Adding second leisure battery - different controller needed?

Discussion in 'Tech/Mech General' started by Melchior, Mar 13, 2014.

  1. Melchior

    Melchior Read Only Funster

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    Hello chaps and chapesses,

    I want to add a second leisure battery to our Knaus. As standard it (I think obviously!) has two batteries, one for the engine and one leisure.

    At first I thought I can just add the second one and connect it in parallel to the existing one. Then I wonder if actually it's better to change the charger control unit thing to one which can look after the 3 batteries (in case one starts failing, you'd never really know if you keep the 2 battery controller)

    Thoughts, experiences... please share :)

    M
     
  2. Reallyretired

    Reallyretired Funster

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    Just wire it in parallel with the existing leisure battery, with a suitable fuse in the line. No need to change charger or controller.
     
  3. Boycie

    Boycie Funster

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  4. mapa

    mapa Read Only Funster

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    You are always better using 2 batteries in parallel rather than using batteries singly and changing when one goes flat. The reason is that batteries last longer if they are discharged slowly and evenly, and running a battery down low will drastically shorten it's life. Make sure both batteries are as close to identical as possible I.e same ahc and same construction type.
     
  5. DonA4000

    DonA4000 Funster

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    Also do you have to keep it within the charger limits? My knaus original charger (LG 616) Battery capacity: 50 Ah – 160 Ah
     
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