The Theory, The Practise & the Bank Balance - Page 2





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  1. #21
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    Default Re: The Theory, The Practise & the Bank Balance

    Quote Originally Posted by Prof View Post
    To revisit my old thread...

    Pulled the 260aH from it's space, some cleaning required of the dust mites, and saw the date of purchase was July 2014.

    Wow, six years old and still gives me approx 12.5V on a winter's morning and 12.6V on a summer's morning before charging. (That is on a no load situation)

    Sure many more years to go....
    Thanks for sharing your stats. It shown the plus side of big battery banks and always at a high level SOC.

    Why did your 24V bank suffer so badly in the middle of Oct 2018?

  2. #22
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    Default Re: The Theory, The Practise & the Bank Balance

    Quote Originally Posted by ekkekan View Post
    Thanks for sharing your stats. It shown the plus side of big battery banks and always at a high level SOC.

    Why did your 24V bank suffer so badly in the middle of Oct 2018?
    Panels are not optimally set up. Flat roof facing east. Keeping panels low as to not be super visible from die dorpie. Trarde offs one has to do....
    Those were most likely super cloudy/rainy days.
    Robert van den Berg

    1998 Daihatsu Rocky 'The Kitty'
    2002 Daihatsu Rocky 'The Bully'

    'The danger comes from hankering for normalcy again, rather than getting on with working out how to deal with whatever is ahead.' - CNN article

  3. #23
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    Default Re: The Theory, The Practise & the Bank Balance

    Quote Originally Posted by Prof View Post
    Panels are not optimally set up. Flat roof facing east. Keeping panels low as to not be super visible from die dorpie. Trarde offs one has to do....
    Those were most likely super cloudy/rainy days.
    I would not have thought you will ever allow a 24V bank to drop to 11-13V even in bad times for solar.
    Name:  prof-24V.jpg
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  4. #24
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    Default Re: The Theory, The Practise & the Bank Balance

    Quote Originally Posted by ekkekan View Post
    I would not have thought you will ever allow a 24V bank to drop to 11-13V even in bad times for solar.
    Name:  prof-24V.jpg
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Size:  48.3 KB
    Once you drop below about 21v the voltage is more a function of load than SOC. The battery goes high impedance with voltage in free fall.

    In other words, itís meaningless.
    Cheers

    ZS5KAD
    3 V8's
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    A V6 and an inline 4

    The frogs are starting to notice that the water is getting warm but it is already too hot to do anything about it.....

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