Posting a message to the forum will remove the above advertisement
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Discuss Calculate distance between rows of panels on flat roof in the Solar PV Forum area at ElectrciansForums.co.uk.

Thread Status:
Not open for further replies.
Please make sure you checkout our forum sponsors, many do discounts for members and, they keep the forum free to use.
  1. gr7
    Offline

    gr7 Electrician's Arms

    Location:
    Hampshire
    Does anyone know how to calculate the required distance between rows of modules to avoid any shading issues? I may need to mount the panels at less than 30° to avoid the need for planning permission and would rather not use mounts such as the Solion model as these waste valuable roof space between the modules.
     
  2. mmccx
    Offline

    mmccx Regular EF Member

    can you do trigonometry?
     
  3. gr7
    Offline

    gr7 Electrician's Arms

    Location:
    Hampshire
    Yes, was hoping for a 'rule of thumb' response though.
     
  4. JulianC
    Offline

    JulianC Electrician's Arms

    Location:
    Wolverhampton
    I think I read somewhere that as a rule of thumb, row spacing should be around 3 x height of the panel at its highest point. This ties in roughly with the ConSole bucket mounts that require a row spacing of 1.2-1.5m, so if you stick to that, you won't be far wrong.
     
  5. mmccx
    Offline

    mmccx Regular EF Member

    work out the opposite and the adjacent

    sin30 x hyp=opp
    cos30 x hyp=adj

    then muliply the opp by 1.45 to get the distance from the back of the row to the start of the next row.

    and the adj * number of rows + the distatnce between a row * number of spaces between the rows = total width of the array
     
  6. JulianC
    Offline

    JulianC Electrician's Arms

    Location:
    Wolverhampton
    So effectively you are saying row spacing is 1.45 x height of the row. That seems far too close??
     
  7. jupiter276
    Online

    jupiter276 Guest

    rule.jpg

    1. Always take a rule of thumb as Alpha = 16 degree.
    2. There is also an Excel program by Schletter to calculate it. Very easy.
    3. A research paper by Volker Quaschning and Rolf Hanitsch also mentioned this.
    4. The book named "Planning and Installing Photovoltaic Systems
    A Guide for Installers, Architects and Engineers
    Second Edition" also mentioned that.
    Contact me to have some more info if you want.

    Jupuiter276
    N
     
  8. Markc
    Offline

    Markc CCTV / Alarms

    Location:
    Norfolk
    All far to complicated 3 x height works fine.
     
  9. JulianC
    Offline

    JulianC Electrician's Arms

    Location:
    Wolverhampton
    Yup, and taking Alpha as 16 degrees as above, the distance between rows calculates out at 3.48 x row height anyway. 3 is close enough for me!
     
  10. Worcester
    Offline

    Worcester Forum Mentor

    Location:
    Worcestershire
    To avoid any shading, for Reading (Lat 51.5) you should take Alpha as 15 degrees, or in simple terms, 3.73 times the height of the panels (between the top and bottom of the panel) between the back edge of the panel and front edge of the next panel

    The further north you go the lower the angle gets

    That's the equivalent of latitude 48 degrees (le Mans, France) if you do that you will get quite a lot of shading along the bottom edge of the panels which will dramatically affect output.

    Just grab the Scletter Calculator, it's free and simple to use.

    Oh and go here, Sunrise and Sunset Calculator

    Choose something like 21st December / or look for the lowest angle, that way you can be sure of not getting shading.
     
  11. U2Singhy
    Online

    U2Singhy Guest

    Can you please provide a link for the Schletter Calculator?
     
Loading...
Similar Threads - Calculate distance between Forum Date
Approved Electrician, distanced learning. Installation project Electrical Courses & Electrical NVQ's Nov 10, 2018
Part time/distance learning 2365 lvl 2+3 Electrical Courses & Electrical NVQ's Sep 18, 2018
Thread Status:
Not open for further replies.

Share This Page

Users found this page by searching for:

  1. optimal row spacing for rows of PV panels

    ,
  2. typical distances between solar pannels on flat roofs

Electricians Directory Post a Domestic Job Post a Commercial Job