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Dual battery hookup

Budman1962
Explorer
Explorer
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?
2000 F250 V10
2006 Aljo 25ft.
1998 Yamaha GP1200
2000 Polaris Genesis
1994 Kawasaki St750
2006 Polaris X2
1986 Honda Magna
17 REPLIES 17

coolbreeze01
Explorer
Explorer
I've used pos on one battery and neg on the other with several RV's.
2008 Ram 3500 With a Really Strong Tractor Motor...........
LB, SRW, 4X4, 6-Speed Auto, 3.73, Prodigy P3, Blue Ox Sway Pro........
2014 Sandsport 26FBSL

Budman1962
Explorer
Explorer
Is balanced wiring the way I had it or my brother in law?
2000 F250 V10
2006 Aljo 25ft.
1998 Yamaha GP1200
2000 Polaris Genesis
1994 Kawasaki St750
2006 Polaris X2
1986 Honda Magna

2oldman
Explorer II
Explorer II
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?
"If I'm wearing long pants, I'm too far north" - 2oldman