Forum Discussion

Gator48's avatar
Gator48
Explorer
Oct 31, 2013

Battery problems???

Last week on a trip to Missouri we had house battery problems. After being plugged up all night then hitting the road the Not so cold would start beeping "no AC" after less than 1 hour on the inverter. The inverter shut off from "low battery". Starting the generator would solve the problem until we could reconnect to shore power.

Today I checked the batteries and got 12.6V on each of them. I turned the fridge on and within 45 minutes I was at 11.4V on each battery and dropping.

I plugged the coach back in and the charger jumped to 14V bulk charge.

I don't have a load style tester but it looks like my 2009 Walmart Evermax marine batteries are not storing enough energy. They are getting to 13V after charging but drop like a rock when they get the 475 watt load from the fridge.

Is it agreed the batteries need replacing? if so, which 12V deep discharge are the best for the money?
Class A

15 Replies

Show More
  • Cobra21's avatar
    Cobra21
    Explorer
    Oct 31, 2013
    Your batteries are 5 years old, I wouldn't even test them.
    5 years is about all the longer these wet cells last anymore.
    And honestly, I've had just as good of luck with Menards or
    Walmart batteries as I've had with Interstate.
    That's just my 2 cents, Brian
  • Bobbo's avatar
    Bobbo
    Explorer III
    Oct 31, 2013
    Take the batteries to an automotive parts place for a load test. It is free.

    I just bought this 500 amp carbon pile load tester from Harbor Freight so I can test mine at home. It was $67.71 delivered to my door.

  • Mandalay_Parr's avatar
    Mandalay_Parr
    Explorer
    Oct 31, 2013
    Mandalay Parr wrote:
    After 14 years, I would say so. How long does the battery in you car last?
    I have 4 6volt batteries and change them after about 4-5 years.


    Sorry, don't know where I got 14. I must be loosing it

    Jerry
  • 2oldman's avatar
    2oldman
    Explorer II
    Oct 31, 2013
    Gator48 wrote:
    which 12V deep discharge are the best for the money?
    Almost anything except Walmart. Why are you running your refer on inverter?
    Mandalay Parr wrote:
    After 14 years, I would say so. How long does the battery in you car last?
    2013-2009= 4.
  • Mandalay_Parr's avatar
    Mandalay_Parr
    Explorer
    Oct 31, 2013
    After 14 years, I would say so. How long does the battery in you car last?
    I have 4 6volt batteries and change them after about 4-5 years.

About Motorhome Group

38,768 PostsLatest Activity: Dec 18, 2017