Optimum Row Distance

Page PV Modules > Graphic layout > Input > PV area > Edit PV area > Calculate Optimum Row Distance

The optimum row distance for mounted PV systems is calculated so that the module rows do not shade each other at 12:00 p.m. during winter solstice. Thus, the mutual shading of mounted module rows is minimized for the entire year.

The Row Distance is a function of the module inclination b, the sun's position g on 12/21 at 12:00 p.m. and the mounting height h of the module.

Warning: Please note that the self-shading of mounted module rows is factored in automatically only in the 3D-Visualization. Please enter the expected shading-loss under PV Modules > Shading.

-> Prerequisites:

Mounted PV modules

-> To calculate the optimum row distance:

1. Select a PV area and go to   Edit PV area (context menu)
   The Module Coverage dialog will open.

2. Click on the Calculate Optimum Row Distance button.
   The button is only available for mounted systems (-> see Installation Type).
   The Row Distance dialog is opened.
   On the left, you will see a graphic that shows the distances and angles.
   On the right, you will see:
   Settings: module width, mounting height, module inclination ß, roof angle ß1, posotion of sun γ, as well as the date and time of the winter solstice
   Results: the calculated Row Distance d, frame distance d1 and the projected module width (d-d1)
   

3. Confirm the acceptance of the data with OK. You will return to the dialog Module Coverage.
   The Frame Distance d1 is now entered as Row Distance.

4. Confirm your entries by clicking OK.
   Return to the roof view.