PVsyst's forum

Welcome on PVsyst's forum.
It is currently Wed Sep 23, 2020 3:15 pm

All times are UTC+02:00




Post new topic  Reply to topic  [ 2 posts ] 
Author Message
 Post subject: LID and degradation
PostPosted: Tue Nov 13, 2018 3:11 am 

Joined: Wed Sep 12, 2018 1:58 am
Posts: 2
Solarworld is claiming in the warranty that the degradation of the module in year 1 will be guaranteed to stay above 97% and then they guarantee an annual degradation of 0.7% there after.
Does this include LID (light induced degradation) in the numbers?

In PYSYST there are separate tabs for LID and for Module Degradation. Should I use 3% in year 1 and 0.7% thereafter under the "Degradation" Tab, and assume this includes LID????

Or do I need to include a LID of 2% on top of the 3% in year 1 and 0.7% thereafter???


My gut tells me that I have to include both, but I don't want to double stack degradation and misrepresent the losses.......HELP PLEASE


Top
   
 Post subject: Re: LID and degradation
PostPosted: Fri Nov 23, 2018 12:26 am 
User avatar

Joined: Mon Apr 16, 2012 7:29 pm
Posts: 1680
The manufacturer's ageing values are a warranty, i.e. a worst case value for one (each) module.

The definitions for the degradation concern the whole system, i.e. an average of all modules. This is not the same thing.

Please see our FAQ How to interpret the warranty efficiency curve of the manufacturers ?


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 2 posts ] 

All times are UTC+02:00


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

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited