How Often Should Solar Panels Be Cleaned?

Jul 19, '23

Solar worker cleaning photovoltaic panels with a brush

Are you a proud owner of solar panels, harnessing the power of the sun to generate clean energy? If so, you might be wondering how often you should clean your solar panels to maintain their optimal performance. 

Regular cleaning is crucial to ensure that your solar panels continue to generate electricity efficiently. While the cleaning frequency of solar panels depends on several factors, including your climate, location, and environmental conditions, a general guideline is to clean them at least once or twice a year.

However, certain regions with high dust, pollen, or air pollution levels may require more frequent cleaning. Let's see how that could be done. 

  • Do Solar Panels Need To Be Cleaned Regularly?
  • Why Should I Clean My Solar Panels?
  • Check Dust Build-Up And Debris Weekly
  • How Often Should My Solar Panels Be Cleaned?
  • Does Cleaning Solar Panels Make A Difference?
  • How Do I Know If My Solar Panels Need Cleaning?
  • Conclusion
  • FAQs
  • Do Solar Panels Need To Be Cleaned Regularly?

    Yes. Solar panels can be cleaned regularly to ensure optimal performance and longevity. But neglecting this essential maintenance task could lead to this:

    Reduced Energy Output: Dirt, dust, and other debris on the surface of solar panels obstruct sunlight absorption, resulting in decreased energy production.

    Studies have revealed that dirty solar panels can experience a significant drop in efficiency, with some reports suggesting reductions of up to 25%. Over time, this reduction in energy output can lead to a substantial loss of potential electricity generation.

    Financial Implications: Reduced energy output directly affects your solar panel system's financial returns. If your solar panels are not cleaned consistently, you may experience a decrease in the amount of electricity generated. This could result in lower energy bill savings or a longer payback period for your initial investment. 

    Potential Long-Term Damage: Failure to clean solar panels can lead to more extreme damage over time. For instance, accumulated debris, such as leaves and twigs, can create hotspots on the panels, causing them to overheat. This excessive heat can affect the structural integrity of the panels and lead to cracks or other irreversible damage. 

    Why Should I Clean My Solar Panels?

    Solar panels accumulated with dirt and dust

    The compelling reasons you should clean your solar panels go beyond the surface to explore the impact of dirt, pollution, and even rain on their efficiency and lifespan.

    1. Dirty Solar Panels Are Less Efficient: The accumulation of dirt, dust, leaves, and other debris on the surface of solar panels is an obstacle between the sunlight and the photovoltaic cells. This obstruction prevents the panels from absorbing sunlight effectively, reducing energy production. 
    1. Dirt & Pollution Can Destroy Solar Cells: Beyond the impact on energy production, dirt, and pollution can pose long-term threats to the health of your solar cells. Small particles in the air, such as soot, pollen, and industrial pollutants, can settle on the panels and cause chemical reactions or create micro-scratches on the surface.
    Over time, these reactions and scratches can lead to the degradation of solar cells, reducing solar efficiency and lifespan. 
      1. Rain Is Not Enough To Wash Solar Panels: One common misconception is that rain alone is sufficient to clean solar panels. While rainwater can help wash away some light dirt and dust, it is not a comprehensive cleaning solution.

      Rainwater itself may contain contaminants, and as the water evaporates, mineral deposits can be left behind, creating a thin film on the panels. This residue can obstruct sunlight and reduce energy production. 

        1. Maintenance for Optimal Performance and Longevity:By dedicating time and effort to keep your panels clean, you actively preserve their efficiency and prolong their lifespan. Clean panels generate more electricity and contribute to a more sustainable and eco-friendly energy production process. 

        Check Dust Build-Up And Debris Weekly

        A man gently wiping and cleaning BougeRV CIGS flexible solar panel using a soft cloth

        Begin by visually inspecting your solar panels for any visible signs of dust, dirt, or debris. Look for dark spots, streaks, or unusual patterns that may indicate the presence of contaminants. A thorough visual inspection will help you identify areas that require cleaning. 

        Gently sweep the surface of the solar panels using a soft broom or brush to remove loose dust and debris. Ensure the broom or brush is clean and free from any abrasive particles that could scratch the panels. Exercise caution to avoid applying excessive pressure that might damage the panels.

        How Often Should My Solar Panels Be Cleaned?

        The location of your solar panels plays a significant role in determining their cleaning needs. More frequent cleaning may be necessary if you live in an area prone to high dust, pollen, or air pollution (1-2 times a year). 

        Likewise, regions with frequent rain showers may experience cleaner panels than drier regions with more dust accumulation (2-3 times a year). Assess the specific environmental conditions in your area to gauge the impact on your panels' cleanliness.

        Does Cleaning Solar Panels Make A Difference?

        A woman cleaning BougeRV CIGS flexible RV solar panels with a hose

        Yes, cleaning solar panels does make a significant difference in their performance and energy output. Removing accumulated dirt, dust, and debris allows more sunlight to reach the solar cells, maximizing their efficiency.

        Scientific research has shown that regular cleaning can result in a considerable increase in energy production. Additionally, maintaining clean solar panels ensures their long-term durability and effectiveness.

        How Do I Know If My Solar Panels Need Cleaning?

        The key signs that indicate your solar panels require cleaning help you identify when it's time to take action and maintain the performance of your solar panel system. Signs That Your Solar Panels Need Cleaning:

        • Decreased Energy Production: If you notice a significant reduction in energy production from your solar panels, it might be a sign that they require cleaning. Reduced energy output can be attributed to dirt, dust, or other obstructions on the panel surface that hinder sunlight absorption.
        • Noticeable Debris: Check for any noticeable debris, such as leaves, twigs, or other foreign objects that have settled on the panels. Debris can block sunlight and impact performance.
        • Nearby Construction or Renovation: If there is ongoing construction or renovation activity near your solar panel system, it can lead to an increased presence of dust, debris, and airborne particles. Such conditions may require more frequent cleaning than usual to prevent accumulation and maintain optimal performance.
        • Proximity to Trees or Foliage: If trees or shrubs surround your solar panels, you may need to clean them more often to ensure unimpeded sunlight absorption.


        Determining how often solar panels should be cleaned depends on various factors such as location, climate, and environmental conditions. While a general guideline suggests cleaning them once or twice a year, specific situations may require more frequent cleaning. 

        Regular cleaning is essential for maximizing energy production, preserving efficiency, and preventing potential damage. Thus, go check your solar panels and see if they need cleaning! 

        Would like to explore more about solar panels things? BougeRV provides quality and efficient 9BB solar panels, CIGS thin-film solar panels, and portable solar blankets as well as solar devices for outdoor and indoor use. Get inspired by BougeRV now! 


        1. Should I clean my solar panels?

        Yes, it is important to clean your solar panels. Regular cleaning helps maintain their efficiency and maximize energy production. Dirt, leaves, bird droppings, and other debris can accumulate on the surface of solar panels, reducing sunlight absorption and reducing their performance. 

        By cleaning your panels, you remove these obstructions and ensure optimal sunlight capture, thereby maximizing energy harness and the financial benefits of your solar panel system.

        2. Is solar cleaning worth it?

        Yes, solar cleaning is worth it. Regularly cleaning solar panels is essential for maintaining high efficiency and maximizing energy production. 

        3. Do solar panels need annual cleaning?

        Yes, Solar panels generally benefit from annual cleaning. However, the cleaning frequency may vary depending on factors such as location, climate, and environmental conditions. A general guideline suggests cleaning them at least once or twice a year. 

        4. What time of year should you clean solar panels?

        Solar panels can be cleaned throughout the year. Still, the timing of cleaning can vary based on personal preference and regional factors. It is often recommended to clean solar panels during the spring or early summer when the weather is mild, and there is less chance of freezing temperatures or snow. 

        However, suppose your panels require cleaning due to significant dirt or debris accumulation. In that case, it is advisable to clean them as soon as possible, regardless of the season.

        5. Can you walk on solar panels to clean them?

        We don’t recommend walking on solar panels unless you have received proper training and have the necessary expertise. Most silicon rigid solar panels are vulnerable to damage by excessive weight or improper handling. 

        If cleaning this kind of solar panel requires physical access, it is best to consult an experienced solar panel cleaner with the appropriate equipment and expertise to perform the task safely without causing any harm to the panels.

        6. How much does it cost to clean solar panels?

        The cost of cleaning solar panels can rely on several aspects, such as the size of the system, the number of panels, the accessibility of the installation, and the cleaning service provider. On average, professional solar panel cleaning services can cost between $100 to $300, but prices may vary. 

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