The average calculation provides an alleged funding of the system in about 12 years. However, the calculation is mostly made without achievement loss by soiling. Unfortunately, long-term seen this calculation can not be transformed in the reality! Increasing air pollution and environmental influences, ventilation and extractor fireplaces in agriculture or plants near industrial areas have meant that sooner or later a cleaning will be essential to maintain the achievement values.
Why cleaning ?
Experience has shown that any affected soil deposition (light filter layers) the efficiency of your PV system, thus reducing your electricity supply. Many PV system operators believe in that the natural change in the weather keeps impurities from your modules.
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