6v or 12v batteries

Discussion in 'Motorhome Chat' started by Patrick, Jul 31, 2010.

  1. Patrick

    Patrick Read Only Funster

    Joined:
    Nov 18, 2007
    Messages:
    370
    Likes Received:
    10
    Location:
    Liverpool
    What’s the view's over this?

    I am looking at putting 2 x 6volt Trojan’s on my van rather than replacing the 12 volts.
     
  2. Bryan

    Bryan Read Only Funster

    Joined:
    Jul 19, 2007
    Messages:
    2,096
    Likes Received:
    342
    2 x 6v trojans = 1 12v battery.

    What amps are the trojans and what amps are the 12v you are replacing?
     
  3. Patrick

    Patrick Read Only Funster

    Joined:
    Nov 18, 2007
    Messages:
    370
    Likes Received:
    10
    Location:
    Liverpool
    Hi Bryan!

    getting rid of the 2 x 220amp elcsol

    want to replace with 2 x T105 Trojans.

    T105 6 Volt. 225ah @ 20HR
    185ah @ 5HR
    Reverve Capacity in minutes :- @25 amps - 447
    @75 amps - 115
     
  4. MikeandCarolyn

    MikeandCarolyn Read Only Funster

    Joined:
    Mar 18, 2008
    Messages:
    2,171
    Likes Received:
    1,463
    Location:
    Worle,North Somerset
    OK-tell me the advantages-are you getting more in a smaller space or the same in a smaller space ?
    I've been looking at batteries lately and couldn't understand the numbers with Trojan :Doh:

    Mike.
     
  5. dshague

    dshague Funster

    Joined:
    Aug 22, 2007
    Messages:
    904
    Likes Received:
    181
    Location:
    sth yorks
    i have a agm longlife 85 amp squadron battery fitted .squadron are not trading now ut there are some of there 6v batteries on ebay .
    are you saying you can put two 6v and run with 12v .ifso sounds good to me
    help from tec man required .:Eeek:
     
  6. Patrick

    Patrick Read Only Funster

    Joined:
    Nov 18, 2007
    Messages:
    370
    Likes Received:
    10
    Location:
    Liverpool
    Hi Mike,

    I don't understand the numbers either mate!
    I have just read so many good reviews about these batteries. My Elecsol that cost £ 500 squid are rubbish and one of them has gone dead after just 2 years. the Trogan's will give me the same 440 amp but they are true deep cycle. i was told 2 x 6volt would give longer performance than 2 x 12volt.
     
  7. DESCO

    DESCO Read Only Funster

    Joined:
    Mar 11, 2009
    Messages:
    2,651
    Likes Received:
    267
    Location:
    London
    Don't know how true but have always been told by people I respect for their knowledge that 2x6volt is the better way to go.


    Dave :thumb::thumb:
     
  8. Patrick

    Patrick Read Only Funster

    Joined:
    Nov 18, 2007
    Messages:
    370
    Likes Received:
    10
    Location:
    Liverpool
    Yer, you connect them in sequence instead of in parallel
     
  9. lunarman

    lunarman Funster

    Joined:
    Sep 23, 2008
    Messages:
    1,456
    Likes Received:
    872
    Location:
    South Glos
    My understanding is that connecting batteries in series, as you would have to do with the 6v to give 12 v, maintains the capacity.

    Thus 2 trojans in series would give you 225 amp hours capacity. Your 2 Ecosel 12v in parallel give you 440 amp hours capacity.

    Are you not halving your power availability.

    lunarman

    edit see here

    http://www.zbattery.com/Connecting-Batteries-in-Series-or-Parallel
     
  10. Patrick

    Patrick Read Only Funster

    Joined:
    Nov 18, 2007
    Messages:
    370
    Likes Received:
    10
    Location:
    Liverpool
    Yes i will be but getting a true 225 would be better than i felt i ever got from the Elecsols
     
  11. dshague

    dshague Funster

    Joined:
    Aug 22, 2007
    Messages:
    904
    Likes Received:
    181
    Location:
    sth yorks
  12. Blisters

    Blisters Read Only Funster

    Joined:
    Apr 2, 2008
    Messages:
    597
    Likes Received:
    3
    Location:
    Stoke on Trent
    Elecsol give a 5 year guarantee, so if yours has died after just 2 years, it might be worth having a word. Maybe it was a dodgy battery from the start, has we have 2, both 3 years old now and going strong.
     
  13. dazzer

    dazzer Read Only Funster

    Joined:
    Jul 30, 2007
    Messages:
    1,698
    Likes Received:
    99
    Location:
    In my house
    My understanding of it is that the 6v bats will give you a true 225ah as you can almost run them flat without damaging them. Standard 12v bats shouldnt be allowed to go below 50% capacity or it knackers them.

    Or so im lead to believe, personally id go with the 6 volt if youve got the space and weight capacity spare.
     
  14. Bryan

    Bryan Read Only Funster

    Joined:
    Jul 19, 2007
    Messages:
    2,096
    Likes Received:
    342
    Hi Pat,

    2 x 6v 225 ah batteries will give you 225 ah total
    2 x 12v 220 ah batteries will give you 440 ah total

    IIRC the trojans can be discharged to 20% before flat and the 'normal' batteries 50%

    So...

    2 x 6v, 225ah batteries gives 225 time 80% = 180 amp hours
    2 x 12v, 220ah batteries gives 440 times 50% = 220 amp hours

    Trojans are true deep cycle batteries so they should handle being deep discharged and recharged better.

    HTH

    Bryan
     
  15. ehuplad

    ehuplad Read Only Funster

    Joined:
    Feb 9, 2009
    Messages:
    509
    Likes Received:
    93
    Location:
    North Yorkshire

    Hi Patrick,

    We have 2 x 6v Trojan 105 batteries, had them on the RV we replaced 3 12v 110amp batteries, we have now also swopped them to the fiver, I personally think they are the best you can get, true deep cycle and you can get them at a decent price if you shop around.
     
  16. Patrick

    Patrick Read Only Funster

    Joined:
    Nov 18, 2007
    Messages:
    370
    Likes Received:
    10
    Location:
    Liverpool
    I will give them a call on Monday Graham; not very optimistic though, have been reading a lot about this company when it comes to there 5 year guarantee, it can take months of arguing with them.

    hope your all well?
     
  17. Terry

    Terry Funster

    Joined:
    Dec 27, 2007
    Messages:
    10,722
    Likes Received:
    6,224
    Location:
    South yorks
    Hi Patrick if I was you I would go for the cheapest FLA battery's I could find :thumb:
    Try
    http://www.olearymotorhomes.co.uk/
    or KNOLBECK CARAVANS 01226753956
    BOTH HAVE CHEAP PRICES FOR BATTERY'S BUT YOU WILL HAVE TO RING
    terry
     
  18. Ralph-n-Bev

    Ralph-n-Bev Funster

    Joined:
    Nov 30, 2009
    Messages:
    5,889
    Likes Received:
    8,606
    Location:
    Wrenthorpe, Wakefield.
    Hi there,
    we have 2 x 6 volt Trojan batteries. They are brilliant . We were advised to put them on because we have the Webasto diesel heating , which is also great in the winter . But not if you like rallying. As it soon ate the batteries.
    Remember that you have to have them in an outside locker or have them in a sealed battery box vented to the outside. As they gas off when being charged. Ours are inside , with 2 venting tubes to the outside .
    We have upgraded the on board battery charger , to a 50 amp 4 stage charger. So in the winter months we can plug the Honda in and give them a fast charge in under an hour. If needed.
    We have found that the really hold the charge for a lot longer than standard leisure batteries. We can easily go 2 full days/ weekend with the Webasto , TV's , and every other electric gadget teenagers love to use:Doh:
    Bev
    ( with a little help from Ralph on the techi bit:Blush: :Rofl1:)
    P.S ,
    OH and even better , we had our 2 Trojans given :thumb:
     
  19. MikeandCarolyn

    MikeandCarolyn Read Only Funster

    Joined:
    Mar 18, 2008
    Messages:
    2,171
    Likes Received:
    1,463
    Location:
    Worle,North Somerset
    I see that Trojan sell 6v and 12v-is there a difference that makes the 6 v a better option?
     
  20. Patrick

    Patrick Read Only Funster

    Joined:
    Nov 18, 2007
    Messages:
    370
    Likes Received:
    10
    Location:
    Liverpool
    Update on the Elecsol battery saga:

    I put both batteries on a mains charger for three days and they are now showing 14 on my control unit. When I tested them with the hydrometer it only showed as 125 just in the green area.

    I have put of phoning Elecsol until Iam sure they do have a problem. I believe that carbon-fiber batteries do show a lower level on a hydrometer than ordinary lead plate batteries.:Doh:

    Any thoughts on the above ??????

    Has anyone fitted a 50 Amp Sterling battery 2 battery charger…what do you think of the kit???????????
     
Loading...
Similar Threads
  1. Touchwood
    Replies:
    10
    Views:
    286
  2. Yorick
    Replies:
    39
    Views:
    601
  3. Brakers
    Replies:
    37
    Views:
    1,204
  4. dulvil
    Replies:
    19
    Views:
    782
  5. Targetpaster
    Replies:
    6
    Views:
    375

Share This Page