The times in which the lotus effect should reduce the need for cleaning or make it unnecessary, probably are over. Who has a facility just a few years is not cleaned, the most convincing one look at his income account of the need.
No matter how "clean" the environmental conditions. And there are extremes. Rainwater is indeed soft, but never clean. Flush it over the surfaces, always remain residues. These deposits add up with every new rain for real money brake. Quite persistent is the dirty bird droppings and pollen. In the country, especially in farms with livestock, is also ammonia fumes, pollen and dust can be happy down whirled as sticky film of dirt. The slope of the land plays a major role. The smaller the angle of inclination of the surfaces the more cleaning is required. The power loss due to pollution are often underestimated. They amount, according to reports from the practice among 10 and 30%; are the local conditions particularly unfavorable even far more. Must be cleaned always. A decisive factor for the frequency is the local pollution behavior.
PV and solar surfaces are indeed harder than window glass, but conventional glass panes are downright rough compared to PV modules. The smooth, flat surfaces of solar thermal collectors and solar modules ensure that possible no sunbeam is broken. They consist of thermally hardened glass and are therefore well suited for wiping or brushing cleaning. Often the systems are difficult to reach because it was not meant for the construction of the accessibility for cleaning. And last but not least the risk increases with the frequency of cleaning. So there are some considerations needed to prevent damage and loss of money. Scrubber, and do-it-yourself are there no good recommendation.
If already soft rainwater does not work; normal tap water does not go. Herein all the substances are contained, you absolutely do not want to have on the area: lime and other minerals leave spots and streaks. Lime might burn under extreme conditions even in glass. Drying is also slow and thus prone to premature dusting
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Köhnke Dienstleistungen GmbH
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