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Module cleaning of photovoltaic systems

Module cleaning ensures efficiency of solar modules


PV systems are exposed to varying weather conditions all around the clock. Depending on the immediate surroundings, it is not just about the impact of weather, but also about air pollution caused by road traffic. Further contamination is caused by leaves, moss or bird droppings. However, to ensure consistent efficiency of a solar system for a longer period of time, occasional cleaning of the individual modules is necessary.

Natural module cleaning due to heavy rainfall or snowfall is often insufficient: stubborn dirt and soiling in hard-to-reach areas such as the module edges often remain unaffected and must be removed manually.

When do I need a module cleaning?


For the plant operator, module cleaning is first and foremost an economic decision: cleaning only pays off if the yield loss of the plant is higher than the cleaning costs. According to statistics, plant yields can be increased by two to seven percent depending on the location.

How to clean solar modules


In order to avoid damaging the modules, only experts should carry out the cleaning of PV systems. Instead of high-pressure cleaners, soft brushes or sponges should be used to not damage the glass of the modules or frames. Only mild, non-abrasive cleaning agents should be used. If manufacturers‘ recommendations are neglected, the equipment can be damaged and warranty problems could arise.

To avoid any inconvenience in module cleaning, plant operators should contact specialised service providers. Depending on whether it is a roof-mounted installation or an open-space installation, various cleaning methods are used. The following methods are to be distinguished: mobile solutions such as telescopic rods with brushes or movable systems with rotating brushes, as well as cleaning robots.

SENS module cleaning


From open-space installations to PV rooftop systems: the service team of STEAG Solar Energy Solutions offers long-standing experience in the field of plant maintenance. These include, among other things, module cleaning, green waste as well as status inspections and repair of damages of course. SENS assures the best-possible performance of your plant through individual services – all at a global level.