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  • Re: input voltage drop

    BB.BB.
    Some panels have not been lasting as long as expected due to rear backsheet failures from UV/Temperature/etc. issues: https://www.nist.gov/news-events/news/2020/03/nist-study-uncovers-potential-drive…
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  • Re: input voltage drop

    BB.BB.
    That is a problem... You have to "break" each panel out to measure its Voc/Isc numbers. As a start, I would, in the middle of the day, with a discharged battery bank (or put, for example, a…
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  • Re: input voltage drop

    BB.BB.
    It is the old question... Was a panel hit by a rock, or did it delaminate and the others are just a few years from following? Or was it "external" (failed MC4 crimp, etc.)? When panels were…
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  • Re: input voltage drop

    BB.BB.
    If you have series/parallel strings of panels... You have a couple of quick test options: * If you have a circuit breaker combiner box, you can turn off one string and then the other... Record the st…
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  • Re: sharing PV panel installation with 2 inverters (no splitting or allocations)

    BB.BB.
    Welcome to the forum Takara, I am guessing you are somewhere around Lebanon? And is this an "off grid" system (solar=>battery bank=>AC inverter=>loads) or a Grid Tied system (solar…
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