Referenz der Ritter XL Solar GmbH


The integration of the solar plant and the rebuildings in the net were planned by the engineering bureau Integral Projekt GmbH & Co. KG. Normaly the feeding of the solar heat occurs with the targeted inlet temperature, which is driven gliding between 85 and 105 °C. However, the hydraulic integration and the control technology also allows to choose the operating method to increase the return temperature in times with weaker irradiation.

In a time, in which the question is intensely discussed, how the district heating can be transformed in the age of the renewable energy, the project of the municipal utilities of Senftenberg has a really pioneering meaning. Completely without doubt solar thermal is the most obvious, the most mature and most economic ones of the renewable options.


A pioneering project for german district heating

  • Location: Senftenberg, Germany
  • Solar system to feed in district heating network
  • Collector surface: 8.300 m²
  • Annual yield: approximatly 4000 MWh
  • Commissioning: august, 2016

In August, 2016 on a recultivated landfill site in the town Senftenberg the up to now biggest solar thermal plant of Germany went into operation. With 8,300 m² collector area is it at the same time one of the biggest divices with vacuum tube collectors world wide and the first real tall divice in Germany which feeds into a classical urban district heating grid. The whole planning of this solar plant with several innovative details came from Ritter XL Solar, who delivered the collector field of 1.680 high-capacity collectors and the controler of the system

The district heating net of the municipal utilities of Senftenberg has a total length of about 33 kilometres, a connected load of about 50 MW and an annual heat demand of more than 100 MWh. The solar plant was so dimensioned that it can supply the complete heat demand of the grid on normal summer days. The solar device is connected with the district heating grid decentralised in a ring line. In addition, a bypass was inserted in the heating central, so that the content of 2000 m³ of the district heating grid takes up the peak power of the solar device on days especially rich in radiation and can serve so as a buffer. This solar device thereby don´t need an additional buffer tank.