Soiling on Solar Panels

Posted on March 24th, 2023

Solar panels are an increasingly popular source of renewable energy, providing electricity from the sun's rays. However, as they are exposed to the elements, they are susceptible to various forms of soiling. Lichen, a combination of algae and fungi, is a particularly troublesome form of soiling that can cause damage to solar panels over time.

Lichen can grow on the surface of solar panels, particularly in areas with high humidity or moisture, such as coastal regions. Lichen growth can cause solar panels to become less efficient at converting sunlight into electricity. It can also lead to increased temperatures on the surface of the panel, which can damage the solar cells over time.

Lichen absorbs moisture and retains it on the surface of the panel. This creates a layer of moisture between the panel and the surrounding air, which can reduce heat dissipation. As a result, the panel's temperature increases, which can cause damage to the solar cells.

Moreover, the lichen growth can also create shade on the surface of the panel, blocking some of the sunlight from reaching the solar cells. This reduces the overall efficiency of the panel, which can lead to a decrease in energy output over time.

Other forms of soiling, such as dust, dirt, and bird droppings, can also reduce the efficiency of solar panels by blocking sunlight from reaching the solar cells. These types of soiling can also create hot spots on the surface of the panel, which can cause damage to the solar cells.

To prevent damage from soiling, regular maintenance and cleaning of solar panels are necessary. This includes removing lichen and other types of soiling from the surface of the panel. In some cases, cleaning may be done manually with a soft-bristled brush and a mild detergent solution. In other cases, automated cleaning systems may be used to remove soiling from solar panels.

In addition to preventing damage, regular maintenance can also improve the efficiency of solar panels by ensuring that they are clean and free from soiling. This can help to maximize energy output and reduce the cost of electricity generated from solar power.