Photovoltaics: Elegance in the High Alps
High above St.Moritz, at 2,400 m ASL on the Muottas Muragl, the sun shines on 300 days of the year. this makes this high-alpine mountain landscape into the perfect location for generating solar power.
The conditions here are not only ideal for sun lovers, but also for the 300-metre long photovoltaic plant which has been installed along the funicular embankment on the Muottas Muragl since December 2010. The plant is well known far beyond the region as a beautiful example of an elegantly integrated solar plant.
The precise southerly orientation of the plant and its inclination angle of 45° permit optimum absorption of the solar energy. For this purpose, the rail track was widened by a solid steel construction on which the subframe for the solar module was mounted. The plant, which belongs to Current AG, was installed by SolarMarkt GmbH in icy temperatures last winter.
278 modules in six sectors now produce power, which is delivered to the inverters via RADOX cables with a length of between 150 and 350 metres. A total of 8,000 metres of cable are routed under the modules in a cable conduit, from the individual sectors to the power control centre in the summit station. RADOX solar cables from HUBER+SUHNER are predestined for this application in the harsh mountain environment. Thanks to their electron-beam cross-linked insulation, they are resistant to extremely high temperature variations, wear, ozone and weathering.
Each of the six zones in the plant are connected to an inverter with a nominal capacity of 10 or 12.5 kVA. The 64-kWp solar plant delivers around 100 MWh annually to the grid, which corresponds to the energy requirements of about 20 households.