Can You Clean Solar Panels with a Pressure Washer
  1. Soft Sponges and Brushes: It’s best to use soft-bristle brushes or sponges to gently clean the surface of the solar panels. Avoid using abrasive brushes or scrubbers that can scratch the glass.
  2. Mild Detergent: Mix mild detergent with warm water to create a gentle cleaning solution. Avoid harsh chemicals.
  3. Non-Abrasive Cleaners: Use mild, non-abrasive soaps or detergents. Harsh chemicals can damage the panels or reduce their efficiency. A simple mix of water and a mild soap works well. Manual cleaning using soapy water and a garden hose is best to increase the energy production of the panels.
  4. Water: Clean water is very safe to use to clean solar panels without causing any risk. Try to avoid using hard water as it can leave mineral deposits. If possible, use distilled water to prevent any residue buildup.
  5. Rubber Squeegee: Use a soft rubber squeegee to remove excess water after cleaning. This helps to prevent water spots and streaks on the panels.
  6. Garden Hose with a Gentle Spray: Make sure to spray water gently using a hose. Using a pressure washer to clean solar panels can damage the panels and the delicate connections.
  7. Extension Pole: An extension pole can help you reach panels on roofs or high areas safely from the ground.

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  • Safety First: If the panels are on the roof, take proper safety precautions. Use a harness and ensure the ladder is secure.
  • Check the Manufacturer’s Guidelines: Always refer to the solar panel manufacturer’s cleaning recommendations for effective cleaning.
  • Clean in the Morning or Evening: Clean the panels when they are cool to avoid thermal shock or cracking. Early morning or late evening is ideal.

It’s always better to hire professionals to clean solar panels as they’ve all the necessary equipment and cleaning products and can also access higher spaces easily. Hiring professionals is the safest way to 

  1. Turn Off the System: Professionals start by turning off the solar panel system to prevent any electrical hazards.
  2. Inspect the Panels: After that, they will check the panels for any damage or heavy dirt buildup to prepare themselves for the next step.
  3. Safety First: They keep safety their first priority and wear gear like harnesses and gloves, especially if the panels are on a roof.
  4. Soft Brushes and Sponges: Generally they use soft brushes or sponges to gently clean the panels without scratching them.
  5. Mild Soapy Water: A mix of mild soap and water is used to clean the panels. No Harsh chemicals are used as they can damage the panels.
  6. Rinse with Clean Water: After cleaning panels from soapy water they rinse the panels with clean water to remove any soap residue. Most professionals use distilled water to avoid any kind of spots.
  7. Use a Squeegee: A soft rubber squeegee is used to remove excess water and prevent streaks after the cleanup.
  8. Final Check and Test: After cleaning, they check the panels again and test their performance to ensure they are working well.

It is recommended to clean your solar panels once or twice a year. However, the frequency of cleaning depends on several factors.

1. Dry and Dusty Areas: If you’re living in dry and dusty areas then you need to clean your panels more often.
2. High Pollen Areas: Clean your panels twice if there’s a lot of pollen in your area.
3. Bird Droppings:  If your panels get bird droppings often, you should clean them regularly or spot clean as needed.

Inspect your panels regularly which can help you in deciding the correct time to clean them.

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