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Backnang Residential Rooftop

Europe Residential

  • Location:Backnang, Germany
  • Date onstream:2010-11
  • System Capacity:9.6 kWp

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Gerhard Prinz and Christian Görtz
Managing Directors
Prinz Energie- und Umwelttechnik GmbH

Our installations with Solar Frontier CIS modules show excellent output in kilowatt hours per kilowatt peak. They use ecological technology that is cadmium and lead free, and have a uniform, black design. We intend to install them in an entire residential area and are looking forward to strong cooperation with Solar Frontier.

Site Overview

Coordinates 48.95° N, 9.43° E
Average Global Irradiance 1,079 kWh/m²/yr
Average Temperature 7.9 °C ・ 46.2 °F
Average Precipitation 1,044 mm ・ 41.1 in/yr Average Precipitation 1,044 mm ・ 41.1 in/yr

Technical Overview

Panel Type SF85-EX-B (85 W)
Number of panels installed 113
Panel angle and Orientation 38°, South 0°
Output 5,490 kWh (AC)
CO2 reduction 3,840 kg ・ 8,467 lbs

Residential Rooftop, Backnang

The Solar Frontier CIS panels installed on this roof offer more kilowatt hours per kilowatt peak than other crystalline systems in the area.


Prinz Energie- und Umwelttechnik GmbH designs and builds rooftop and ground-mounted photovoltaic and solar thermal systems. The company also sells PV modules, inverters and mounting systems.


This residential installation is one of a growing number of grid-connected Solar Frontier installations by Prinz that combined produce more than 400 kW of power. For this particular installation, the client wished to maximize their potential profits from the German feed-in tariff which favors energy that is immediately consumed in the house. The system meets that target with more than 38 percent of the produced current consumed on site. Over the course of one year, the installed CIS modules will supply the family with over 70 percent of their electricity needs.


To ensure that such a high proportion of electricity was consumed locally, it was essential that the modules offer not only high efficiency but also strong performance in non-optimal light conditions such as during early morning, late evening and cloudy days. Solar Frontier CIS modules were the first choice for having the best efficiency of all thin-film modules, and for the light soaking effect, which enables the panels to provide more power than their rated capacity. Compared to similarly sized crystalline systems installed in the area, the CIS system produces 11.7 percent more kWh per installed watt of power.

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