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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Data and monitoring: 480wp Solar PV array Monitoring data.

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  1.  
    • CommentAuthorGBP-Keith
    • CommentTimeMay 3rd 2008
     
    Statistics:

    8 no BP Solarex 60 watt 12 volt panels.

    Wired in pairs to give 24 volts.

    20 metres from battery bank connected using 10mm cable.

    Battery bank is 1680 amphours.

    BP 20 amp solar charger.

    Top array of this photo:
    • CommentAuthorGBP-Keith
    • CommentTimeMay 3rd 2008 edited
     
    Monitoring stats for March 2008:
    • CommentAuthorGBP-Keith
    • CommentTimeMay 3rd 2008
     
    Monitoring stats for April 2008:
    • CommentAuthorGBP-Keith
    • CommentTimeJun 2nd 2008
     
    collected data for May.
    • CommentAuthorGBP-Keith
    • CommentTimeJul 8th 2008
     
    Collected data for June 2008
    • CommentAuthorsimeon
    • CommentTimeJul 8th 2008
     
    Am I right in thinking that the energy output per day in June = 53 x 24 = 1.3kWh ?

    What is the surface area of these units? I would be interested in knowing the wattage per sq metre.
    • CommentAuthorGBP-Keith
    • CommentTimeJul 10th 2008
     
    Yes your conversion is correct give or take a few watts. It would be slightly more accurate to do 53x26 +1.378kWh because when the panels are generating the battery voltage is always higher

    The output a/h per sq metre is actually shown on the thread below Simeon as a comparison to the tracker output. The size of the array is roughly 4.4m2

    http://www.greenbuildingforum.co.uk/forum114/comments.php?DiscussionID=1672&page=1#Item_18
    • CommentAuthorGBP-Keith
    • CommentTimeAug 5th 2008 edited
     
    Collected data for July 2008. A very poor month for solar.
    • CommentAuthorGBP-Keith
    • CommentTimeOct 2nd 2008 edited
     
    Collected data for August 2008. Another very poor month for the static solar but interestingly it does not show as wide a variation as the tracker.

    In other words, the performance of the static array has been comprehensively low this summer whereas the tracker (see other thread) has been able to take advantage of sun when it has bothered to shine.
    • CommentAuthorGBP-Keith
    • CommentTimeOct 7th 2008 edited
     
    Collected data for September 2008. The sun came out in the second half of the month allowing output to equal that of August.
    • CommentAuthorGBP-Keith
    • CommentTimeDec 21st 2008
     
    Collected data for October 2008. Vertical axis is now normalised to 100ah so bear this in mind when comparing to above charts.
    • CommentAuthorGBP-Keith
    • CommentTimeFeb 3rd 2009
     
    November 2008
    • CommentAuthorGBP-Keith
    • CommentTimeFeb 3rd 2009
     
    December 2008
    • CommentAuthorGBP-Keith
    • CommentTimeFeb 3rd 2009
     
    January 2009

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