Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

dual battery set-up

Discussion in 'The Garage' started by Hannibal, May 30, 2005.

  1. Hannibal

    Hannibal Registered Member

    Joined:
    May 30, 2005
    Posts:
    34
    Likes Received:
    0
    Location:
    BC Canada
    I run a 140amp alternator and have 2 batteries hooked up through a solonoid. It just don't seem to charge right. Any ideas on best way to run dual batteries?
     
  2. divorced

    divorced 3/4 ton status

    Joined:
    Jul 20, 2004
    Posts:
    5,115
    Likes Received:
    0
    Location:
    .
    Many people will just hook them together parallel (pos to pos, neg to neg). Below is a diagram I made of how I will hook mine up. I will have one main battery and a bank of three batteries as the "secondary" battery. When the ignition is turned on the batteries will be connected and both will start the vehicle and both will charge. When you turn the key off the batteries will disconnect from each other and the secondary battery will be isolated from the vehicle so it won't/can't discharge. I can use the secondary battery to jump start the primary if I have to. You will need to use a "hot through start" ignition source to the solenoid, and the manual switch is for jump starting yourself.

    [​IMG]
     
  3. 78blazaer

    78blazaer Registered Member

    Joined:
    Aug 15, 2002
    Posts:
    36
    Likes Received:
    0
    Hmm, I just installed a dual battery on my K5 using Painless battery separator.
    I like a lot. It saved me once. What I like about this kit is that it allows me to choose whether to use two batteries ( primary and secondary) or just one battery (primary). The circuitry is designed so that when the vehicle is running, it automatically charges both batteries, and when its not running, it automatically disconnects the secondary battery. This way if you have draw somewhere from your electrical accessories, it won't drain both of your battery. The secondary battery is isolated. However there is a manual override switch where you can toggle between single to dual battery operation. The idea is, winch all you can on the primary battery, and if you completely drain your primary battery, you can always switch to the secondary. Never winch on both batteries unless you really have to and if the load requires more amps to get you out of the rut. Enjoy.

    If you have a minute, check out my winch and dual battery project.
    http://community.webshots.com/photo/246000292/292913072PTEGMS
    http://community.webshots.com/photo/246000292/292913121UKGxlY
    http://community.webshots.com/photo/246000292/292913158GlwysN
    http://community.webshots.com/photo/246000292/292913198rktQBb
    http://community.webshots.com/photo/246000292/292913247fxVXgD
    http://community.webshots.com/photo/246000292/292913293ZaLvIX
    http://community.webshots.com/photo/246000292/292913330oUSXXA
     
  4. garlicbreath

    garlicbreath 1/2 ton status

    Joined:
    May 17, 2003
    Posts:
    1,136
    Likes Received:
    0
    Location:
    Denver
    How about a marine dual battery switch? It lets you manually pic one, or both batteries and you can turn them both "off" if you park for a while.

    battery-switches-p50678.jpg
     
  5. 88sub4x4

    88sub4x4 1/2 ton status

    Joined:
    Sep 22, 2002
    Posts:
    792
    Likes Received:
    0
    Location:
    Long Island, NY
    A 140A alt is more then enough to keep 2 batteries charged. Sounds like you have a charging circuit problem, or an excessive drain somewhere.
     
  6. Hannibal

    Hannibal Registered Member

    Joined:
    May 30, 2005
    Posts:
    34
    Likes Received:
    0
    Location:
    BC Canada
    I agree, I'm gonna hook-up a volt or ammeter to see if draws from an accessory somewhere, and of-course clean every dang connection.
     
  7. louied

    louied Registered Member

    Joined:
    Mar 19, 2002
    Posts:
    84
    Likes Received:
    0
    Location:
    Philadelphia
    my experience is you need to use the same batteries on both sides, because the charging rates are different.
     
  8. fireplug

    fireplug 1/2 ton status

    Joined:
    May 3, 2005
    Posts:
    1,692
    Likes Received:
    0
    Location:
    Toronto, Canada
  9. MTMike

    MTMike 1/2 ton status

    Joined:
    Feb 10, 2005
    Posts:
    2,992
    Likes Received:
    0
    Location:
    Billings, Montana
    I've got a Hellroaring setup just waiting to go in... :waytogo:
     
  10. keith

    keith 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,158
    Likes Received:
    1
    Location:
    La Fayette, GA
  11. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

    Joined:
    May 19, 2001
    Posts:
    45,030
    Likes Received:
    366
    Location:
    Vancouver, WA, USA
    what he said... wouldn't that work? personally, I don't want all kinds of whizbang capabilities and nifty bling bling features I'll never use, off/1/2/1+2 is plenty of adjustability for me. Anyone use a marine switch like that?

    I was thinking of something like this...

    [​IMG]

    it has a 350 amp continuous rating... or if thats over kill, they have a cool keyed one that can handle 250a cont...

    [​IMG]

    j
     
  12. seschev3

    seschev3 1/2 ton status

    Joined:
    Jan 19, 2005
    Posts:
    308
    Likes Received:
    0
    Location:
    clayton, ca
    I also have a 140 amp alt and I run 3 optima yellow tops. I used a battery isolator which keeps all three batterys seperate. I run one for start up and stock acc., one for exterior power ( like lights, air horns, anything add on under the hood or a winch), and one for my stereo system so I can run it dead and not worry about starting the rig. Plus it allows me to jump start myself by connecting the posts on the isolator. Just another option. I think I paid around $130 for the isolator from JC Whitney. and like mentioned earlier, you should run the same type of battery so they don't discharge each other or over charge.
     
  13. garlicbreath

    garlicbreath 1/2 ton status

    Joined:
    May 17, 2003
    Posts:
    1,136
    Likes Received:
    0
    Location:
    Denver
    If you keep all 3 seperate, how do you charge them?
     
  14. louied

    louied Registered Member

    Joined:
    Mar 19, 2002
    Posts:
    84
    Likes Received:
    0
    Location:
    Philadelphia
    sweet set up!! what is the relay u are using? How do u like the set up?
     
  15. keith

    keith 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,158
    Likes Received:
    1
    Location:
    La Fayette, GA
    I got the Painless Wiring 250 amp kit. Still got to mount the switch. I plan to upgrade the battery cables with heavier gauge and shorten them too. those are all 2 gauge and should work fine though
     
  16. louied

    louied Registered Member

    Joined:
    Mar 19, 2002
    Posts:
    84
    Likes Received:
    0
    Location:
    Philadelphia
    it looks like u have a starter solenoid at the bottom of the innner fender?

    how much was the kit?
     
  17. louied

    louied Registered Member

    Joined:
    Mar 19, 2002
    Posts:
    84
    Likes Received:
    0
    Location:
    Philadelphia


    i have a pac-200 relay on the firewall.

    to be sorted and filed 036.jpg
     
  18. seschev3

    seschev3 1/2 ton status

    Joined:
    Jan 19, 2005
    Posts:
    308
    Likes Received:
    0
    Location:
    clayton, ca
    It is an isolator which is basically huge diodes. So the batterries are seperated but all charge from the alternator. There are no relays necessary.
    I used to run the solonoids like some of you others are running when I ran 2 batts. But with 3 I needed to go with an isolator set up.
     
  19. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

    Joined:
    Dec 24, 2003
    Posts:
    4,395
    Likes Received:
    50
    Location:
    VA
    I use the set up from wranglerNW. It's a great system and has a neat in cab toggle switch for different functions. www.wranglernw.com
     
  20. keith

    keith 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,158
    Likes Received:
    1
    Location:
    La Fayette, GA
    Yes a did move the starter solenoid up from the starter to the inner fender.
     

Share This Page