Thread: Looking for realistic AH requirements.

  1. #1
    Join Date
    Sep 2009
    Location
    North Idaho
    Posts
    842

    Default Looking for realistic AH requirements.

    I know this has been discussed before, please forgive me. My eyes are bleeding fro reading all of the other threads. Unfortunately, I cannot seem to stumble across the info I really need. Or its that i dont fully understand the lingo. Regardless..

    Im looking for a realistic AH requirement for my camper. Ideally I would like the house battery bank to support this load for 48 hrs on a charge.

    This is my proposed setup:

    Lighting: 12watts (1A) (6 hr per day)
    Radio: 24watts (2A) (4 hr per day)
    CO/LP monitor: 1watt (.09A) (24/7)
    Battery monitor: 1watt (.09A) (24/7)

    And the thirsty one...

    12vDC fridge: 40watt (3.34A) lets assume 2.5A average?? (24/7)



    With this said, could somebody please help calculate my AH needs.
    And any battery suggestions would be helpful.

    Thank you!!

  2. #2
    Join Date
    Aug 2011
    Location
    Cartersville, GA
    Posts
    1
    Quote Originally Posted by IdaSHO View Post
    I know this has been discussed before, please forgive me. My eyes are bleeding fro reading all of the other threads. Unfortunately, I cannot seem to stumble across the info I really need. Or its that i dont fully understand the lingo. Regardless..

    Im looking for a realistic AH requirement for my camper. Ideally I would like the house battery bank to support this load for 48 hrs on a charge.

    This is my proposed setup:

    Lighting: 12watts (1A) (6 hr per day) = 6ah/day
    Radio: 24watts (2A) (4 hr per day) = 8ah/day
    CO/LP monitor: 1watt (.09A) (24/7) =2.4ah/day
    Battery monitor: 1watt (.09A) (24/7) =2.4ah/day

    And the thirsty one...

    12vDC fridge: 40watt (3.34A) lets assume 2.5A average?? (24/7) = 60ah/day



    With this said, could somebody please help calculate my AH needs.
    And any battery suggestions would be helpful.

    Thank you!!
    Total 81 ah/day, 160 ah for 2 days
    You want to only discharge to 50% so you need 320 ah of battery. That's 4 6 volt golf cart batteries (464 ah or so for Interstate u2200).
    Less money - Sam'sClub. More money Lifeline AGMs.

    Joel

  3. #3
    Join Date
    Sep 2009
    Location
    North Idaho
    Posts
    842
    Thank you for helping the idiot.


  4. #4
    Join Date
    Feb 2007
    Location
    United States of America
    Posts
    6,098
    Quote Originally Posted by IdaSHO View Post
    12vDC fridge: 40watt (3.34A) lets assume 2.5A average?? (24/7)
    The fridge really will not pull that amperage 24/7. Hot or cool weather will affect how often it cycles but a better range to use is 20 to 28 Ah per day.
    Jim
    4x4 Tourist


    Trip reports are on my Blog: "Sun To The North"

    Two Favorite Expo Quotes: "A bad day on the trail is better than a good day in the city" & "Bad days make for GREAT stories!"

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