The cost to clean solar panels typically runs $150–$500 per visit, but the right price depends on where you live, how many panels you have, and how dirty they get.
Before we get into the full breakdown, use the calculator below to get a number specific to your system and location:
☀️ Solar Panel Cleaning Calculator
Find out how much dirty panels are costing you, and whether a cleaning pays off in your area.
⚡ Estimated annual production: — kWh/year for your — kW system at your location (NREL PVWatts®). Local electricity rate: —¢/kWh (EIA).
How we calculate this
This calculator uses three authoritative government and peer-reviewed data sources to generate location-specific estimates:
Solar production (NREL PVWatts® v8): Annual energy output is estimated using the NREL PVWatts® Calculator, a National Renewable Energy Laboratory model that uses hourly weather data and satellite-derived solar irradiance to calculate expected system output at any US location. Assumes 20° tilt, south-facing array, standard module type, and 14% system losses.
Electricity rates (U.S. EIA): State residential retail electricity rates are sourced from the U.S. Energy Information Administration Electric Power Monthly, Table 5.6.A. Updated annually.
Soiling loss rates: Daily efficiency loss due to dust, pollen, bird droppings, and debris is based on photovoltaic soiling research (Kimber et al.) and technical reports from Lawrence Berkeley National Laboratory and NREL, segmented by US climate zone. Arid markets (AZ, NV, NM) experience significantly higher daily soiling than high-rainfall markets (WA, OR).
Cleaning cost benchmarks: Regional cleaning cost ranges are derived from SolarCleanHub's directory of 449+ verified cleaning professionals across 14 US metros, supplemented by published ranges from EnergySage and Angi.
Results are estimates. Actual energy loss and savings will vary based on panel angle, shading, soiling type, system age, and local weather conditions.
What Does Solar Panel Cleaning Cost?
For most residential homeowners, professional solar panel cleaning costs $150 to $500 per visit, with most single-story homes landing in the $250–$350 range. Annually, you should budget $390 to $720 if you’re cleaning twice a year, which is the standard recommendation.
Companies typically charge per panel or a flat rate per visit, with annual plans bundling multiple cleanings at a discount.
| Pricing Model | Typical Range |
|---|---|
| Per panel | $5 – $20 per panel |
| Per visit (flat rate) | $150 – $500 |
| Annual maintenance plan | $390 – $720 |
A typical residential system has 20–25 panels. At $10 per panel, that’s a $200–$250 cleaning, right in the middle of the range above.
How Do Companies Charge?
Most companies price one of three ways, and the model they pick tells you something about how they operate.
Per-panel pricing is the most common and the easiest to compare. Count your panels, multiply by the rate, and you know the cost before anyone climbs a ladder. Standard residential rates run $5 to $15 per panel. Steep roofs, awkward array placement, and heavy soiling push that to $20 or more.
Flat-rate pricing shows up with smaller systems and companies that want simple quotes. A typical structure: $150 flat for any system under 15 panels, then a per-panel charge above that.
Annual maintenance plans bundle two or more visits at a discounted per-cleaning rate. In dusty markets like the Central Valley or the Phoenix metro, where panels need attention more than once a year anyway, the plan usually beats paying per visit.
Ask about minimum trip fees before you book. Some companies charge $75 to $150 just to come out, which changes the math fast on a small system. A quote should state whether travel is included.
What Affects the Price?
Six things move a cleaning quote up or down.
Panel count drives the base price, but not in a straight line. Bigger systems take longer, yet the per-panel rate usually drops because travel and setup costs spread across more work.
Roof pitch and height matter more than most homeowners expect. A steep pitch or a second story means harnesses, extended poles, and sometimes scaffolding. Budget 20 to 40% above what a low, walkable roof of the same size would cost.
Condition counts too. A system on a routine annual schedule cleans quickly. Panels untouched for three years carry caked pollen, bird droppings, and wildfire ash that take real labor and sometimes specialized solutions to remove.
Water quality is the sleeper factor. Hard tap water leaves mineral deposits that cut efficiency the same way dirt does, so professionals run deionized or filtered water systems, and that equipment shows up in the price. Much of Arizona and Nevada sits on very hard water, which is exactly where the deionized equipment earns its keep.
Mount type changes everything. Ground-mounted arrays skip roof access and safety gear entirely, which makes them dramatically cheaper to clean and the easiest candidate for DIY.
Location sets the baseline. Labor in California, Hawaii, and the major metros runs 15 to 25% above the national average.
Your location also affects how urgently cleaning pays off. Calculate your ROI here.
Solar Panel Cleaning Costs by State
Not all markets price the same. Here’s a regional breakdown based on data from cleaning companies and homeowner-reported pricing:
| State/Region | Typical Per-Visit Cost | Notes |
|---|---|---|
| California | $200 – $550 | 10–20% above national avg; wildfires and dust increase frequency |
| Arizona | $150 – $400 | Hard water surcharge common; very dusty conditions |
| Texas | $150 – $400 | Large systems common; competitive market |
| Florida | $175 – $425 | Humidity, pollen, and bird activity drive up frequency |
| Nevada | $150 – $375 | Desert dust; dry climate means fewer rinse-only visits work |
| Hawaii | $225 – $600 | Highest labor costs in the US; salt air adds corrosion risk |
→ See what cleaning costs for your specific system and location
California note: The state’s diverse climate zones create meaningfully different needs. Central Valley homeowners deal with agricultural dust and wildfire ash, and many schedule 3–4 cleanings per year instead of the standard two. Coastal homeowners face salt buildup that requires more thorough cleaning but typically less frequency. If you’re in Southern California, Santa Ana winds can deposit a full season of dust in a single weather event.
Post-wildfire cleaning is a separate cost category entirely. Wood ash is alkaline and bonds to panel glass once it gets wet, so it should come off within days rather than weeks. Specialized post-fire cleaning typically runs $200–$400 for a residential system.
Arizona note: Cleaning a residential system in the Phoenix metro runs $150 to $400 per visit, and that range holds across Mesa, Chandler, Gilbert, Scottsdale, Tempe, Queen Creek, Goodyear, Peoria, and Surprise. Two local factors push Valley quotes toward the top of the range. Monsoon dust storms can coat an array in a single afternoon, and the region’s hard water forces professionals to use deionized water systems instead of a hose rinse. Per-panel pricing follows the standard $5 to $20 spread, with mineral removal and heavy dust landing most quotes in the middle. Browse verified solar panel cleaning companies in Phoenix to compare providers across the metro, or run your numbers in the calculator above.
Nevada note: Las Vegas area cleanings run $150 to $375, covering Henderson, Summerlin, North Las Vegas, Enterprise, and the broader valley. The desert works against panels twice here: almost no rainfall means nothing rinses off naturally, and the valley’s notoriously hard tap water leaves mineral spotting unless cleaners use purified water. Find solar panel cleaning companies in Las Vegas serving the full metro.
DIY vs. Professional: What’s the Real Cost Difference?
DIY cleaning isn’t free. Here’s what you’d spend to do it properly:
| Item | Estimated Cost |
|---|---|
| Reliable ladder | $100–$300 (if you don’t own one) |
| Soft-bristle brush or squeegee on extension pole | $30–$80 |
| Non-abrasive cleaning solution | $15–$30 |
| Garden hose with gentle nozzle | Already own or $20–$40 |
| Total first-time setup | $145–$450 |
After the first year, DIY costs almost nothing per cleaning. So the math does favor DIY over time, if you’re comfortable on a roof.
The real risks of DIY aren’t the obvious ones. Most people worry about falling. But the less-obvious risks are: using the wrong water (hard water leaves stubborn mineral deposits), using pressure washers (which can break panel seals and void warranties), or using abrasive materials that micro-scratch the glass surface. Done wrong, DIY cleaning causes the exact problem you were trying to prevent.
Bottom line on DIY: It makes sense if you have a ground-mounted system, easy single-story roof access, and access to filtered water. For second-story roofs, steep pitches, or any system over 25 panels, professional cleaning is the safer and often smarter choice once you factor in risk. Going the DIY route anyway? Follow our step-by-step DIY solar panel cleaning guide.
How Often Do You Actually Need to Clean?
Cleaning frequency directly affects your annual cost, and how often you need to clean depends heavily on where you live. The standard recommendation is twice a year, but that’s a starting point, not a rule for everyone.
You likely need more frequent cleaning if:
- You’re in a high-dust area (Central Valley, Phoenix, Las Vegas)
- You’re near agricultural operations or construction
- You have significant wildlife activity (bird droppings degrade panels fast)
- Your panels are low-angle or flat, so rain doesn’t rinse them as effectively
- You’re in wildfire-prone areas of California or the Pacific Northwest
You may get away with once a year if:
- You’re in a rainy climate like the Pacific Northwest (outside of summer)
- Your panels are steeply pitched and rainfall does most of the work
- You have a monitoring system that shows no meaningful efficiency drop
One useful test: check your system’s monthly output against the same month from the prior year. A 10%+ drop that isn’t explained by weather or shade is often a cleaning issue.
Is the Cost Worth It?
Yes. The math backs it up.
For a deeper look at the numbers, see our full breakdown of whether solar panel cleaning is worth it.
Soiling losses scale with your environment. Researchers at the National Laboratory of the Rockies (formerly NREL) project that even a modest 4% average soiling loss, a level found in parts of the US, adds up to roughly 10 gigawatts of lost power and $2 billion in lost revenue worldwide every year. NLR puts typical US losses at up to 7% of annual output, and dust that cements onto glass through overnight dew cycles eventually resists even heavy rain.
Field data backs that up. At five North Carolina solar plants studied by NLR, pollen alone cut production by up to 15% at its peak, and rainfall failed to restore the panels to their cleaned baseline. Heavy buildup like bird droppings or wildfire ash pushes losses higher still.
Now put dollars on it. A California home generating $1,800 a year in solar savings loses about $125 annually at a 7% soiling rate, and around $270 if losses reach the 15% measured in the pollen study. Use our calculator to see exactly what dirty panels are costing you each month. In high-soiling markets, a $250–$350 professional cleaning typically pays for itself within the year through restored production.
Cleaning also protects your warranty, though not in the way most people assume. Manufacturer warranties rarely require professional cleaning. What they do exclude is damage from improper cleaning: pressure washing, abrasive tools, and harsh chemicals can all void coverage on a $15,000+ system. Hiring a cleaner who follows manufacturer-approved methods removes that risk along with the dirt.
How to Find a Solar Panel Cleaner Near You
Not all window washing companies know how to clean solar panels correctly; using the wrong water, wrong brushes, or wrong pressure can cause real damage. Look for companies that:
- Specifically list solar panel cleaning (not just window washing)
- Use deionized or purified water
- Carry liability insurance
- Can show references or reviews from solar panel owners
SolarCleanHub lists 449 verified solar panel cleaning companies across 19 states, including more than 230 in California alone. You can browse by city, compare ratings, and request quotes from local providers who specialize in this work.
→ Find solar panel cleaners in your state
Quick Reference: Solar Panel Cleaning Cost Summary
- Typical per-visit cost: $150–$500
- Per-panel rate: $5–$20
- Annual budget (2 cleanings): $390–$720
- California: 10–20% above national average
- DIY first-year cost: $145–$450 in equipment
- Efficiency loss from soiling: up to 7% in typical US conditions, 15% or more with heavy buildup
- Use our solar panel cleaning calculator
- Recommended cleaning frequency: 1–2x per year (more in dusty climates)