Wiring Two 6 Volt Batteries on a Trailer In Parallel or in Series

Updated 03/25/2014 | Published 03/22/2014

Question:

hooking two six volt batteries in parallel to the trailer Does it matter what the progression of hooking the wires from the trailer to the batteries?

asked by: Michael

Expert Reply:

I have included a diagram that shows the two ways in which 2 batteries can be wired together. Having two 6 volt batteries wired in parallel will produce 6 volts still but increases the capacity.

The other way is to wire two 6 volt batteries in series which would double the output to 12 volts but the capacity remains the same.

In either case the output side would go to the power wire on the trailer to power trailer mounted accessories.

expert reply by: Michael H