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    Maintenance Guide: The Right Way to Clean Solar System

    • 6 min read

    Dust and dirt buildup can significantly impact the efficiency and longevity of your solar panels. A clean solar system not only ensures maximum energy production but also contributes to the sustainability of this renewable energy source. Fortunately, cleaning them is not as complicated as some would think.

    This guide delves into the right ways to maintain and clean your solar system, covering the essential benefits of keeping it spotless, how often cleaning should be conducted, different solar system cleaning options. Whether you're contemplating hiring professionals or taking on the task yourself, we've got you covered with practical advice to guide you through the process.

    Benefits and Necessity of Clean Solar Systems

    Maintaining a clean solar system, be it a compact balcony power plant or a large rooftop solar system, is a necessity to maximize their energy output and ensure the longevity of your solar investment. Here are the key benefits of regular cleaning:

    • Maximized Energy Efficiency:Dirt, dust, bird droppings, and leaves can obstruct sunlight from reaching the solar cells, reducing the system's ability to generate power. Even a thin layer of grime can lead to a noticeable decline in energy production. The Anker SOLIX Balcony Power Plant, for instance, features a remarkable efficiency rate of 25%. Regular cleaning ensures your panels operate at this peak efficiency, harnessing as much solar energy as possible.
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    • Extended Panel Lifespan:Solar panels are designed to last for 25 to 30 years or more. However, without proper maintenance, their lifespan can be significantly shortened. Debris and dirt accumulation not only reduces efficiency but can also cause physical damage to the panels over time. By keeping your solar system clean, you're also safeguarding its future usability.
    • Cost Savings in the Long Run:The initial cost of installing a solar system can be substantial, but the return on investment is highly dependent on the system's efficiency. A clean solar system ensures that you are getting the maximum return on your investment by generating more electricity, which can significantly reduce your electricity bills and, in some cases, even result in earnings through feed-in tariffs.

    How Often Should Solar Systems Be Cleaned?

    While there's no one-size-fits-all answer, understanding the factors that influence how often you should clean your solar panels can ensure they continue to operate at peak efficiency.

    • Local Environment:Areas with high dust levels, frequent bird droppings, or heavy pollen can necessitate more frequent cleanings. Similarly, if you live in a region that receives a lot of snowfall, you'll need to clear off the snow to keep your panels functioning during the winter months.
    • Rainfall:Moderate to heavy rainfall can naturally clean your panels, reducing the need for manual cleaning. However, if you're in an area with minimal rainfall or where rainwater tends to leave behind dirt or mineral deposits, you'll need to clean your panels more regularly.
    • Angle of Installation:Solar panels installed at a steeper angle tend to stay cleaner, as debris is more likely to slide off. Conversely, panels installed at a shallow angle can accumulate dirt more quickly, requiring more frequent cleaning to maintain their efficiency.

    With these factors in mind, a general guideline is to inspect and potentially clean your solar panels at least twice a year. However, monitoring your solar system's energy output can offer more precise cues for cleaning. A noticeable drop in performance often indicates that it's time to clean your panels.

    For instance, many modern solar systems, such as the Anker SOLIX Balcony Power Plant with Storage, are equipped with monitoring tools or apps that allow you to track their energy production in real-time. Leverage these tools to notice a substantial decrease in energy output, which can serve as a prompt indication that it's time to clean the panels.

    Ways to Clean Solar Systems

    When it comes to cleaning your solar systems, you can either clean it by yourself or hire professionals. Here's a look at both approaches to help you decide the best way to maintain your solar investment.

    Hire a Professional for Cleaning

    Professional solar cleaning services offer expertise and experience, ensuring your system is cleaned safely and effectively. They come equipped with the right tools and cleaning solutions that won't harm the solar panels or your roof. Hiring professionals is particularly advisable if:

    • Your system is difficult to access:Rooftop installations or systems placed in hard-to-reach areas can pose a safety risk for untrained individuals.
    • You prefer a comprehensive maintenance check:Professionals not only clean but can also inspect your system for any potential issues, offering peace of mind.
    • You have a large or commercial system:Larger installations can be more challenging and time-consuming to clean properly without professional help.

    Clean the Solar System Yourself

    For those who prefer the DIY approach, cleaning your solar panels can be a straightforward task if done carefully. This hands-on strategy is especially fitting for owners of smaller setups, such as a balcony power plant with storage. Here's how you can safely clean your system:

    1. Before you start, ensure that you have all the necessary safety equipment, especially if your panels are installed on a roof. Use a sturdy ladder, wear non-slip shoes, and consider using a harness or rope for added safety.
    2. For safety and to prevent any electrical issues, turn off your solar system before cleaning.
    3. Begin with a soft brush or a leaf blower to remove loose debris and dust from the surface of the panels. It's important to do this gently to avoid scratching the panels.
    4. Mix a mild, non-abrasive soap with water in a bucket. Avoid using harsh chemicals as they can damage the panel's surface or leave a residue that could affect performance.
    5. Use a soft cloth or a sponge to apply the soapy water to the panels. If your system is large, you might want to use a long-handled squeegee or brush to reach all areas.
    6. Gently scrub the panels to remove any stubborn grime or dirt. Do not use abrasive pads or scrubbers as they can scratch the glass and reduce the panel's efficiency.
    7. Thoroughly rinse the panels with clean water to remove any soap residue. If you leave soap on the panels, it can attract more dirt or interfere with the panel's ability to absorb sunlight.
    8. While air drying is generally recommended, you can gently dry the panels with a soft, clean cloth to avoid water spots, especially in areas with hard water.
    9. Once the panels are clean and dry, do a final inspection to ensure there's no residue or missed spots. Turn your system back on and check that it's functioning correctly.

    Practical Tips on Cleaning Methods

    When you choose to clean your solar system yourself, here are some practical tips you should keep in mind:

    • Safety First:Ensure that you can safely reach your panels. Use a sturdy ladder, and if your roof is steep or high, consider safety harnesses. It's also important to shut down the system before cleaning.
    • Choose the Right Time:Clean your panels during the early morning or late afternoon to avoid hot sun that can quickly dry soap or water, leaving smears. Overcast days are also suitable.
    • Use the Right Equipment:A soft brush or a squeegee attached to a long extension pole, coupled with a hose that can spray deionized water, is ideal. Avoid high-pressure water jets that can damage the panel's surface.
    • Avoid Harsh Chemicals:Use mild, soapy water, if necessary, but plain water is often sufficient. Harsh chemicals can damage the panel's surface or leave behind residue.
    • Soft Approach:Always use gentle pressure to avoid scratching the solar panels, which can affect their performance.


    As we've explored, regular cleaning not only enhances the efficiency of your solar panels but also extends their lifespan. Whether you choose to enlist the services of a professional cleaner or embrace the DIY spirit, the importance of a clean solar system cannot be overstated. We've armed you with the knowledge on how often to clean, the various ways to go about it, and practical tips to make the process as efficient and effective as possible. By embracing the maintenance tips outlined in this guide, you can safeguard your investment and ensure the longevity and efficiency of your renewable energy source.


    Does pollution reduce the yield of solar systems?

    Yes, pollution can significantly reduce the yield of solar systems. Dust, soot, bird droppings, and other pollutants can form a layer on the solar panels, blocking sunlight and decreasing their efficiency. Over time, this accumulation can lead to a noticeable drop in the amount of electricity your system generates. Regular cleaning is crucial to maintain optimal performance and ensure your solar investment pays off.

    How much does it cost for a professional to clean a PV system?

    On average, professional cleaning services for PV systems may charge between €1 and €3 per square meter. For a 50 square meter PV system, this would be €50 to €150. The cost can vary depending on the size and accessibility of the system and the complexity of the cleaning required.

    Does the solar system need to be cleaned in rainy or snowy weather?

    In rainy or snowy weather, your solar system might not require as frequent cleaning. Rain can help wash away some of the dirt and debris. However, it's not a complete substitute for cleaning. Snow, especially, can cover panels entirely, blocking sunlight and reducing your system's output. After heavy snowfall, it's important to gently remove the snow from your panels.