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When using PV Sol Premium 2016 in 3D and for on roof mounting systems on pitched roofs which installation type is best to select? Is it 'flush mount - good rear ventilation' or 'roof integrated-rear ventilation'? I assume 'Mounted-roof' is for flat roofs?


Just loaded 2D to find the names of the installation types, as I remember them being different, in order to ask the same question and found that they each now have a pretty symbol! 


When in 2D and for pitched roofs and on roof mounting systems which installation type is best to select? is it 'roof parallel' or 'roof integrated-good rear ventilation'? I guess with 2D its roof parallel....





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Hi Rob,


thanks for the question. There is a little translation difference of the 3D and 2D versions of the installation type. We will have to fix that. In 3D, flush mount refers to the roof parallel installation type in 2D.


For reference, here is an excerpt from the help

  • [Flush mount in 3D] Roof parallel, if the modules are mounted a distance above the roof cladding.
  • Roof integrated - rear ventilation if the system will be installed on a support structure parallel to the roof cladding. Rear ventilation helps to cool the modules and thus higher performance.
  • Roof integrated - no rear ventilation if the module forms the roof cladding.
  • Mounted - roof, if the modules are mounted directly on the roof.
  • Mounted - open space, if the modules are mounted at ground level.

And the two drop-downs in action:



Installation Type.png



Installation Type 3D.png


So, to answer your question, for a normal roof mounted system that is installed parallel to the roof surface, but on a mounting system, you would select flush mount in 3D and Roof parallel in 2D.


If you have, say, a roof of an industrial hall where you place your tilted mounting systems on, you would choose Mounted - roof.



Additional info:


Behind those installation types there are thermal coefficients with which we feed our thermal module model. Here is the respective table from our help (in the chapter basis of calculation):


Table 1: The heating DT with respect to the outside temperature is, for example, with irradiance ESTC = 1000 W/m²


DT       Installation Type

29 K    Roof parallel

32 K    Roof integrated - Rear ventilation

43 K    Roof integrated - No rear ventilation

28 K    Mounted - Roof

22 K    Mounted - Open Space


Source: DGS Guide to Photovoltaic Systems, 3rd edition



Hope that helps, kind regards,


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