On December 22nd we took the enterprising step of installing a photo voltaic system manufactured by ALWITRA GmbH & Co, Trier. The installation was performed by HOLL Flachdachbau GmbH & Co, Geesthacht.
The special panels are integrated in a synthetic roofing membrane. With a performance of 44.5 kWp / 36.5 kWh it has a surface area of approx. 1500 m2. The yield is clearly lower than from the known glass panels. However for these the costs would have been much higher due to static reasons of the roof.
The installation will prove profitable in spite of the initial financial requirement of € 300.000. It is calculated basing on a subsidized sales price, that we will have an interest rate of more than 4 % for our equity we investet into this project.

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