Forum Discussion

Budman1962's avatar
Budman1962
Explorer
Aug 06, 2016

Dual battery hookup

I bought my TT 10 years ago this month. When I bought it the RV store showed me how to hook up two 12v batteries. he jumpered the batteries together positive to positive and negative to negative. Then he hooked the TT leads to one battery.Today my brother in law says "Your batteries are hooked up wrong." He said the TT leads should be one on each battery. I looked online and most sites say he is right. but there are a few that show it the way I have it. What is the proper way and what are the advantages of doing it that way?
  • pianotuna's avatar
    pianotuna
    Nomad III
    Aug 06, 2016
    This is what is balanced and best for twin twelve volt batteries.



    As it often doesn't cost a dime more to do this, I think it is worth the trouble.
  • Bumpyroad's avatar
    Bumpyroad
    Explorer
    Aug 06, 2016
    I have never hooked my 12 volters that way. I have had no issues. yes, it is probably better however, but my cables wouldn't reach and I am sure I won't spend the $$$ to get longer cables.
    bumpy
  • 2oldman's avatar
    2oldman
    Explorer II
    Aug 06, 2016
    Budman1962 wrote:
    Is balanced wiring the way I had it or my brother in law?
    I said "What BIL said"
  • westend's avatar
    westend
    Explorer
    Aug 06, 2016
    The BIL is right. Buy him a couple of beers, he has saved you at least that much in battery longevity.
  • 2oldman's avatar
    2oldman
    Explorer II
    Aug 06, 2016
    Balanced wiring (what BIL says) is generally accepted around here as the proper way. Whether it makes any difference over time is debatable, but, it costs nothing to do it that way so why not?

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