Help need to add a second leisure battery

Discussion in 'Tech/Mech General' started by Michelle CV, Jan 2, 2016.

  1. Michelle CV

    Michelle CV

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    Hi, just wondered if anyone can give me any advice re adding a second leisure battery. The one fitted is a Varta Dual Purpose Gel battery, (90amp) and it is under the driver's seat. There appears to be space in front of it to add another. Please can you help me understand how to wire the batteries together and also advise me re battery purchase. Thank you.
     
  2. peter marshall

    peter marshall

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    Hi
    The battery should match else they will only charge to the lower ampage one. you wire plus to plus and negative to negative. you can had an inline fuse. I have done 3 without and they have been ok. Pete
     
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  3. Techno

    Techno Funster Life Member

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    In parallel +ve to +ve and -ve to -ve

    Take the load off opposite corners. This picture is showing two batteries that connect to two further batteries so the cables leaving through the hole are not the load but additional interconnects.

    [​IMG]
     
    Last edited: Jan 2, 2016
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  4. pappajohn

    pappajohn Funster Life Member

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    Make sure the second battery is also a gell battery.
    They have a different charge requirement to flooded acid batteries.

    Capacity doesnt matter as the charger only sees one large battery, not a big un and a small un.
    A 90ah and a 110ah will be seen as one 200ah battery by the charger.

    Age, on the other hand, does matter though.
    An older battery wont be as efficient at taking a charge as a new one and the total capacity will be lower than expected.
     
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  5. Lenny HB

    Lenny HB Funster

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    For a start Varta don't make 90A/H Gel battery, If it is a Gel battery it is most likely to be an Exide G80 or a Sonnenschein SL75 both the same, both made by Sonnenschein. You need to check which type of battery you have and if more than a year old best to fit 2 new batteries.
    Tanya Batteries keep a good range at competitive prices and if buying 2 will do a deal on the carriage.
     
  6. Michelle CV

    Michelle CV

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    I was told it was a gel battery - the van was registered new in September but I guess it might have been in the showroom for some months. On further investigation is is a Varta professional dual purpose agm. It says 85 - 95. Would it be better to buy two new batteries?
     
  7. pappajohn

    pappajohn Funster Life Member

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    At 3 months old there will be nothing wrong with the existing battery.
    Just buy one new one but make sure its an AGM battery....again, capacity is not an issue as long as it fits in the hole.
     
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  8. Lenny HB

    Lenny HB Funster

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    Is it by any chance a Hymer?
    Check the charger has a AGM setting.
    My Hymer had 2 x Banner AGM batteries both failed in 18 months I have replaced them with Gels, if you charger does not have an AGM setting I would get rid of the AGM battery, loads of reports on German forums of Banner & Varta AGM batteries failing in Hymers.
     
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  9. Michelle CV

    Michelle CV

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    Hi Lenny

    No its a Dethleffs which is part of the same group so it could be a problem. No sure where to find out about the battery charger and its settings - hubby just trying to find the instruction manual now to check - I would think then that 2 new gels might be the way to go because there is no outside venting from under the driver's seat for lead acid
     
  10. pappajohn

    pappajohn Funster Life Member

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    Or put a thread on here to sell it.
    It should sell quickly and get you a bit of money back.
     
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  11. Michelle CV

    Michelle CV

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    The battery selector switch is lead acid/dryfill so not sure about AGM but surely the manufacturer wouldn't put in the wrong type of battery?
     
  12. Lenny HB

    Lenny HB Funster

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    This is what the switch looks like on an Elektroblock EBL29 & EBL101 this is for Wet cell & Gel only, it is on the R/H side.

    upload_2016-1-2_15-59-35.png
     
  13. Lenny HB

    Lenny HB Funster

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    n
    Yes they would, the Hymer group started fitting AGM's about 3-4 years ago and only mid 2015 did Schaudt have an Elektroblock capable of correctly charging them.
     
  14. pappajohn

    pappajohn Funster Life Member

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    AGM stands for absorbed glass mat which means the acid is soaked into the matting to keep it in close contact with the plates.
    It is a wet lead acid but not sure about the charge regime needed.

    A Gell is just that...the acid is in a gell form, sticks to the plates and cant be spilt but needs a special charge regime.
     
  15. DavidG58

    DavidG58 Funster

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    If there is enough doubt that it might have been wrong from brand new, only a few months ago, I would be going back to the supplying dealer to get the battery changed, it might be worth paying them to do the extra battery at the same time for peace of mind, there is a lot of expensive kit further down the cables if you get it wrong :)(y)
     
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  16. pappajohn

    pappajohn Funster Life Member

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    Your charger needs setting, if it isnt already, to 'dry cell' for AGM batteries according to this extract.

    There is a some common confusion regarding AGM batteries because different manufactures call them by different names; some of the more common names are "sealed regulated valve", "dry cell", "non spillable", and "Valve Regulated Lead Acid" batteries. In most cases AGM batteries will give greater life span and greater cycle life than a wet cell battery. - See more at: http://www.batterystuff.com/kb/articles/battery-articles/battery-basics.html#2
     
  17. Michelle CV

    Michelle CV

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    1. ,
    It is set to blei-Gel (translated as dryfill in our instruction manual)
     
  18. Michelle CV

    Michelle CV

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    How would we Know if we have the correct Schaudt Electroblock - we have a Schaudt EBL 101D
     
  19. Michelle CV

    Michelle CV

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    Just been looking an to buy the same battery as we have fitted is £221 - seems so expensive
     
  20. The Wino

    The Wino Funster

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    Looking at a second one also for our chausson transit base. The existing one sits under the passenger seat looks like a second will fit but the bracket to support it would need to be changed or would they sit without one when 2 are fitted and no space left?. Battery 2 years old tempted to just stick one in rather than go for 2 new ones no known problems.
     
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