Residential Rooftop Mehring

Site Overview
Location Mehring, Germany
Coordinates 49.48° N, 6.50° E
Average global irradiance 1,250 kWh/m2/yr
Average temperature 9.5 °C, 49.1 °F
Average precipitation 788 mm/yr, 31.0 in/yr
Technical Overview
Date onstream December 2011
System capacity 8.4 kWp
Panel type SF150-L (150 W)
Number of installed panels 56
Titl angle, orientation 20°, 70° W
Expected output 7,107 kWh/yr
Total CO2-reduction 5,594 kg/yr, 12,333 lbs/yr
Inverter 6 x Sunny Boy 1200
Financing Bank
Private Investment

Schirra Solar Consulting GmbH, located in Wasserburg on Lake Constance, is a professional solar energy partner particularly for small and mediumsized crafts enterprises. Founded in 2009, Schirra Solar plans and installs turnkey solar systems.

Schirra Consulting GmbH has several sales offices and collaborates with a number of other solar energy specialist firms.

In December 2011, a roof-mounted solar installation with 56 Solar Frontier 150 Watt CIS thin-film modules was installed by the master roofing company Tobias Weber and was connected to the grid on a private barrel-shaped rooftop in Mehring, in the Rhineland-Palatinate. For this special shape of rooftop with its variable tilt angles, planning and technical expertise are of high importance. The rooftop installation has a total installed capacity of 8.4 kWp and is expected to produce 7,107 kWh and saving about five tons of CO2 annually.

The challenge of this installation is to produce high yield even if there is often fog during the morning hours due to the proximity to the river Mosel. Solar Frontier CIS thin-film modules were found to perform better than other technologies because of their low light behaviour. In addition to the high efficiency of the modules under low angle irradiation on west aligned rooftops, the aesthetic design of the lead- and cadmium free modules were also compelling factors. The modules´ homogeneous black design enhances the special style of the roof, too.