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How and when do solar panels need to be washed?

The washing of solar thermal or photovoltaic panels is one of the most important aspects to maintain the entire system in good condition.

Solar panel industry is one of the fastest growing sectors in the world. This is happening thanks to the numerous advantages that solar panels offer, such as the reduction in the use of fossil fuel and energy savings. However, solar panels can get dirty and be covered with debris, that reduce their efficacy. In this article we will explain how and when solar panels need to be washed in order to keep them always in good condition.

How to wash solar panels?

Washing solar panels always represents a delicate activity.

If solar panels are dirty, they produce a low level of energy. For this reason, it is important to keep them clean. How do solar panels have to be washed? And how frequently?

Here are a few tips that you should follow when washing your solar panels:

  1. Use the right products: when cleaning solar panels, it is important not to use products that can damage their surface. Choose the products that have been specifically designed for solar panels.
  2. Be careful with high-pressure cleaners: these machines can be too powerful and damage solar panels. If you use a high-pressure cleaner, you must use cold water with a low pressure value and place it 30 cm away from the surface.
  3. Clean them regularly: solar panels must be cleaned at least once a year, or more frequently if they are placed in a dirty or dusty environment. If you live in a place with many trees, it could be necessary to wash them more frequently because leaves or bird droppings can cause long-term damages if not removed quickly.

How often do solar panels need to be washed?

Solar panels must be cleaned when are dirty according to their position, and for this reason it could happen more or less frequently. If solar panels are placed in a dusty environment, near trees or in an area that is densely populated by birds, they have to be washed more frequently. Basically, the washing of solar panels should be done at least once a year.

The best brushes to wash solar panels

Favagrossa’s brushes are the ideal solution for an efficient washing of solar panels. For this reason, the most important companies of this sector, in Europe and in the world, rely on the expertise of Favagrossa and the quality of its products, especially CARLITE brushes.

Thanks to their high cleaning power and their unmatched delicacy on painted surfaces, CARLITE brushes are the ideal choice for the washing of solar panels. They can be customized using different colours, dimensions and density of the bristles and can adapt to every type of car washing system.

Contact us to receive an estimate for CARLITE brushes or for other customized solutions!


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