Pollen can have a measurable impact on the efficiency of solar modules, especially in times of high pollen levels such as spring. At first glance, pollen may seem harmless. However, depending on its intensity, it can cause between 2 % and 10 % of efficiency loss in solar modules.
If pollen forms a fine film on the surface of solar modules, the light transmission of the glass cover can be reduced. The sunlight is thus partially absorbed or scattered before it reaches the solar cells. Depending on the intensity of the soiling, the yield loss can be several percent.
If pollen is not evenly distributed on the modules, e.g. due to wind, rain or sticking in corners, so-called hotspots can occur. These areas heat up more, which can damage the modules in the long term and lead to a premature loss of performance. In combination with humidity or light rain, pollen forms a greasy layer that is particularly stubborn and cannot simply be rinsed off. This allows more particles to stick, which in turn reduces performance. If the pollen is not removed, it can also combine with other soiling, e.g. dust, exhaust residue or bird droppings, to form a permanent film of dirt. This not only impairs efficiency, but also shortens the service life of the modules.
Solar modules should be visually inspected regularly, especially in spring. This is particularly important if the modules are located near deciduous trees. In addition to pollen, trees such as lime trees also release a viscous, sticky liquid that is difficult to remove.
Pollen should be removed by cleaning
Pollen should therefore be removed by manual or professional cleaning. Emil Otto's innovative and gentle cleaning agents have been specially developed for the requirements of the solar industry and are therefore ideal for cleaning photovoltaic systems, PV modules and solar roofs.