# PVsyst's forum

Welcome on PVsyst's forum.
 It is currently Thu Sep 24, 2020 7:31 am

 All times are UTC+02:00

 Post new topic  Reply to topic Page 1 of 1 [ 2 posts ]
 Print view Previous topic | Next topic
Author Message
 PostPosted: Fri Feb 20, 2015 5:34 pm

Joined: Fri Feb 20, 2015 5:24 pm
Posts: 2
Good afternoon,´

My consult is about how to interpret the suggested capacity of the battery given by the pvsyst at the top-right corner of the components selection window. My Suggested battery capacity is 2000 A-h.
I know that the database of the batteries in the software rate the capacity at C10 , however, i got a calculation from another software made by a distributor of battery banks resulting of an equal value but telling me that the value is at C100 because the calculation for the battery uses an amount of energy that will be used by 7 days ( my autonomy is seven days) and that amount of hours is something like 168 h, therefore i had to buy a battery of 2000A-h at C100 because 100 hours is "closer" to 168 hours.

kind regards,

Miguel Guevara

Top
 PostPosted: Tue Mar 10, 2015 12:56 pm

Joined: Mon Apr 16, 2012 7:29 pm
Posts: 1680
As you mentioned, the battery bank estimation in PVsyst is expressed as C10 value, as the "characteristic capacity" specifying the batteries in PVsyst is C10.

However these sizing results should only be interpreted as a rough estimation.
There is no absolute way of defining the size of a battery bank, as this depends mainly on the meteo variability, and the eventual unequal use of the electricity.

In PVsyst, the estimation is performed by:
- generating a synthetic daily data set from the Monthly meteo data.
- performing a quick (simplified) simulation during this full year.
- estimating the probability of "loss of load" (PLOL, user's disrupting time), and adjusting the battery bank according to your specification.
Now this process is mainly dependent on the worst days sequence in the meteo data, which is highly variable, and depends on the synthetic generation.

In a next version of PVsyst we will provide a tool for performing a large set of Synthetic generations and analyze the probability distribution.

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 [ 2 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