Solarpark Griesheim
- Solarpark Griesheim is one of the largest standalone solar power systems in Germany.
The power plant
Solar energy power plant with total 2.5 megawatts peak.
The system consists of 16,130 solar energy modules from IBC Solar with a total output of 2.5 MWp. They are mounted on a special ground frame specially developed for large standalone systems by Schletter.
Siemens inverters are used to convert the electricity into alternating current and to feed it directly into the medium-voltage power grid. The energy generated is purchased by HSE Südhessische Energie AG on the basis of the statutory minimum price guarantee for 20 years according to the German Renewable Energies Act (EEG).
Construction began in the spring of 2007, with completion of the solar park in late summer. It was sold to Eurovoltaic plc, London, in September 2007.
Photovoltaic modules
A total of 16,130 solar energy units from IBC Solar AG are used, each with an average output of 155 Wp.
Due to the current, very difficult market situation regarding the procurement of silicon wafers, the modules contain both polycrystalline and monocrystalline solar cells. The cells are connected in the module and embedded in EVA (ethylene vinyl acetate). The front of the module comprises 4 mm thick solar glass, the rear foil a Tedlar compound that provides the embedded solar cells with long-term protection against environmental influences.
They are connected via a rear socket using MC plugs. The solar energy modules are certified as per protection class II up to a system voltage of 1,000 V and fulfill the international standard according to IEC 61215. The modules are connected to one another with a long-term stability solar cable via generator junction boxes.
Mounting system
The photovoltaic modules are mounted on a structure of steel posts and aluminum brackets specially designed for the location. The ground posts made of galvanized steel were driven approximately 190 cm into the ground in line with static requirements. In order to withstand wind loads of up to 160 kilometers per hour, the 2,905 steel supports were screwed together with special aluminum brackets.
The photovoltaic modules were fixed at an angle of 30° using a proven module installation system of aluminum rails and appropriate module clamps from Schletter. The module support frame units are positioned in rows with a five-meter gap between each in order to prevent reciprocal shadowing. They are angled exactly to the south. The front edge of the module is at least 0.60 m above the ground in order to avoid contamination from spray water or shadowing from plants.
You can find further information on the Solarpark Griesheim Website.
