Washing of photovoltaic panels
Why is regular washing of photovoltaic panels crucial?
The cleanliness of photovoltaic panels has a direct impact on their energy efficiency. Even minor dirt can significantly reduce the amount of sunlight reaching the cells, resulting in a decrease in system productivity. Regular cleaning of the panels not only increases their efficiency, but also contributes to prolonging their life, providing owners with a better return on investment. Mansser offers professional cleaning services for photovoltaic panels, using the latest technologies and methods to maximise their efficiency and protect them from damage due to dirt accumulation.
How does dirt affect the performance of photovoltaic panels?
Dirt, dust, leaves, bird droppings and other contaminants deposited on the surface of photovoltaic panels can significantly reduce their performance. These contaminants block sunlight, preventing it from effectively reaching the solar cells. Studies have shown that even a light layer of dust can reduce the efficiency of panels by 5-10%, and in extreme cases, such as heavy dirt or leaf accumulation, the drop in efficiency can be as high as 25%. Regular and thorough cleaning of the panels is essential to maintain their maximum efficiency and ensure optimal energy production.
Professional cleaning methods for photovoltaic panels in Mansser
At Mansser, we use only specialised techniques to wash photovoltaic panels to ensure safety and efficiency without risking damage to delicate surfaces. We use demineralised water that does not leave streaks or lime deposits, which is key to keeping the panels clean and effective. Our teams use soft brushes and special eco-friendly cleaners that are safe for solar surfaces and the environment.
In addition, we work with telescopic systems, which makes it possible to thoroughly clean the panels even in hard-to-reach areas without having to climb onto the roof. Thanks to these methods, cleaning is not only effective, but also fast and does not interfere with normal plant operation. Regular professional cleaning of panels increases their life and efficiency, maximising energy yields.
Demineralised water - why it is the basis of safe panel cleaning
Ordinary tap water contains minerals, mainly calcium and magnesium, which dry to leave white streaks and limescale on the panels. That deposit does not just look bad: it blocks light from reaching the cells again, so the effect of cleaning quickly disappears.
Demineralised water is free of these minerals, so panels dry without streaks or deposits and the surface stays clean for much longer. That is why at Mansser we clean every solar panel installation with demineralised water technology, with no detergents that could damage the anti-reflective coating. You will also find the equipment for this method, osmotic washers and filtration systems, in our shop.
Cleaning panels on roofs, commercial buildings and PV farms
We match the cleaning method to the type of installation:
- Roofs of detached houses - we clean from the ground with telescopic poles, with no scaffolding and no risk of damaging the roof covering.
- Commercial buildings and halls - large roof-mounted installations are cleaned with higher-capacity equipment, following the rules for working at height.
- Solar farms - large-scale ground installations are handled with sets designed for the fast cleaning of hundreds of modules.
Whatever the scale, we work in the same safe demineralised water technology. For businesses and property managers we prepare ongoing service contracts with a set cleaning schedule.
Safety and working at height when cleaning solar panels
Solar panels are usually mounted on roofs or large ground structures, so cleaning them involves two hazards: working at height and the presence of a live electrical installation.
Mansser Osmo systems minimise both risks. With telescopic poles we clean panels from the ground, with no scaffolding, ladders or lifts, which removes the risk of falling. Demineralised water, unlike water with detergents, barely conducts electricity, which further improves safety when working around the modules.
A professional approach also means the right sequence of work, checking the weather (we do not clean during storms or strong wind) and equipment matched to the height of the installation. For commercial buildings and solar farms we always assess the conditions before we start.
Optimal times of the year to wash panels
when and why?
Cleaning of photovoltaic panels should be carried out at least twice a year to ensure maximum energy efficiency. The best times to perform this service are early spring and late autumn.
Early spring is the ideal time to remove dirt that has accumulated over the winter, such as dirt, road salt and plant debris. Cleaning at this time prepares the panels to take advantage of the increase in sunlight in spring and summer.
Late autumn is the time when it's a good idea to remove leaves, small branches and other debris after the summer season, which can restrict sunlight during the shorter winter days.
In addition, it is worth remembering to avoid washing the panels in full sunlight, especially in summer afternoons when the panels are very hot. Washing hot panels can damage them due to the thermal shock caused by contact with cold water. The best time of day to wash is early morning or late afternoon, when the sun is less intense.
Price list of photovoltaic panel washing services
At Mansser, we strive to offer competitive and transparent prices for PV panel cleaning that are tailored to each customer's needs and specifications. Prices depend on several factors, which include:
- Installation size: Larger installations require more time and resources, which affects the cost of the service.
- Degree of soiling: Heavily soiled panels may require more intensive and time-consuming cleaning methods.
- Accessibility: Hard-to-reach installations that require specialised cleaning equipment can increase the cost of services.
- Cleaning frequency: Regular customers who opt for recurring service contracts can enjoy preferential rates.
For example, the standard cleaning of a small installation on the roof of a single-family house starts at $750, while the comprehensive cleaning of large photovoltaic farms is priced individually after a thorough evaluation and consultation with the customer.
Feel free to contact us for details and to receive a personalized quote that best suits your needs.
Professional solar panel cleaning
Regular professional cleaning keeps your solar panels at full output and protects the modules for years. Below is how we work, how a professional service compares with doing it yourself, and why it pays off.
Dirty panels can lose 20-25% of their output. Professional cleaning with demineralised water restores efficiency, prevents hot-spots and shortens the payback time of your installation, without the risks of working at height yourself.
How we clean your solar panels, step by step
- Assessment - we check the condition of the panels and the type of dirt, then choose the right technique for the site.
- Demineralised water - we clean with demineralised water, which removes dirt with no streaks or mineral deposits and is completely safe for the modules.
- Modern tools - we use soft brushes and washers made for solar panels, plus telescopic poles that let us work safely from the ground.
- Eco-friendly approach - no aggressive detergents, which fits the idea of clean, green energy.
- Final check - we verify the result and, on request, recommend the best cleaning frequency for your site.
Professional cleaning vs doing it yourself
You can clean panels yourself, but a professional service wins on the criteria that matter. Household brushes, tap water and working at height carry real risks of scratches, streaks and injury.
| Criterion | Cleaning it yourself | Mansser (professional) |
|---|---|---|
| Effectiveness | Partial, risk of streaks and deposits | Full - demineralised water, streak-free |
| Safety | Working at height at your own risk | Trained crew, safety procedures, cleaning from the ground |
| Risk of damage | High (detergents, hard brushes) | Minimal (soft brushes, no detergents) |
| Time and effort | Significant effort | Fast, a crew with the right equipment |
Cleaning panels in winter
In winter, lingering snow and ice block daylight and cut output just when days are shortest. We remove snow safely, so the panels regain access to light without any risk of damage during snow removal.
Why choose Mansser
- Experience - a team that specialises in solar panel maintenance, with methods safe for delicate modules.
- Modern, eco-friendly equipment - demineralised water and specialised tools that remove even stubborn dirt without streaks or harsh chemicals.
- Safe work at height - the right equipment and procedures remove the risk of accidents.
- Flexible, tailored service - quick quotes and appointments that fit your schedule, matched to each installation.
Our service suits homes, businesses and solar farms alike. For equipment guidance, see our guide on choosing a solar panel cleaning brush, and for related work we also offer window and glass facade cleaning. Contact us today and ask for a quote.
Frequently asked questions about washing photovoltaic panels (FAQ)
How much does it cost to wash photovoltaic panels?
The price for washing photovoltaic panels depends on several factors, such as the number of panels, the type of dirt and access to the installation. Each quote is prepared individually to match the service to the customer's needs. Contact us for a detailed quote.
Is there a point to washing photovoltaic panels?
Yes, regular cleaning of photovoltaic panels increases their efficiency by up to 20-25%. Dirt, such as dust, soot or bird droppings, can significantly reduce the access of light to the modules, which reduces their efficiency and generates financial losses.
How to wash photovoltaic panels yourself?
To clean the panels yourself, you can use soft brushes and demineralised water, avoiding chemical detergents that can damage delicate coatings. However, it is important to remember that working at height involves risks, and self-cleaning may not be as effective as a professional service.
Can photovoltaic panels be washed by themselves?
You can, but it is not always safe or effective. Professional washing eliminates the risk of damage and provides efficiency that cannot always be achieved with home methods.
Does rain clean photovoltaic panels?
Rain can remove some of the light dirt, such as dust, but it cannot handle greasy deposits, soot or bird droppings. Therefore, regular washing of photovoltaic panels is essential to maintain their maximum efficiency.
How many times a year should photovoltaic panels be cleaned?
It is recommended to wash the panels at least twice a year - in early spring and autumn. In areas with higher air pollution, such as large cities like your area, cleaning may be necessary more often.
Should photovoltaic panels be cleaned of snow in winter?
Yes, especially in the case of heavy snowfall, which can block light from reaching the panels. Professional cleaning of photovoltaic panels from snow avoids the risk of damaging the installation during snow removal.
Is washing photovoltaic panels environmentally friendly?
Professional cleaning methods, such as the use of demineralised water and the absence of aggressive detergents, are fully ecological. As a result, your installation not only works efficiently, but also supports environmental protection.
Is it worth it to use professional panel cleaning?
Definitely yes. Professional washing of photovoltaic panels ensures maximum efficiency of the installation, protects it from damage and avoids costly repairs. It's an investment that pays for itself quickly.
Feel free to contact us
If you are looking for a reliable company that will professionally handle the cleaning of your industrial facilities, Mansser is the perfect choice. We provide comprehensive cleaning services with the highest standards of quality and safety. Contact us to learn more about our services and to schedule a free quote.
Contact us now:
- Phone: +48 515 041 976
- E-mail: kontakt@mansser.pl
Join the ranks of our satisfied customers and enjoy cleanliness at the highest level. Mansser - your partner in industrial cleaning.
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