Commercial Rooftop Bottrop

Site Overview
Location Bottrop, Germany
Coordinates 51.52° N, 6.92° E
Average global irradiance 950-1,000 kWh/m2/yr
Average temperature 9.6 °C, 49.3 °F
Average precipitation 930 mm/yr, 36.6 in/yr
Technical Overview
Date onstream November 2011
System capacity 42.75 kWp
Panel type SF150-L (150 W)
Number of installed panels 285
Tilt angle, orientation 12°, 0° S
Expected output 37,433 kWh/yr
Total CO2-reduction 33,165 kg/yr, 73,116 lbs/yr
Inverter 2x Danfoss TLX 12,5 Pro + 2x Danfoss TLX 10,0 Pro +
Financing Bank
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MHH Solartechnik is a pioneer in photovoltaic systems with over 20 years of market experience. The company has developed into one of the largest photovoltaic system suppliers in Germany and is able to provide local and personal support to customers nationwide with over 100 employees. The company´s head office is located in Tübingen and with sales offices in Munich, Nuremberg, Braunschweig and Duisburg. With deep experience working with suppliers and customers at every level of the solar value chain, MHH is a professional partner from the planning stage to turnkey solar systems.

The MHH customer Elektro Schrey GmbH installs superior quality and highly customized solar installations, mainly in the range of up to 50 kWp. Managing Director of Electro Schrey GmbH, Stefan Stamm attaches great importance to the use of high-quality modules and well-known inverter manufacturers.

In November 2011, a commercially used roof-mounted solar installation with Solar Frontier CIS thin-film modules was connected to the grid on a storehouse in Bottrop, in the Ruhr area. The 285 installed CIS modules are efficient and economical at the same time and have a total installed capacity of 42.75 kWp. The rooftop installation is expected to produce 37,433 kWh, and reduce CO2 emission by 33,165 kg per year.

The challenge of this installation was to compensate for the low tilt angle of only 12° and also for partial shadowing during the afternoon hours. Even under these conditions, considered to be suboptimal, Solar Frontier´s CIS thin-film modules perform better than other technologies because of their high shadow tolerance. In addition to the high efficiency of the modules even under partial shadowing and low-light conditions, the lead and cadmium free content were also compelling factors.