Over voltage from solar panels

Discussion in 'Solar Power' started by Stealaway, Feb 10, 2016.

  1. Stealaway

    Stealaway Funster

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    I have this kit wired to my starter battery and my two domestics.
    It's working a treat and charging the battery's easily.
    The problem is that the voltage to the start battery is occasionally going over voltage - to 16.2 volts.
    The supplies sez the voltage can increase because of a low ambient temperature, I'm not convinced.
    Any ideas peeps?

    http://www.ebay.co.uk/itm/20A-12V-2...392978?hash=item2808dcffd2:g:4VIAAOSwEetWBOmN
     
  2. jollyrodger

    jollyrodger Funster Life Member

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  3. andy63

    andy63 Funster

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    What's the voltage reading on the habitation batteries... I'm reading it that both battery banks are connected to the the charge controler... and would expect to see the same voltage on both battery banks.
    And have you confirmed that voltage with a meter...
     
  4. andy63

    andy63 Funster

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    The first link is to a single outlet pwm controler with remote panel and the 2nd to a dual output controler ... which is it...???
     
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  5. jollyrodger

    jollyrodger Funster Life Member

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    If it is charging two banks . as stated in op ,it should be the link for the duo .
    Also you can decide the ratio of charge (50/50% etc the default is 80% start batt /20% aux batt) according to my paperwork .
    Unless others know different :)
     
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  6. andy63

    andy63 Funster

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    Yes that makes sense.. I'm not sure how a dual output works and whether it regulates the load voltages separately
    My habitation batteries are connected to a single outlet mppt controler but then to the vehicle battery through a voltage sensing relay and I see both voltages the same on each battery bank... hence my question above...
    16.2v does seem excessive for the load voltage...
     
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  7. jollyrodger

    jollyrodger Funster Life Member

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    I have the remote also as part if the system ,which sometimes give figures that I don't believe ,so have a digital readout plug in which shows a steady 14.2v (200w solar panel) in hot Clime's it usually gets around 14.8v I'm happy with that :)
     
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  8. Stealaway

    Stealaway Funster

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    I am getting 14.2 ish to the leisure battery's continually. I have it set to to 50/50 at the moment and the leisure are fully charged now - as is the start - I think!
    Just not happy with it going up to 16.1V at times.
    I could try swapping the connections to the start with the domestics and see what happens.
     
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  9. jollyrodger

    jollyrodger Funster Life Member

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    You shouldn't need to swap any connections ,your number 1 batt (starter) is by default being changed @ 80% you can alter that from the controller .if you haven't got a user guide download a PDF from the link I gave earlier .
     
  10. denisejoe

    denisejoe Funster Life Member

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    I would have thought that the leisure battery would have been the no 1 for charging

    joe
     
  11. Stealaway

    Stealaway Funster

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    That is the way I have it set up but because you can alter the bias from 20/80% to 80/20% it shouldn't make any difference.

    Why would you think that number one battery connections should go to the starter battery
    I have the same instructions that came with the controller and the amp meter. Neither are much good when you have a fault.
     
  12. jollyrodger

    jollyrodger Funster Life Member

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    Why would you think that number one battery connections should go to the starter battery
    I have the same instructions that came with the controller and the amp meter. Neither are much good when you have a fault.[/QUOTE]


    Should have put for example :LOL:
     
    Last edited: Feb 11, 2016
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  13. tonyidle

    tonyidle Funster

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    Before going further check battery voltages with a digital meter (as suggested above). And, a separate question, what is the charge current reading when you see 16.2v?
     
  14. Stealaway

    Stealaway Funster

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    As an ex electrician I have been using a multi meter nearly all my life. This one is a Fluke 77 series
    The Electrobloc panel shows the start battery voltage off the scale (+15V) when I measure the starter battery with my meter its is at 16.2 V
    The voltage on the panel for the domestics shows 14.4V and the same with the meter.

    I haven't measured the current reading but the amp meter shows +4/6A from 250W of solar panels (bright sunshine but in Derbyshire)

    The controller settings also has a 'frequency setting' but doesn't explain what this refers to.

    This is the controller-----http://www.ebay.co.uk/itm/391336201309?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
     
  15. Don Quixote

    Don Quixote Funster

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    Have you tried swapping over the output from A to B and see what reading you get then? remember to cover solar panel before removing wires
     
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  16. Stealaway

    Stealaway Funster

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    That's going to be my next step
     
  17. tonyidle

    tonyidle Funster

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    I don't believe you should ever see over 14.5v-ish. IMO the controller is faulty.
     
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  18. walburga

    walburga Funster

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    The manual for that solar reg states that the battery will show a boost charge of up to 14.8 volts, depending on what type of battery the user has programmed in.
     
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  19. Don Quixote

    Don Quixote Funster

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    @Stealaway - Well how it it go?
     
  20. Stealaway

    Stealaway Funster

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    Not today - been busy most of the day with the computer. Replacing the new video card drivers led to the mega download of the new Windows 10 upgrade and much more. It took most of the day.
    I'll let you know tommorow.
     
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