How often should I have my solar panels cleaned?

Cleaning frequency depends on your environment:Urban area (fine dust, soot): annuallyAgricultural area (dust, pollen): 1-2 times a yearCoast area (salt precipitation): 1-2 times a yearSolar parks/industry: every 3-6 monthsDoubtful? Get tailored advice from Solarco or read more on our tips page.

Which cleaning methods are safe for solar panels?

Osmosis water: 100 % free of minerals, leaves no limescale streaks.Soft, anti-scratch brushes: protect the glass and coating layer.No pressure washer or abrasives: prevents damage to seals and glass.

How do I request a quote for solar panel cleaning?

Go to our quote page and fill in the short form:Number of panelsLocation and installation typeDesired cleaning frequencyWithin 24 hours you will receive a customised, no-obligation quote.Do you have any questions? Call us on +32 468 18 56 40 or email info@solar-co.be.

Have your solar panels cleaned by experts

Our solar panel cleaning service ensures that your solar panels deliver maximum output and last longer. With our innovative techniques and environmentally friendly approach, we keep your solar panels in top condition.

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Yield loss calculator

Why have solar panels cleaned?

Cleaning solar panels is not a cosmetic procedure, but maintenance that directly affects performance and service life. In industrial environments, dust, pollen/resin, bird droppings and industrial precipitation adhere to the glass. This layer reduces the translucent and creates local shade, which hotspots can cause (local overheating resulting in accelerated degradation). Rainwater washes away loose dirt, but leaves minerals behind and does not consistently remove stubborn deposits.

Professional have solar panels cleaned:

Keep your yield stable by restoring optical transmission.
Limited wear and tearControlled, robot-controlled brush pressure and osmosis water prevent micro-scratches and residue.
Reduces the risk of malfunctionsDuring cleaning, we combine visual/thermographic checks to detect incipient defects.
Fits within warranty conditions: correct method without aggressive detergents or high pressure.

In short: regularly solar panel cleaning is a rational measure to avoid loss of yield and protect the asset.

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How often should you have your solar panels cleaned?

The correct frequency is site-specific. It depends on pollution pressure, panel inclination and business activities. Guidelines for commercial/industrial sites:

Standard roofs (15–30° slope), moderate environment: once a year.
Dust-intensive sectors (logistics, agriculture, concrete/steel, near busy roads/railways): twice a year.
East-west configurations with low slope (<10°) or flat roofs with edge turbulence: twice a year (faster film development).
After work or peak pollution (pollen storm, construction site activities, Saharan dust): ad hoc schedule an appointment.

Practical indicators not to wait:

Visible haze/uneven spots or bird droppings that do not wash away.
Continued decline in performance ratio compared to similar days/years.
Thermographic indications for partial coverage or hotspots.

Solarco determines the optimal cleaning frequency based on your production data, slope angle, contamination profile and visual/thermal inspection, and records this in a maintenance schedule with minimal impact on your business operations.

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Solar panel cleaning at Solarco

Professional and environmentally friendly

Solarco uses professional techniques to clean your solar panels, including robotic cleaning systems and osmosis water. This is not only better for your panels, but also better for the environment as no harsh cleaning agents are involved in our solar panel cleaning.

Safety first

We always work according to strict safety guidelines. Our operators are fully certified and trained to work on aerial platforms and roofs. Moreover, we have comprehensive insurance that covers any kind of risk or liability. This allows us to safely clean solar panels.

Innovative cleaning robots

For large solar parks or extensive roof installations, Solarco deploys robot cleaners. These robots run on batteries and are certified by renowned module manufacturers. The robot can quickly and evenly clean large installations of solar panels without damaging the panels.

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Price solar panel cleaning

Across the industry, the cost of professional solar panel cleaning averages between €5 and €10 per panel, depending on accessibility and degree of soiling. At Solar-Co, we charge for private installations up to 25 panels a fixed starting rate of € 125, with a surcharge of €5 for each additional panel. For commercial installations we charge €2 per panel and for industrial projects even just €1.50 per panel. This makes Solarco a price-conscious option for cleaning your solar panels.

In the table opposite, you will find a brief price overview for the different types of cleaning. for a comprehensive overview and more details, please refer to our complete solar panel cleaning price page

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Type of cleaning	Price/panel	Price for 100 solar panels
Private	€5	€500
Commercial Installation	€2	€200
Industrial Installation	€1,5	€150

See the entire price list here

Clean solar panels yourself or have them cleaned?

Cleaning your solar panels yourself with a sponge and lukewarm water is financially attractive - you pay on average only €10-€50 per cleaning - but also has clear disadvantages. Without the right materials and experience, you can cause scratches, inspections for possible damage are not carried out, and stubborn dirt such as bird droppings or algae is often insufficiently removed . In contrast, professional cleaning by Solarco costs €125 per turn for installations up to 25 panels, but offers you a complete package: streak-free results with deionized water, a thorough visual inspection and detailed report, and usually a annualised yield improvement of 10-20%.

Although the immediate investment is higher, you will save in the long run thanks to reduced maintenance and repair costs, preservation of your warranty and continued optimal returns. For step-by-step tips on how to safely and effectively clean solar panels yourself or why it is better to choose a professional anyway, check out our comprehensive How to clean solar panels page.

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How we clean solar panels at Solarco

Thorough pre-inspection

Our specialised technicians carry out a comprehensive inspection to determine the condition of your solar panels and the level of contamination. This helps us draw up a customised cleaning plan for your solar panel cleaning.

Preparation and equipment

We deploy our modern cleaning equipment, including a long, extendable brush and a system that delivers osmosis water from a special tank. This ensures that we can reach all panels safely and effectively.

Professional Solar Panel Cleaning

Using a soft brush, we apply pure osmosis water to your solar panels. This water completely dissolves dirt and deposits without leaving any harmful residues. We then carefully rinse the panels so that no staining occurs.

Aftercare and Advice

After solar panel cleaning, we recheck whether all contamination has been removed and advise on maintenance. We recommend having your solar panels cleaned at least once or twice a year for optimal efficiency.

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Advantages of professional solar panel cleaning at Solarco

Higher efficiency: Several studies show that cleaning solar panels can provide an efficiency improvement of a few percent to as much as 15%, depending on the degree of contamination.
Longer lifespan: By preventing dirt build-up and hot spots, your entire system will last longer.
Safety and warranty: Many manufacturers recommend professional cleaning to maintain the warranty. Climbing a roof yourself is also not without risk.
Time savings: With the right tools and experience, we can take care of a large installation in a short time, while you yourself spend your precious time on other things.
Sustainable approach: Osmosis water and robotic cleaning minimise the use of harmful chemicals, which is better for the environment as well as for the panels themselves.

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Solar panel cleaning all over Belgium, the Netherlands and France.

At Solarco, we have carried out an impressive range of cleaning projects: from residential and commercial roofs to large-scale solar parks. Our specialists provided shiny clean panels in towns and villages throughout Flanders, and are active in the rest of Belgium, the Netherlands and even France. Thanks to our mobile cleaning units and years of experience, we guarantee a thorough, sustainable approach every time - regardless of the size or location of your installation.

North Brabant (NL)

13000 modules

Limburg (BE)

<2000 modules

West Flanders (BE)

7500 modules

West Flanders (BE)

850 modules

East Flanders (BE)

37500 modules

East Flanders (BE)

450 modules

Flevoland (NL)

37,000 modules

Liege (BE)

3000 modules

Namur (BE)

13000 modules

West Flanders (BE)

3000 modules

Antwerp (BE)

800 modules

Wast-Flanders (BE)

<2500 modules

Frequently asked questions about solar panel cleaning

Professional cleaning removes stubborn dirt such as bird droppings, algae and industrial deposits that can reduce your efficiency by 5-25 %. An expert uses osmosis water and soft brushes, performs an inspection for possible damages and prevents 'hotspots', making your installation last longer and guarantee optimal performance.

The cleaning frequency depends on your environment:

Urban area (particulate matter, soot): annual
Agricultural area (dust, pollen): 1-2 times a year
Coastal (salt precipitation): 1-2 times a year
Solar parks/industry: every 3-6 months
In doubt? Get tailored advice from Solarco or read more on our tips page.

At Solarco, for private installations (1-25 panels) you pay a flat rate of €125 and €5 per additional panel. Commercial installations cost €2 per panel, industrial €1.50 per panel. See the full 2025 price list for all the details.

Cleaning yourself with a sponge and lukewarm water is possible for light soiling (€10-€50 per turn), but carries risks: scratches, no inspection and insufficient removal of stubborn dirt . For a streak-free result, inspection and yield increase, it is better to opt for professional cleaning.

Osmosis water is stripped of all minerals and contaminants. Rainwater contains lime (calcium, magnesium) and pollution from the air, causing white scale and sticky residues when it dries. Osmosis water cleans streak-free, maximises your yield and protects the surface.

Osmosis water: 100 % free of minerals, does not leave lime streaks.
Soft, anti-grazing brushes: protect the glass and coating layer.
No high-pressure cleaner or abrasives: prevents damage to seals and glass.

Hotspots occur due to unevenly distributed dirt or micro-damage, which generates more heat locally and can cause panel damage. Regular professional cleaning prevents dirt build-up and makes inspection identify problems in time.

Go to our quotation page and fill in the short form: