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Photovoltaic systems

  • Photovoltaic systems

    Photovoltaic systems

    In order to use the solar energy for power production, a variety of photovoltaic systems is installed on the landfill areas, building facades and roofs in Flörsheim, Grävenwiesbach, Offenbach and Brandholz. 

    Photovoltaic systems at a building facade in Flörsheim-Wicker
    Photovoltaic systems at the former disposal area Grix in Offenbach
  • Technology

    Technology

    A solar module of a photovoltaic system consists of serially or parallel connected solar cells. These cells transform the light energy of the incident radiation into electrical energy. The transformation process is based on the photoelectric effect, which describes the discharge of positive and negative charge carrier in a solid body through light irradiation.

    Semiconductor solar cells generate power through production of free charge carrier. The incident photons dissolve electrons out of the silicon atoms, so that they can move freely. An internal electrical field, mostly caused by a p-n-transition, separates the free charge carriers. Thus, an electrical voltage can be tapped over metal contacts. If an electrical load is connected, direct current flows.

    Construction and processes in a photovoltaic cell
    © Volker Quaschning
  • Technical Data

    Technical Data

    Flörsheim-Wicker:

    • Initial start-up: 2005
    • Type/producer: crystalline silicon modules/First Solar, USA
    • Modulus surface: ca. 5300 m

    Total:

    • Installed electrical power: 6.4 MW
    • Power production: 5m kWh/a
    • CO2-reduction*: 5200 t/a

    *compared to power production with fossil fuels (brown coal)