6 Volt Batteries

Discussion in 'Motorhome Chat' started by DESCO, Sep 21, 2009.

  1. DESCO

    DESCO Read Only Funster

    Joined:
    Mar 11, 2009
    Messages:
    2,651
    Likes Received:
    267
    Location:
    London
    On clearing out old files on my computer today, I found a copy of an article don't know who by or from where it came stating, if you wanted to increase the battery capacity it was better to connect two 6volt batteries in series rather than two 12volt in parallel. From what this article said you would get better charging, as the two 6volt batteries are acting as one very large 12volt. Interesting but I don't know enough about battery technology to be able to answer myself.
    Can anyone out there supply an answer?

    Thanks in advance.



    Dave:thumb::thumb:
     
  2. Geo

    Geo Trader - Funster

    Joined:
    Jul 29, 2007
    Messages:
    9,538
    Likes Received:
    5,590
    Location:
    Mansfield,Notts
    You will im sure get the definitive answer soon but for now
    I belive its all to do with halving the volts actually doubles the amps:Eek!:
    sods law or somthing
    we need a sparky:RollEyes:
     
  3. johnsandywhite

    johnsandywhite Read Only Funster

    Joined:
    Jul 29, 2007
    Messages:
    2,348
    Likes Received:
    15
    Location:
    Doncaster/Spain
    :Cool: The Yanks go for them Big Time. I'm quite happy with cheapo 12 volts. IMH&HO. :thumb:
     
  4. Losos

    Losos Read Only Funster

    Joined:
    Feb 17, 2009
    Messages:
    550
    Likes Received:
    0
    Location:
    Suffolk & Czechland
    I can't see it wuld make any difference :BigGrin:

    2 x 6v 80A/hr in series gives you 1 x 12v 80 A/hr battery

    2 x 12v 40 A/hr batteries in parallel gives you 1 x 12v 80 A/hr battery.

    At least it did when I was at college :Rofl1:There are some minor technicalities to consider like thickness of cables etc. but as a rule of thumb the above is true enough.
     
  5. chatter

    chatter Read Only Funster

    Joined:
    Aug 3, 2009
    Messages:
    3,723
    Likes Received:
    939
    Location:
    cheshire
    its to do with the plates in the battery being thicker so they hold the charge better and for longer, weight and size is the problem as they are larger and heavier than our 12v batteries, but 2 6v golf cart batteries will give approx 390amp hours compared to 2 12v 110 giving 220ah

    maggie
     
    Last edited: Sep 21, 2009
  6. johnsandywhite

    johnsandywhite Read Only Funster

    Joined:
    Jul 29, 2007
    Messages:
    2,348
    Likes Received:
    15
    Location:
    Doncaster/Spain
    :Cool: I was goi ng to mention the thickness of the plates. They are usually used in Golf Carts and Old Fogey quads/trikes. :RollEyes:
     
  7. scotjimland

    scotjimland Funster Life Member

    Joined:
    Jul 25, 2007
    Messages:
    28,934
    Likes Received:
    25,574
    Location:
    .
    For the same ampere hours, if you could get it all in one 12 volt battery, there would be no difference - a 12 volt battery has two 6 volt batteries in series inside it.

    BUT for the same ampere hours, if it is going to take two batteries to do it because of size, weight, availability, etc., then rather than two 12 volt in parallel you are better off with two 6 volt in series.

    Why is that you ask?

    Because batteries in parallel, even if twins from the same manufacturer''s batch, will never be exactly identical, so one will always be a little weaker than the other and when charging ceases, the weaker one will discharge, or steal some of the charge from the stronger one through the parallel connection. This may be minor when they are new but as they age, the problem will get worse.

    On the other hand, batteries in series can''t discharge into each other, so for that particular setup, the pair of 6 volt will be better.
     
  8. pappajohn

    pappajohn Funster Life Member

    Joined:
    Aug 26, 2007
    Messages:
    29,475
    Likes Received:
    16,947
    Location:
    YO11 2BD
    as i live on the edge of a golf course i wonder what the penalty/prison term would be if i knock some old duffer of his golf cart into a bunker and nick his batteries:RollEyes:

    £50 fine for a couple of hundred quids worth of batteries:Wink:
     
  9. 6pm Cowboy

    6pm Cowboy Read Only Funster

    Joined:
    Jun 26, 2009
    Messages:
    954
    Likes Received:
    1
    Location:
    South Oxfordshire
    Pappajohn. Really:Eeek:
    We look to you to set an example on this forum :Rofl1:
     
  10. Wildman

    Wildman Read Only Funster

    Joined:
    May 30, 2008
    Messages:
    15,458
    Likes Received:
    8,598
    Location:
    Ilfracombe, Devon
    :thumb::thumb:There you go who needs a sparks when we have our Maggie:thumb::thumb:
     
Loading...
Similar Threads
  1. Brakers
    Replies:
    37
    Views:
    1,204
  2. busby
    Replies:
    14
    Views:
    496
  3. Ains-campers
    Replies:
    17
    Views:
    1,324
  4. dulvil
    Replies:
    19
    Views:
    782
  5. Targetpaster
    Replies:
    6
    Views:
    375

Share This Page