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Commercial roof-top Bodman


Boat houses generate additional benefit and earnings

The boat houses in Bodman on Lake Constance are utility buildings used to store boats over the winter. Putting a photovoltaic system on the rooftops of these buildings makes them even more useful: for producing solar electricity. Income from feed-in tariffs
are a welcome supplement to rental income, especially in the best months of the year. And solarcomplex AG has come one step closer to its goal of supplying the Lake Constance region mainly through renewable energies.

As general contractor, Phoenix Solar was commissioned to design an overall photovoltaic system to derive the maximum value from all buildable surface areas. Despite the
different angles of the rooftops, 2,816 interconnected First Solar modules installed
generate the highest possible yield. Similarly, for reasons of economy the 16 inverters were attached to sub-structure on the side of the building to save space: The entire area
therefore remained reserved for the boats. Moreover, the roof skylights
which are the source of daylight had to be left free.

Such specific requirements were realised despite the tight schedule thanks to the professional and cooperative teamwork on site. The photovoltaic system on the Bodman boat houses is now working to everyone‘s satisfaction - and is sending the right signal in terms of climate protection and environmental awareness in the holiday region of Lake Constance.

Technical Data
Rated system power 0.211 MWp
Annual energy yield approx. 194.1 MWh
Equivalent to the power
consumption of
approx. 48 families**
Feed-in tariff/kWh EUR 0.3645
Feed-in tariff p.a EUR 70,756
CO2-savings p.a. approx. 111 tons*
No./type of modules 2,816 units First Solar FS275
Inverter 16 units PVI-12.5-OUTD-FS
Construction type Roofing system (parallel)
Tilt angle 10° roofs facing east and west
15° roofs facing south
Frame technology TectoSun Plus (cross-bracing)
Orientation East, west and south

* Source: The evolution of carbon dioxide emissions within the German power mixture 1990-2008: 0.575 tons CO2 saved per MWh (Umweltbundesamt FG I 2.5., Status March 2010)
** Source: Average power consumption of a family: 4,000 kWh (Verivox, Status 2010)

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