a winery crush pad, that cleaning is not optional maintenance. It is production you are losing every single morning. Gus’s Solar has been keeping Napa panels producing at full tilt since 2011, and when you call (877) 550-6892, Gus Petrakis or one of his crew answers, not a phone tree.
Why Gus’s Solar Is Napa’s Preferred Solar Panel Cleaning Company
We are the local outfit that shows up in a truck with Gus’s name on the door. That matters in Napa, where people still ask their neighbor who they used before they call anyone. Our Solar Panel Cleaning crew knows the difference between fog residue on a valley floor array and grape-skin dust on a winery roof off Silverado Trail, and we plan the work accordingly.
When you call us about cleaning your panels in Napa, you get a straight answer about when we can be there. We schedule cleaning for the same week in most Napa neighborhoods, from Old Town to Browns Valley to the east side off Imola Avenue. The person who answers the phone is a live human being, 24/7, and that human can tell you exactly which day the crew will show up.
We do not send subcontractors onto your roof. Gus’s own uniformed, background-checked crew does the work, and every job carries the 90-Day Done Right Promise in writing. If something is not right, one call brings Gus back. That is how we have kept Napa customers calling us back for over a decade and counting.
We serve all of Napa, including the ZIP codes 94558, 94559, and 94581, and we are the crew you will run into at the hardware store next week. That is the point.
Our Solar Panel Cleaning Services in Napa
Here is what we actually do when you call us for Solar Panel Cleaning in Napa. No vague packages. Just the work, named plainly.
Residential Panel Cleaning
Most Napa homes lose 5 to 15 percent of their solar production to soiling, and that fog layer rolling through the Carquinez Strait every summer morning leaves a fine mineral film on valley-floor panels that rain will not wash off. We clean residential arrays with deionized water and soft brushes, not pressure washers. The job is done in under two hours on most Napa rooftops, and we walk the array afterward to confirm every panel is spotless.
Commercial Array Cleaning
Napa is not like other small cities. The wineries and vineyard operations that define this valley run big rooftop arrays on barrel rooms, fermentation buildings, and crush pads, and those arrays collect a film of grape-skin dust, crush-pad fines, and harvest debris that a residential cleaning schedule would never catch. During harvest, a winery rooftop array near the crusher can lose 10 to 15 percent of weekly yield to that dust. Our commercial cleaning crew tracks that soiling curve and schedules cleanings before the losses stack up. We cleaned a 120-panel SolarEdge array on a winery’s barrel-room roof off Silverado Trail last August. The panels had a visible film of grape-skin dust plus crush-pad fines cutting production by 18 percent on the inverter’s daily production estimate. Our crew used DI-water brushing and no ladders, just a 40-foot reach and harness tie-offs, and restored the array to within 2 percent of its model in one morning without interrupting the customer’s crush schedule.
Bird & Critter Guard Installation
Pigeons and roof rats love the space under Napa solar panels, especially on older Craftsman and Victorian homes near downtown where roof lines offer sheltered nesting spots. We install critter guard around the array perimeter, which keeps birds out and stops the buildup of droppings and nesting debris that can etch panel glass and block airflow. The guard also deters squirrels from chewing the wiring. It is a one-time fix that prevents a recurring cleaning bill.
Debris & Soiling Removal
Napa has its own specific soiling problem. It is not just dust. It is grape-skin film, crush-pad fines, oak pollen in spring, ash from fall vineyard burns, and the mineral film left by that daily summer fog. We remove all of it with the right cleaning method for your array type, whether that is DI-water brushing for glass-face panels or a gentler approach for older modules with micro-cracking risk. Afterward, we show you the before-and-after production numbers from your monitoring app so you can see the yield you got back.
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.
Scheduled Cleaning Plans
Napa homeowners and winery facility managers do not have to remember to call us. We set up scheduled cleaning plans that match your soiling curve. A residential array on the valley floor might need cleaning twice a year, right after the spring pollen drop and again in late summer when the fog film and dust have built up. A winery rooftop near the crush pad needs more aggressive scheduling during harvest, sometimes every three to four weeks from August through October. We put the schedule on our calendar, show up on time, and send you a production comparison after each visit. You never chase us. We call you.
Post-Storm Panel Cleaning
Napa storms are not frequent, but when they hit they leave the panels dirty. Spring windstorms blow oak pollen and dust onto the array. Fall rains leave silt film on the glass. And if a fire happens up in the hills, ash falls across the whole valley and cuts production immediately. Our post-storm cleaning gets your array back to full output fast. Call us the morning after a storm, and we will be on your Napa roof that week, often the next day.
Trusted Brands We Service in Napa
Our crew cleans and maintains panels from every major manufacturer you are likely to have on your Napa roof. That includes Qcells, REC, SunPower, and Panasonic, plus full inverter support for SolarEdge and Enphase systems. We know how each brand’s glass coating responds to cleaning chemicals, which means we will not use a product that voids your warranty. When we schedule a Napa cleaning, we bring the right equipment for your specific modules, and we stock common replacement parts at our Bay Area office so a broken connector or a cracked junction box does not mean a second trip.
Common Solar Panel Cleaning Problems We See in Napa Homes
- Fog film on valley-floor arrays: The marine layer that pours through the Carquinez Strait on summer mornings leaves a fine mineral residue on panel glass. If you clean before that fog burns off, the water spots dry right into it. We wait until the layer clears, usually by late morning, and the result is a streak-free finish.
- Crush-pad dust on winery rooftop arrays: Harvest season kicks up a fine dust from grape crushing that settles on nearby rooftop panels. That dust is sticky and oily, not dry, and it will not come off with a garden hose. We use a specialized cleaning approach for these arrays, and we schedule extra cleanings during crush.
- Pigeon nesting under panels on older Napa roofs: The steep, gabled roofs on early-1900s Victorians and Craftsman homes near downtown give pigeons exactly the covered space they want. Droppings etch glass and block airflow, and nesting material can trap moisture against the roof deck. We remove the nests, clean the array, and install critter guard so they do not come back.
- Agricultural Preserve ground-mount confusion: On vineyard-zoned parcels, Napa County’s 1968 Agricultural Preserve ordinance means ground-mount solar requires a special use permit. Some property owners assume they can put panels anywhere, and the array goes in without the permit. That does not affect cleaning directly, but it means we always check the parcel status before we schedule work on a vineyard property. You do not want a cleaning visit to turn into a code enforcement conversation.
Pricing for Solar Panel Cleaning in Napa, CA
Here are the straight numbers for Napa, not a vague “depends on the job.” A residential panel cleaning in Napa runs $180 to $340 depending on array size, roof steepness, and access. A standard 20-panel rooftop array on a single-story ranch home in Napa runs about $220. If you have a two-story home or a steep Victorian roof, expect $280 to $340. Commercial arrays on winery buildings start at $400 to $1,500 depending on panel count and whether we need boom-lift or harness work. Critter guard installation adds $150 to $400 depending on array perimeter. Scheduled cleaning plans are discounted 10 percent per visit when you sign up for a year. And if you are a senior or a veteran, that 10 percent discount stacks and never expires. Call (877) 550-6892 for an exact quote. The estimate is free, and the number we quote is the number you pay, period.
We Also Serve Cities Near Napa
We clean panels across Napa County and into neighboring towns. If you are in Sonoma, Boyes Hot Springs, Fairfield, or American Canyon, we send the same crew and the same 90-Day Done Right Promise. Scheduling is coordinated from our Bay Area office, but the team working on your roof is Gus’s own, not a sub. Call (877) 550-6892 and tell us which town you are in.
Serving Napa, CA - Our Local Coverage Area
We’re based in the Napa 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 Napa
A winery rooftop array near a crush pad can lose 10 to 15 percent of its weekly yield to grape-skin dust and crush-pad fines during peak harvest, and that loss compounds daily until the panels are cleaned. A generic quarterly residential cleaning completely misses that curve. If you run a winery facility in Napa, call (877) 550-6892 before harvest starts, and we will set a cleaning schedule that follows your crush calendar.
No. The Agricultural Preserve rules in Napa County affect where panels can be installed, specifically restricting ground-mount systems on vineyard-zoned parcels without a special use permit. Cleaning rooftop panels on existing winery buildings does not require a permit. That said, we always confirm the parcel status before starting work so there are no surprises if a county inspector happens to be on the property.
We can, but we usually won’t. The marine fog layer that sits over the Napa Valley floor on summer mornings leaves moisture on the panel glass, and cleaning at that point just smears the mineral film around. We schedule valley-floor cleanings for late morning, once the layer burns off and the glass is dry. The result is a clean, streak-free array, and it takes no longer than an early-morning visit would. If you are near the fog line, tell us when you call and we will time the visit right.
Yes, in one important way. Microinverter arrays, like most Enphase systems in Napa, let us see production at the individual panel level. That means we can identify exactly which panels are underperforming from soiling before we even climb onto the roof. For string systems with a single SolarEdge or other inverter, we look at the string-level numbers instead. Either way, the cleaning method itself is the same: DI water, soft brushes, and no pressure washing. But the diagnostic step is more precise on microinverter systems, and we use that to show you the exact production gain after cleaning. Call (877) 550-6892 if you want the before-and-after data from your specific system.
Carefully, and with harness tie-offs. A steep Victorian roof in Napa is not the place for a ladder stunt. Our crew uses proper fall protection on any roof with a pitch above 7/12, and we use a 40-foot reach and DI-water brushing so we do not need to walk all over a fragile 120-year-old roof. The cleaning still costs more than a flat ranch roof, typically $300 to $340, but the work is done safely and the roof is left untouched. If you call (877) 550-6892, we will walk you through exactly how we handle your specific roof before we ever set foot on it.
Call Gus’s Solar for Panel Cleaning in Napa
If your Napa panels are dirty, the fix is one call away. Call (877) 550-6892, ask for Gus, and get a straight answer about when the crew can be on your roof and what it will cost. No pressure, no signature tonight. Take two weeks to think about it. The price will be the same. If a salesman needs an answer tonight, the answer is no. That is not how we work. We are the locals, we will be here next year, and we will answer the phone when you call. Call (877) 550-6892 today for a free estimate.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Napa since 2011.