Split Charge Relay Kit

Discussion in 'Tech/Mech General' started by ****, Jun 21, 2016.

  1. ****

    **** Read Only Funster

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    I cant remember if i asked or not but if i did humor me. As i am only running a few 12v lights, Car stereo and a couple of USB ports for charging phones would a 100amp split charge kit be OK? I even doubt i would use the USB unless driving. Wife is making noise (again) about a 12v cool box but if i get one that would be up front running from the main battery and only when driving.

    I was thinking of ordering this.

    http://www.ebay.co.uk/itm/Great-Val...056209?hash=item3cdab0c751:g:8BcAAOSw~1FUYSm2
     
  2. Flamenca

    Flamenca Funster Life Member

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    I am just wondering what is the output of your alternator.
     
  3. Terry

    Terry Funster

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  4. ****

    **** Read Only Funster

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    Dont know i would need to look into that further. Is there a lower limit i am looking for?

    I was going to put in a manual switch but was put off with people saying if i forget to turn leisure off i could kill my alternator. Yeah charging on the move is what i am after.
     
  5. pappajohn

    pappajohn Funster Life Member

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    A simple on/off switch will have no effect or your alternator.
    What WILL happen when you try to start the engine is the switch and wiring will fry or, if a fuse is fitted it will simply blow.
    Your starter could draw upwards of 400 amps and that would be sourced from both engine and leisure batteries which the thin interconnecting wire cannot handle.
    The main reason for split charge relays only activating AFTER the engine is started.
     
  6. ****

    **** Read Only Funster

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    So i will also have to remember to switch it off when i stop for fuel or a cup of tea when charging. For the sake of £40 i think i had better get the relay. I know im Scottish but not that tight. Ill presume when @Flamenca was asking about the output this would be to determine if its strong enough to charge two battery's.
     
  7. Flamenca

    Flamenca Funster Life Member

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    The kit you are considering is rated at 100 amps which might well be in excess of your alternator output so I wonder why you should fit such heavy duty relays. The kit suggested by @Terry might well be adeaquate.
     
  8. ****

    **** Read Only Funster

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    Ah. Penny dropped. I looked at his link and thought it was a manual system where i had to turn the big red battery switch. Just reading that advert now and found my first post that i had lost.
     
  9. Yorick

    Yorick Funster

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    I sent you a link to the one i fitted. Did you lose it, Muppet ?
     
  10. ****

    **** Read Only Funster

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    Is this how Terrys link is wired in?

    [​IMG]
     
  11. ****

    **** Read Only Funster

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    Just not long found it again. Forgot what forum i was asking in. Doh!
     
  12. Yorick

    Yorick Funster

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    Muppet :boxing:
     
  13. Terry

    Terry Funster

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    No need for the alternator wire :) simply wire to poss and neg on starter battery to the two left terminals and top right (3 on rt) to the l/Battery and make sure the L/Batt is earthed -use fuses provided ;)-it's smart and recognises that the starter battery is getting charge so simply turns on the relay (y) the two other terminals on right are for fridge etc -instructions are easy(y) -they must be even I understand them :LOL:
    terry
     
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  14. ****

    **** Read Only Funster

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    This sounds to easy :D So no switching from me whatsoever. Just plumb in and leave it to work away itself. Im liking this system more.
     
  15. Terry

    Terry Funster

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    IT IS VERY EASY-- fit and forget (y)
    terry
     
  16. Terry

    Terry Funster

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  17. ****

    **** Read Only Funster

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  18. premiere99

    premiere99 Funster

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    I have fitted an M-Power Intelligent Voltage Sense Relay to our Autotrail, http://www.ebay.co.uk/itm/4mtr-Spli...-Made-Leads-/251515162668?hash=item3a8f78d02c which allows both starter and habitation batteries to be charged from the alternator, solar panels or my CTEK 8 stage charger. As soon as one of the above reaches 13.3v they both benefit from the charge, when the voltage drops below 12.8v the batteries are isolated. It really is a fit and forget solution.
     
  19. ****

    **** Read Only Funster

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    Cheers @premiere99 but to be honest mate this is just a throw together cheap self build van that will run for a year, might be two. If we enjoy the van then i will be buying a larger one and doing it all again but more professional. A more heavy duty split charge system may be in order. Electric hook up, kitchen. Im planning it in my head already and not even been away with this one yet.
     
  20. Geo

    Geo Trader - Funster

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    Oh dear
    You have OCD
    Obsessive Campervan Disorder.
    There's no cure you know, it just gets worse and worse till you buy an RV:doh:
    then and only then, can you slowly downsize to a stable condition.
    But alas no known cure, you can only pray you die before you go bust:rofl::Eeek:
     
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