# PVsyst's forum

Welcome on PVsyst's forum.
 It is currently Thu Sep 24, 2020 6:41 am

 All times are UTC+02:00

 Post new topic  Reply to topic Page 1 of 1 [ 3 posts ]
 Print view Previous topic | Next topic
Author Message
 Post subject: Detailed electrical losses: Module LayoutPostPosted: Tue Feb 27, 2018 8:36 am

Joined: Tue Feb 27, 2018 8:23 am
Posts: 4
According to PVSyst's manual:

"the I/V characteristics of the partially shaded sub-module is evaluated (10% cells shaded for 1 corner shaded, 1/3 for 2, 2/3 for 3, 100% for 4 corners). It is again an approximation, but when inserted in the I/V full array characteristics the electrical effect is about the same as soon as the sub-module is shaded."

Full Calculations steps: http://files.pvsyst.com/help/near_shadi ... trical.htm

I wanted to know what the 10%, 1/3 and 2/3 (in step 2) meant with reference to IV characteristics?

P.S any explanation or further information on how PVSyst's calculation method would be much appreciated as I'm not sure I fully understood it.

Top
 Post subject: Re: Detailed electrical losses: Module LayoutPostPosted: Fri Mar 02, 2018 7:27 pm

Joined: Mon Apr 16, 2012 7:29 pm
Posts: 1680
This percentage concerns the I/V curve calculation for one sub-module. It means that when 1 corner is shaded, 10% of the cells are shaded, 33% of the cells when 2 corners are shaded, etc.

This affect the I/V shape of each shaded submodule. By the way this real shape has almost no impact on the full sub-array shaded I/V characteristics. Only the number of shaded sub-modules - whatever the number of cells shaded - is significant.

Top
 Post subject: Re: Detailed electrical losses: Module LayoutPostPosted: Wed Mar 07, 2018 11:32 am

Joined: Tue Feb 27, 2018 8:23 am
Posts: 4
Thank you for your help.

Top
 Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending
 Post new topic  Reply to topic Page 1 of 1 [ 3 posts ]

 All times are UTC+02:00

 You cannot post new topics in this forumYou cannot reply to topics in this forumYou cannot edit your posts in this forumYou cannot delete your posts in this forumYou cannot post attachments in this forum

Search for:
 Jump to:  Select a forum ------------------ PVsyst SA Announcements (read only)    Latest news - Bifacial Modelling and 3D Drawing    PVsyst's forum rules FAQ (read only)    Installation and use of PVsyst    Meteo data    PV Components    Shadings and tracking    Simulations : parameters    Simulations : results    Standalone and pumping systems Your questions about PVsyst    Howto    Problems / Bugs    Meteo data    PV Components    Shadings and tracking    Simulations    Suggestions    Tutorials : Feedback and requests Links    PVsyst website    YouTube Channel