24 volt charging question.

  • Kevin J Dobbs
    La Crosse. WI
    Posts: 78
    May 19, 2006 at 10:48 pm #1250245

    My trolling motor batteries are set up for 24 volts right now,my question is can I use my 12 volt charger to charge both batteries without unhooking anything.I thought I could put the charger on one battery and it would charge both?

    robby
    Quad Cities
    Posts: 2823
    May 19, 2006 at 11:24 pm #447776

    I believe you will have to charge these batteries individually, but you should not have to unhook your jumper.

    amwatson
    Holmen,WI
    Posts: 5130
    May 20, 2006 at 1:42 am #447787

    From my experience, you DO have to unhook the jumper cable. I tried charging batteries hooked 24v by hooking the charger to one battery and I fried a battery Not sure if this was an isolated incident, but I wouldn’t take the chance.

    david_scott
    Twin Cities
    Posts: 2946
    May 20, 2006 at 1:44 am #447788

    Robby is correct. I unhook my jumper anyway when I am charging.. not sure why!

    Do not charge the batteries by hooking them in parallel with jumpers(++/–) unless they are drawn down exactly the same. I have had batteries overcharge on me while one battery still needed juice. Charge them one at a time unless you have an on-board charger set up for seperate batteries.

    david_scott
    Twin Cities
    Posts: 2946
    May 20, 2006 at 1:47 am #447790

    AM watson..

    I am quite sure that was an isolated incident. You can still hook 12v electronics to one battery of the 2 hooked in series(24v) and still get 12v.

    moler02
    Iowa, Knoxville
    Posts: 525
    May 20, 2006 at 3:21 am #447811

    You shouldn’t have to unhook the jumper.

    pyake
    Posts: 167
    May 20, 2006 at 9:28 pm #447885

    I have a 2 battery trolling motor arrangement and a 2 bank charger. One bank is hooked up to each trolling battery. I am rigged to run 24V (series), or 12V (2 batteries in parralel). I can charge the batteries in either configuration. I did check with the charger supplier to confirm that this was OK and they agreed.

    haywardbound
    New Brighton, MN
    Posts: 1107
    May 20, 2006 at 10:44 pm #447888

    So if I have to jump start my starting battery, can I just hook it up to one of the trolling motor batteries?

    pyake
    Posts: 167
    May 21, 2006 at 12:29 pm #447919

    Not sure how well jumping off of a trolling battery would work. A deep cycle battery has thicker plates and is designed for long duration, low amp draw. A cranking battery which has thin plates, and delivers high amps for short duration.

    If I was on the boat landing, I would probably jump off of another boat, or off of my truck. If I was stuck in the middle of the lake, I wouldn’t hesitate to hook up a single trolling battery in place of the starting battery and try to crank.

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