Solar Energy

Does Cleaning Solar Panels Make a Difference?

Solar panels are a great way to generate renewable energy and reduce your carbon footprint. However, over time, they can accumulate dirt, dust, and other debris, which can reduce their efficiency. This raises the question: does cleaning solar panels make a difference?

The short answer is yes, cleaning solar panels can make a difference in their performance. Studies have shown that dirty solar panels can lose up to 25% of their efficiency, which means they produce less electricity. This is because the dirt and debris on the panels can block sunlight from reaching the solar cells, reducing their ability to convert sunlight into electricity.

What is PV Soiling

PV soiling refers to the accumulation of dirt, dust, or other debris on the surface of a solar panel, which reduces its ability to generate electricity. This is a common problem, particularly in dusty or dry areas, and can significantly impact the efficiency of a solar energy system.

Cleaning Solar Panels to Curb PV Soiling

In order to maximize energy production, it is important to regularly clean solar panels and keep them free from any obstructions that may impede the absorption of sunlight. There are various methods for cleaning solar panels, including using specialized equipment or cleaning agents, or simply using water and a soft brush.

Solar Panel Cleaning

So, if you want your solar panels to perform at their best, regular cleaning is recommended. But how often should you clean them? The frequency of cleaning depends on a variety of factors, including where you live, the climate, and the angle of your panels. For example, if you live in an area with a lot of dust or pollution, you may need to clean your panels more often than if you live in a clean, rural area. But generally two to three times a year is usually fine for less dusty areas and regions.

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Another factor to consider is the angle of your panels. If your panels are installed at a steep angle, they may be more self-cleaning, as rainwater can wash away dirt and debris. However, if your panels are installed at a shallow angle, they may require more frequent cleaning, as rainwater may not be able to wash away all the dirt and debris.

Quick Points: Factors that Determine how Dirty your Solar Panels will be (PV Soiling)

Below are some factors that determine how dirty your solar panels will be (PV Soiling).

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Location: The location of your solar panels plays a significant role in determining how dirty they will be. If you live in a dusty or polluted area, your solar panels are more likely to accumulate dirt and debris faster than those in cleaner areas. Similarly, if you live in an area with frequent rain, your solar panels may not get as dirty as those in areas with less rainfall.

Angle: The angle of your solar panels also affects how dirty they will get. If your panels are installed at a steep angle, they are less likely to accumulate dirt and debris compared to those installed at a shallow angle. This is because rainwater is more likely to wash away dirt and debris on panels installed at a steep angle.

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Surrounding environment: The environment surrounding your solar panels also plays a role in determining how dirty they will be. If your panels are surrounded by trees or other plants, they may accumulate leaves, pollen, and other debris, which can increase the rate of soiling. Similarly, if your panels are near a construction site, they may accumulate dust and debris from the construction process.

Maintenance: Finally, how often you clean your solar panels will also affect how dirty they get. If you clean your solar panels regularly, they will be less likely to accumulate dirt and debris. On the other hand, if you neglect cleaning your solar panels, they will get dirtier faster, reducing their energy efficiency.

PV soiling is a natural process that occurs as your solar panels are exposed to the elements. However, by understanding the factors that determine how dirty your solar panels will be, you can take steps to minimize the rate of soiling, ensuring that your solar panels remain efficient and generate renewable energy for many years to come.

How to Clean Solar Panels

When it comes to cleaning your solar panels, there are several methods you can use. One option is to hire a professional to clean them for you. This can be a good choice if you have a large array of panels or if you don’t feel comfortable climbing onto your roof.

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Alternatively, you can clean your solar panels yourself. To do this, you’ll need a few basic supplies, including a soft brush, a bucket of soapy water, and a squeegee. Start by brushing away any loose dirt and debris, then use the soapy water to gently scrub the panels. Finally, use the squeegee to remove the water and leave the panels to dry.

Does Cleaning Solar Panels Make a Difference?
Does Cleaning Solar Panels Make a Difference?


Cleaning your solar panels can make a significant difference in their performance. By keeping them free of dirt and debris, you can ensure that they are operating at their maximum efficiency, which means you’ll be generating more renewable energy and saving money on your electricity bills. So, whether you choose to clean them yourself or hire a professional, regular cleaning is an essential part of maintaining your solar panel system.



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Simon Tyrus Caine

Simon Tyrus Caine is a solar energy expert with more than 10 years experience in the solar sector. Simon has worked and lived in more than 5 countries. Simon has been involved in solar installations, solar project development, solar financing as well as business development in the solar sector. At SolarEyes International, Simon manages content development and day to day operations of the organisation.

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