12B Clean
At 12B Clean, we don’t shy away from anything—and I mean absolutely anything—when it comes to cleaning. Our three divisions are staffed by intelligent and highly trained people who know exactly what is expected of them.
Higher returns, with no risk to your roof
Cleaning Solar Panels
Cleaning solar panels requires professionals who understand what glass and coatings can withstand. 12B Clean cleans solar panels on residential homes, commercial buildings, and large roofs in Zeeland, South Holland, and North Brabant, using osmosis water and a method tailored to your specific situation. From a single roof to an entire solar roof on a distribution center, we ensure that your panels capture the maximum amount of light again.
- 100% Price Guarantee. The quote is the invoice. Always!
- 100% Craftsmanship. VCA-certified and we never apply high pressure to your panels.
Customers rate us with a
9.8
What is solar panel cleaning?
Cleaning solar panels involves the professional removal of dirt, deposits, and bird droppings from the glass of your system. Cleaning solar panels refers to the same process; both terms describe the restoration of your panels’ light absorption. However, cleaning solar panels differs from regular window cleaning: while window cleaning focuses on your windows, this involves sloped glass that needs to generate energy.
Pollen, fine dust, moss, and Saharan sand combine to form a thin film on the panel. This layer adheres to the surface and is not completely washed away by rain. Our experts remove this film without damaging the coating, so that the glass is clear again and your system can once more capture light fully.
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Does cleaning solar panels really make a difference?
Yes, but not to the same extent on every roof. Dirty panels produce less energy, though the difference depends on your specific situation: the pitch, the orientation, and the degree of dirt buildup. Panels on a steep roof in a clean environment are largely self-cleaning thanks to rain.
Panels on a flat roof, along a busy road, next to a farm, or under trees don’t do that. In those locations, dirt builds up and you’ll see your energy output drop. So we’re not claiming that every panel needs to be serviced annually. During the initial assessment, our experts will inspect your roof and give you an honest opinion on whether cleaning is worthwhile.
We never say no to a job
No matter how difficult it is, we'll get it done.
How often should you have your solar panels cleaned?
For most roofs, one cleaning per year is sufficient. The best time is early spring, just before the six sunniest months of the year. That way, your panels will be clean during the period when they generate the most energy.
If your property is located along a highway, next to an industrial park, or under trees, we recommend two cleanings per year. After a period of Saharan sand or a long dry spell without rain, an extra cleaning may be worthwhile. Would you like to have your solar panels cleaned at a set time each year? We’ll schedule your cleanings in advance—possibly in conjunction with your building’s window cleaning—so you don’t have to worry about a thing.
Our Process: How Our Professionals Clean Your Panels
Every roof requires a unique approach. Our professionals select the method that will deliver the best results safely and efficiently for each specific situation.
Streak-free with osmosis water
We clean your panels with osmosis water—the same demineralized water our window cleaners use to clean your windows. All lime and minerals have been filtered out. As a result, the water dries without leaving streaks and doesn’t leave a white film that blocks light again. Soap isn’t necessary, which prevents soap residue from forming—residue to which new dust can adhere.
Telescopic cleaning from the ground
Using telescopic poles and soft brushes, we clean your panels from the ground. No ladders are required, and no one walks on your roof tiles. The brush loosens the dirt, and the reverse-osmosis water rinses it away immediately afterward. We never use a pressure washer: it forces water along the edges and the sealant, damaging the coating.
Large Roofs and Systems
Is your system located on an industrial building, a warehouse, or the flat roof of a distribution center? If so, we’ll use aerial work platforms or roof safety equipment, and our VCA-certified team will work in accordance with your site’s safety regulations. We can even handle a roof with hundreds of panels. We’ll coordinate the schedule with your business operations so that your processes can continue as usual.
Cleaning Solar Panels for Any Type of Roof
Are you looking for a company that can clean your solar panels without damaging your roof? Our professionals work for both residential homeowners and commercial clients, from facility managers to property managers. We tailor our methods and schedule to your specific situation, regardless of the type of roof.
- Homes and sloped roofs. Cleaned from the ground, without anyone having to climb onto your roof.
- Commercial buildings and warehouses. Large installations at height, handled safely with the right equipment.
- Agricultural businesses. Barn roofs collect dust, pollen, and manure; periodic cleaning is the quickest way to keep them clean.
- Distribution centers and solar roofs. Hundreds of panels installed according to a tight schedule, tailored to your logistics.
- Homeowners' Associations and Property Management. Common facilities, managed through a single point of contact.
- Schools and healthcare facilities. Working discreetly and away from the hustle and bustle in schools and healthcare facilities.
- Panels, glass, and facades. Combine cleaning your panels with facade cleaning for a complete exterior.
Why Choose 12B Clean?
Cleaning solar panels is—and always will be—a specialized skill. As a solar panel cleaning company, we use certified equipment, and our staff know exactly what the glass and coating can withstand.
- Brilliant results. Streak-free, spotless panels thanks to the power of pure osmosis water.
- Safe and risk-free. We work from the ground whenever possible, using low pressure and soft brushes.
- Experienced and certified. VCA-certified professionals with an eye for detail.
- Honest advice. If cleaning your roof isn't worth the trouble, we'll just tell you so.
- A Complete Solution. Combine your solar panel maintenance with window cleaning or general facility cleaning services for your building and benefit from a single point of contact.
That way, you don't have to worry about a thing and you'll have more time to focus on running your business.
Solar Panel Cleaning in Zeeland, South Holland, and North Brabant
Our professionals are from the region and can be on site quickly. With our local teams, we clean solar panels on homes, commercial buildings, and institutions in cities such as Goes, Middelburg, Vlissingen, Rotterdam, Dordrecht, The Hague, Breda, Tilburg, and Eindhoven. Thanks to our short travel times, we can schedule your regular maintenance visits flexibly.
Frequently Asked Questions About Cleaning Solar Panels
Can I clean my solar panels myself?
Yes, you can clean your panels yourself using a telescopic pole and a soft brush. Only do this from the ground, and never climb onto a sloped roof. Do not use abrasive cleaners or a pressure washer, and do not touch the wiring. If your system is located high up, on a flat roof, or out of reach of a pole, leave it to the professionals.
What's the best way to clean your solar panels?
Reverse-osmosis water is the best option: demineralized water free of lime and minerals, which dries without leaving streaks and doesn’t require soap. If you don’t have a reverse-osmosis system, rainwater is a good alternative, since it’s also lime-free. Tap water leaves white lime stains that block light. Always use a soft brush; never use a scouring pad.
Is it worth cleaning solar panels?
That depends on your roof. Panels with a steep pitch in a clean environment are mostly washed clean by rain. If your system is flat, located along a busy road, next to a farm, or under trees, dirt will accumulate and your energy output will drop noticeably. During the initial consultation, we’ll assess your situation and give you an honest assessment of whether cleaning is worth it.
When is the best time to have your solar panels cleaned?
Early spring is the best time, just before the six sunniest months of the year. That way, your panels will be clean during the period when they generate the most power. After a period of Saharan dust or a long dry spell without rain, an extra cleaning may be worthwhile. In the fall, it’s a good idea to check for leaves.
Is it okay to clean solar panels with a pressure washer?
No. A high-pressure washer forces water along the edges and the seal of the panel and can damage the coating. Microcracks in the glass are also a real risk, and you won’t notice them until they affect your energy yield. That’s why we always use low pressure, deionized water, and a soft brush.
Bird droppings on your solar panels
Bird droppings are the most stubborn type of contamination on a solar panel. Droppings that bake onto the glass completely block the light and, over time, damage the coating. If bird droppings are a recurring problem on your roof, cleaning alone isn’t enough—we’ll also investigate the cause. Read more on our page about removing bird droppings from solar panels.
The Workers are well-versed in all standard cleaning tasks.