Basic electrics

Discussion in 'Tech/Mech General' started by stylites, Jun 9, 2016.

  1. stylites

    stylites Funster

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    Hi everyone, this is my first post. Excuse woeful ignorance. We've got a 1990 Mercedes 308 campervan. I've no idea how the electrics work. The van's fitted with a KT12 Power Supply Battery Charger. I've noticed that the orange power switch is in the off position. What exactly is the function of this bit of kit? Does it charge up the leisure battery when the engine is on? Should it be left on or just switched on when the van is being used?
    Many thanks
     
  2. StitchesnFluff

    StitchesnFluff Funster

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    Hi & welcome to Motorhome'fun'

    Any pics? Might help id issue
     
  3. scotjimland

    scotjimland Funster Life Member

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    The KT 12 is a simple battery charger, from the early 90s.. it charges the leisure battery when you are on electric hook up.. the orange switch is the on/off 230v switch

    it can be safely left on.. it has no function whist you are driving ..

    battery charging whilst driving comes from the van alternator via a relay .
     
    Last edited: Jun 9, 2016
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  4. stylites

    stylites Funster

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    Thank you for a lovely clear helpful reply.
     
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  5. StitchesnFluff

    StitchesnFluff Funster

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    Lots of knowledge on here
     
  6. stylites

    stylites Funster

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    And thanks for your welcome StitchesnFluff!
     
  7. StitchesnFluff

    StitchesnFluff Funster

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    A pleasure, enjoy the forum
     
  8. MH 55 FUN

    MH 55 FUN Funster

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    :hiya2: & :welcome3::):)
     
  9. scotjimland

    scotjimland Funster Life Member

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    thanks..

    welcome from me also.. enjoy the forum..
     
  10. stylites

    stylites Funster

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    What lovely people you all are! How come I've missed out all this time?
     
  11. StitchesnFluff

    StitchesnFluff Funster

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    Well you are here ńow!
     
  12. pappajohn

    pappajohn Funster Life Member

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    In addition to scotjimlands useful post........if you have the van on mains hookup at home its advisable to turn off the charger and only turn on for a few hours every week or two to keep the battery topped up when not in use.
    It sounds like the charger is a constant current charger and left on indefinitely will overcharge your battery.
    Obviously, when in use leave it on constantly.
     
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  13. scotjimland

    scotjimland Funster Life Member

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    yes.. good point John.. I neglected to say that..

    .. the KT 12 isn't a 'smart' charger..
     
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  14. stylites

    stylites Funster

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    Thanks pappajohn. Will do.
     
  15. wigster

    wigster Funster

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  16. StitchesnFluff

    StitchesnFluff Funster

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    So not leave the van permanently hooked up at home?
     
  17. scotjimland

    scotjimland Funster Life Member

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    If your van has a modern multistage charger yes, you can.. it will not boil the battery(s) ..
    The float charge in the third stage maintains the battery at full charge.

    In saying that, I only put mine on EHU for a couple of days per month .. but I also have solar panels that keep it topped up..

    Just noticed you have a Hymer.. so no problems..
     
  18. StitchesnFluff

    StitchesnFluff Funster

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    Good, thanks
     
  19. Cleve

    Cleve Funster

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    :welcome4:
     
  20. Baycott

    Baycott Funster

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    from us in East Sussex and
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