Dual 12v Battery Hookup Question
Purchased 2 new 27 series 12v batteries, added 2nd battery box and have them both vented to outside. Hooked Positive to Positive and Negative to Negative. Question is do I hook Pos and Neg from campe...
Forum Discussion
dballentine wrote:Old-Biscuit wrote:
Positive from one battery to converter/dc distribution
Negative from other battery to frame ground
Why?
Both positive terminals are at the same potential, as are both negative terminals. (Ignoring I2R loss in the interconnecting cables.)
I would think connecting the positive from the converter to either battery (or midway between the two, for that matter), and the negative (ground) to either battery, would work as well.
It will work. Just not as well over time. Resistance of the cables is small but so is the internal resistance of the battery so it does end up having an accumulated effect of working one battery harder than the other. The higher the load the greater the effect. The more batteries the more the effect will be.
If you pull power for a large inverter off one end of a stack of four batteries. The lead (close) battery will initially handle twice the load of the tail (farthest) battery.
