Residential Rooftop Gräfelfing

Site Overview
LocationGräfelfing, Germany
Coordinates48.15° N, 11.40° E
Average global irradiance1,156 kWh/m2/yr
Average temperature8.8 °C, 47.8 °F
Average precipitation970 mm/yr, 38.19 in/yr
Technical Overview
Date onstreamMay 2012
System capacity12.18 kWp
Panel typeSF145-L (145W)
Number of installed panels84
Tilt angle, orientation45°, 125° W/ -55° E
Expected output10,200 kWh/yr
Total CO2reduction9,045 kg/yr, 19,941 lbs/yr
Inverter1 x Platinum 2800 S (East side), 1 x Platinum 3801 (East side), 1 x Platinum 5300 (West side)
Financing Bank
Private Investment

The EFA Institut offers independent, holistic consulting and implementation of turnkey energy concepts. The fields in which the EFA Institut focuses are energy bottlenecks, energy consumption checks, photovoltaic solutions, solar thermal heating systems, wind power plants, block heating power stations and cost efficient project financing.

This installation of Solar Frontier CIS thin-film modules was built on a residential rooftop in Gräfelfing, near Munich. The house owner decided to have Solar Frontier’s CIS thin-film modules installed in recognition of the added value of the modules: they generate high output even under less than optimal conditions. Such less than optimal conditions, which in this case were a non optimal east/west orientation, a high level of shadowing due to nearby trees and a relatively high tilt angle of 45°.

In contrast to conventional crystalline modules, thanks to their high shadow tolerance and good low-light behavior, Solar Frontier’s CIS thinfilm modules perform well, even to the point where other module types stop working. This installation of 84 modules is expected to generate an annual output of 10,200 kWh with a resulting reduction of 9,045 kg CO2 per year.

An additional important factor to the house owner was the environmental friendliness of Solar Frontier’s thin-film modules. They contain neither cadmium nor lead and have an industry leading energy packback time of less than one year, thus being more environmentally friendly than conventional modules on the market.