Second battery bank

Discussion in 'Tech/Mech General' started by Snowbird, Sep 8, 2011.

  1. Snowbird

    Snowbird Funster Life Member

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    Following on from a previous thread have had a brainwave,"bloody hell it hurt too".You know am into off grid camping and was thinking about a completely separate leisure battery bank. I have some batteries that I have managed to recondition and was thinking of building a separate bank. I don't want to connect them to my original bank as they are a different type and age. If I built this bank and had it switchable from my original bank and put a relay in from bank 1 would this work to charge it. Also if I linked a wire from the outlet on my solar charge regulator,ie, the bulb sign, would this charge no2 bank. The logic behind this is that in unfavourable conditions ie,no wind,no sun for a few days I could switch over to bank 2. Hopefully the alternator would charge the engine battery first,then bank 1 and when bank 1 was up to 13.6 would transfer via the relay to bank 2. Hope this doesn't give you the same headache it gave me thinking about it.:Eeek:
     
  2. Geo

    Geo Trader - Funster

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    Yes But
    The supply to the bulb outlet on your regulater is very low amp wise, see instructions that came with reg, and would proberbly like most only pass a current to that terminal when main bank was healthy
    Geo
     
  3. pappajohn

    pappajohn Funster Life Member

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    controller outlet is usually only a few watts.....say, to light a dark cupboard for daytime use.

    dont think its suitable for charging purposes.
     
  4. Snowbird

    Snowbird Funster Life Member

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    Sorry John and Geo but the bulb outlet on my BP regulator is not low watt,its high power. The BP regulator bulb outlet is for power and only cuts out when batteries are discharged to 11.5 volts. Don't know about other regulators but this is "fuzzy logic" whatever that means. I run my 12 volt cooler box direct from this outlet to keep my beer cold with no problems. I have heard about this low output before and have checked it out with the manufacturers and they say all feeds should come from this to protect the battery from becoming too discharged.
     
  5. pappajohn

    pappajohn Funster Life Member

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    i dont need to know whats happening with my $600 solar controller Dave.....full 3 stage charging plus equalising mode.
    can handle a 700watt panel array @ 12volts with 50amp output.

    BLUE-SKY PV Controller

    fully user programable :thumb:

    needless to say this very expensive bit of kit was already installed when we bought the RV :Doh:

    bit over-kill when matched to a 170watt panel.....capacity for another three panels i reckon.
     
  6. niggle

    niggle Banned - Rule 1

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    there is a thing called an intelegent charger it will feed upto 5x110 amp batts in one bank and another 5x in another bank,,i dont know how it works or where you can get one if you want p/m me and i will ask the sparky where you get them from :thumb:
     
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  7. Geo

    Geo Trader - Funster

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    You didnt buy the unit from your mate RR did you Dave:Doh:
    being ex motor trade sales he will be well versed in Fuzzy Logic

    Logic as we all know. is based on ones and zero's true and false its as simple as that
    Fuzzy logic is based on theory and half truths, also know as non truths (lies)
    I wouldnt buy anything that boast about having fuzzy logic:RollEyes:
    In a nut shell
    Your bulb terminal may produce high power but then again may not
    It may cut out at 11.5 V but then again may not
    It is designed to protect your batteries,then again maybe it isnt
    Fuzzy Logic
    So to answer your original question
    Yes it will work or maybe not:Rofl1::Rofl1::Rofl1::Rofl1:
    Geo
     
  8. Snowbird

    Snowbird Funster Life Member

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    Have seen something that diverts the excess power developed from your solars to the engine battery. The idea behind this is so you don't drain the engine battery whilst using radio etc if your radio is wired to it.
    It only diverts excess power when the leisure bank is full. I wondered if this would do the job from the solars and then a relay from bank 1 to bank 2 for when am on the road.My thinking behind this is that bank 1 would always get the priority charge but any excess would charge bank 2.
    Am just asking if its a possibility and viable.
     
  9. Geo

    Geo Trader - Funster

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    Yes it is Dave perfectly attainable via multiple methods:thumb:
    I was having a poke at your fuzzy logic:Wink:
     
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  10. Snowbird

    Snowbird Funster Life Member

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    Ta Geo, You have confirmed what I thought was a possibility.
    I have a set of batteries that have managed to recover by top secret means but as they are a different make and age to the batteries I have on the van I didn't want to join them together. I also don't want to throw them away,so thought about a completely separate bank for when the sun don't shine and the wind don't blow. This would give me an extra week till hopefully weather conditions improve. Have now got wind and sun power,my next project is a waterwheel as you know am against the infernal combustion engine charging batteries.
     
  11. Geo

    Geo Trader - Funster

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    Im happy to say your logic does not appear to be fuzzy
    However given your last statement the first line of your signature requires re visiting:Wink:
    The purpose of your journies have now changed:thumb:
    Geo
     
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  12. Geo

    Geo Trader - Funster

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    Dave
    Ive solved your problems
    dont spend any more time and money on batteries
    Its insulation you need:thumb:
    From googling I have learned of the longest daylight location and also the windiest
    It would appear your location is the problem
    you need to up camp and make for Comonwealth Bay Antartica:Cool:
    You see how good real logic is
    Geo
     
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  13. Snowbird

    Snowbird Funster Life Member

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    Love it Geo.....Does Norfolkline do a ferry and can you park on Marine drive and wait for it????.
     
  14. Snowbird

    Snowbird Funster Life Member

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    OK am back from my think tank....If I put a heavy duty 2 way switch to separate bank1 and bank2 and then put a relay between bank1 and bank2, would bank2 be charged from bank1 when bank 1 reached 13.6. Would this save having to connect bank2 to the charge regulator.
    Would bank2 be charged whilst running when bank1 was fully charged???.
    I await your ideas.:thumb:
    The thinking behind all this is that I should always have a fully charged battery bank in most weather conditions and should never suffer from too deeply discharged batteries.:Cool:
     
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