To refinance a photovoltaic system through the feed-in remuneration within the average of 12 years, the feed-in values which have been taken as a basis for the calculation need to stay approximately the same.
But what if dirt particles – due to environmental influences and air pollution – accumulate on and burn in the photovoltaic system?
Even if the layers of air filter caused by dirt particles cannot be seen with the naked eye, the efficiency of your system is hindered and the electricity feed, thus feed-in remuneration, is reduced. Losses of around 3 % – 20 % per year (depending on the type of use of the building) are with increasing tendency no rarity.
To be able to sustain the feed-in values and thus the refinancing of the system, a cleaning of the modules is compulsorily needed.
The cleaning costs for your photovoltaic system are tax-deductible as such systems are operated commercially.