Positive Tolerance of PV modules

Discussion in 'Electronic Projects' started by Syed Waqar Ali, Oct 12, 2017.

  1. Syed Waqar Ali

    Syed Waqar Ali

    Joined:
    Jan 13, 2016
    Messages:
    13
    Likes Received:
    0
    Location:
    Pakistan
    Hi Everyone!!

    Hoping that you all would be fine, i have a little query to share with you..

    " Why PV modules (Solar panels) always available with Positive tolerance instead of +/- tolerance "
     
    Syed Waqar Ali, Oct 12, 2017
    #1
    1. Advertisements

  2. Syed Waqar Ali

    Harald Kapp Moderator Moderator

    Joined:
    Nov 17, 2011
    Messages:
    7,606
    Likes Received:
    1,336
    Location:
    Germany-Europe-Earth-Sol System-Milky Way-Laniakea
    Tolerance with respect to which parameter?
     
    Harald Kapp, Oct 12, 2017
    #2
    1. Advertisements

  3. Syed Waqar Ali

    Syed Waqar Ali

    Joined:
    Jan 13, 2016
    Messages:
    13
    Likes Received:
    0
    Location:
    Pakistan
    Power Wattage ratting i.e a PV module of 265 watts rating
     
    Syed Waqar Ali, Oct 12, 2017
    #3
  4. Syed Waqar Ali

    hevans1944 Hop - AC8NS

    Joined:
    Jun 21, 2012
    Messages:
    3,348
    Likes Received:
    1,619
    Location:
    Venice, Florida, USA
    I think it must have something to do with marketing. You wouldn't sell a can of beer as being 32 ounces plus or minus one ounce. No, you would make sure that can contained at least 32 ounces. Same-o same-o with solar panel modules. If you advertise your module as producing 300 watts under optimum lighting, it better have a positive tolerance such that any panel sold will produce at least 300 watts under optimum conditions.
     
    hevans1944, Oct 12, 2017
    #4
    Harald Kapp likes this.
  5. Syed Waqar Ali

    Syed Waqar Ali

    Joined:
    Jan 13, 2016
    Messages:
    13
    Likes Received:
    0
    Location:
    Pakistan

    Yes... it seems like that
    Thank you very much for your support :)
     
    Syed Waqar Ali, Oct 12, 2017
    #5
  6. Syed Waqar Ali

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Joined:
    Jan 21, 2010
    Messages:
    23,164
    Likes Received:
    2,092
    Location:
    Mid way between Beijing and the Ronne Ice Shelf
    Typically a good solar panel will have a guaranteed output. To ensure this, the output power will typically be higher.

    For example, a 300W panel may be nominally 330W, with a range of outputs between 300 and 360W. So rather than calling it 330+/- 10%, they will guarantee 300W and specify that the panel may be up to +20%.

    It's actually more complex than this because the guaranteed output will also be over time and the output will fall over time, so these things must be taken into account to allow for (say) a guaranteed output of 80% of the retreat output after 15 years.
     
    (*steve*), Oct 12, 2017
    #6
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.