Forum Discussion

Diesel_Camper's avatar
Diesel_Camper
Explorer
Jan 24, 2016

New Golf Cart Batteries, Died quicker than anticipated...

I recently upgraded from 2 12 volt marine cranking batteries to 2 6 volt golf cart batteries rated at 210AH. I was dry camping last week and it seemed like the batteries died out faster than they should have, but I'm hoping it had more to do with the temperature (about 40F) and the fact that I didn't reinstall the battery cut out switch and I powered the landing gear and slide from the house batteries while setting up...

Questions:

1. How much capacity will I loose at 40F?

2. I'm guessing the landing gear and the slide probably cost us a couple of days of battery power for our LED lighting and occasional use of the inverter for a DVD player; along with the regular loads of the frige and the LPG monitor?
  • okan-star's avatar
    okan-star
    Explorer
    Jan 24, 2016
    DownTheAvenue wrote:
    sfpcservice wrote:
    I recently upgraded from 2 12 volt marine cranking batteries to 2 6 volt golf cart batteries rated at 210AH.


    And therein lies your problem. With 12 volt batteries, you double your amp hours when connecting two batteries. With 6 volt batteries, the amp hours of both batteries remains constant while the volts double.

    So, if you had two 210AH 12 volt batteries, you had 410 AH of juice. With the two 210AH 6 volt batteries, you had 210AH of juice.

    IMHO, 12 volt batteries are always a better choice.



    Have to disagree with thatlook here
  • midnightsadie's avatar
    midnightsadie
    Explorer II
    Jan 24, 2016
    are you sure they were charged? IF you just installed them and then went camping,they were not fully charged.
  • azjeffh's avatar
    azjeffh
    Explorer
    Jan 24, 2016
    sh410 wrote:


    Finding 12V 210AH batteries can be a problem, if they even exist. Can ou provide a link for a 12V 210AH battery?

    Didn't try to purchase them, but they may be available here. Great price as well ;)
  • Diesel_Camper's avatar
    Diesel_Camper
    Explorer
    Jan 24, 2016
    Interesting.... I had always read that changing out to 6 volt batteries was the gold standard of RV power...
  • sh410's avatar
    sh410
    Explorer
    Jan 24, 2016
    DownTheAvenue wrote:


    And therein lies your problem. With 12 volt batteries, you double your amp hours when connecting two batteries. With 6 volt batteries, the amp hours of both batteries remains constant while the volts double.

    So, if you had two 210AH 12 volt batteries, you had 410 AH of juice. With the two 210AH 6 volt batteries, you had 210AH of juice.

    IMHO, 12 volt batteries are always a better choice.


    Finding 12V 210AH batteries can be a problem, if they even exist. Can ou provide a link for a 12V 210AH battery?

    The advantage of 6V batteries is they fit with the same footprint of a Group 24 battery.
  • DownTheAvenue's avatar
    DownTheAvenue
    Explorer
    Jan 24, 2016
    sfpcservice wrote:
    I recently upgraded from 2 12 volt marine cranking batteries to 2 6 volt golf cart batteries rated at 210AH.


    And therein lies your problem. With 12 volt batteries, you double your amp hours when connecting two batteries. With 6 volt batteries, the amp hours of both batteries remains constant while the volts double.

    So, if you had two 210AH 12 volt batteries, you had 410 AH of juice. With the two 210AH 6 volt batteries, you had 210AH of juice.

    IMHO, 12 volt batteries are always a better choice.

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