top of page

How To Clean Solar Panels The Right Way


Harnessing solar energy is a splendid way to reduce your carbon footprint and cut down on utility bills. However, to ensure your solar panels function at their peak efficiency, regular cleaning is essential. Accumulated dust, bird droppings, and leaves can significantly impact their performance. Here's a step-by-step guide on how to keep your solar panels sparkling clean.

Understanding the Importance

Before diving into the cleaning process, it's crucial to comprehend why keeping solar panels clean is paramount. Solar panels work by allowing photons from sunlight to knock electrons free from atoms, generating a flow of electricity. When the panels are dirty, they can't capture sunlight efficiently, leading to a decrease in energy production.

Step 1: Safety First

Always prioritise safety. If your solar panels are installed on your roof, consider hiring professionals, especially if you're not comfortable working at heights. If you do choose to do it yourself, use a sturdy ladder and wear non-slip shoes.

Step 2: Choose the Right Time

Early morning or late afternoon is the best time for cleaning. The panels are usually cooler during these times, preventing any damage that could be caused by cold water hitting hot panels.

Step 3: Initial Inspection

Before cleaning, inspect your panels for any damage. If you find cracks or any other significant damage, it's best to call in the professionals.

Step 4: Gentle Cleaning

Use a soft brush or a non-abrasive sponge to gently remove loose debris. Avoid using metal tools or harsh scrubbing materials as they can scratch the surface of the panels.

Step 5: Washing

Use a hose to lightly spray the panels with water. If the panels are particularly dirty, you can use mild, soapy water. Be sure to use a biodegradable soap to avoid any environmental harm. Gently scrub the panels with your soft brush or sponge.

Step 6: Rinsing Off

Thoroughly rinse the panels with clean water to remove any soap residue. Leftover soap can leave streaks and may even attract more dirt.

Step 7: Drying

Allow the panels to air dry. Avoid using abrasive towels or cloths as they might leave scratches.

Step 8: Regular Monitoring

Regularly check your panels and clean them every few months or as needed. If you live in an area that's particularly dusty or prone to bird droppings, you might need to clean them more frequently.


Keeping your solar panels clean is not just about maintaining their appearance; it's about ensuring their efficiency and longevity. With these simple steps, you can keep your solar energy system functioning optimally for years to come. Remember, if you're ever in doubt or find the task too daunting, it's always wise to call in professional cleaners. Let the sun shine on your clean, efficient solar panels!

FAQs: How To Clean Solar Panels

Q: Can I use a pressure washer to clean my solar panels?

A: It's best to avoid using a pressure washer as the force can damage the panels. Stick to a standard garden hose.

Q: How often should I clean my solar panels?

A: Generally, cleaning them every 6 months is sufficient, but this can vary depending on your local environment.

Q: Do dirty solar panels really affect performance?

A: Yes, dirt and debris can block sunlight and reduce the efficiency of your solar panels significantly.

Q: Can rainwater clean solar panels effectively?

A: While rain can help wash away some surface dirt, it's often not enough to clean the panels thoroughly. Bird droppings, pollen, and more stubborn dirt require manual cleaning.

Q: Is it necessary to turn off the solar panels before cleaning?

A: It's a good practice to turn off the solar system before cleaning for safety reasons, especially if you're using water.

Q: Can I use automated cleaning systems for solar panels?

A: Yes, there are automated cleaning systems available that can be installed to regularly clean the panels. These are especially useful for large installations or hard-to-reach areas.

Q: What should I do if I notice damage during cleaning?

A: If you find any damage, such as cracks or loose connections, it's best to stop cleaning and contact a professional for repairs.

Q: Are there any specific cleaning products I should use?

A: Use mild, biodegradable soap if necessary. Avoid harsh chemicals or abrasive cleaners as they can damage the panels.

Q: How do I clean rooftop solar panels without climbing on the roof?

A: You can use a long-handled brush or a hose with a suitable extension to reach the panels from the ground. If this isn't feasible, consider hiring a professional cleaning service.

Q: Will cleaning my solar panels void the warranty?

A: Generally, routine cleaning won’t void the warranty. However, it’s important to check your specific warranty terms and follow the manufacturer’s guidelines.

Q: Can hard water affect solar panels?

A: Yes, using hard water can leave mineral deposits on the panels. If possible, use softened or deionised water for cleaning to avoid this issue.

Q: Is it safe to clean solar panels during the winter?

A: Yes, but be extra cautious as the panels and roof can be slippery. If there's snow, it often melts and slides off the smooth surface of the panels, so you may not need to clean them as frequently.

Q: Can I clean solar panels with a robot?

A: Some advanced robotic cleaning systems are designed specifically for solar panels, especially in large-scale solar farms. These can be an effective, albeit more expensive, option.


bottom of page