What gauge wire needed to parallel 12v deep cycles
What gauge wire do I want to parallel two deep cycle group 27 batteries? The system will run through a 1200 watt inverter. Thanks
Forum Discussion
pnichols wrote:wa8yxm wrote:
You use at least the LARGEST cable hooked to the battery.. Figure either battery may be called upon to deliver the total current of the load should it's partner fail "High Resistance" so the biggest cable is the jumper size.
That's almost the perfect correct answer.
Since my two 12 volt RV batteries are hooked up in balanced fashion, I used DOUBLE (two each) large cables between the negatives and DOUBLE (two each) large cables between the positives of the two batteries to ensure that the balance between them was even closer to being absolutely perfect.
The goal is to have two (or more) 12V batteries function as one larger 12 volt battery under all conditions - of charging them or drawing current from them.
The large gauge cables I used were pre-made short ones with lugs on each end like what you can purchase at an auto parts store. They weren't expensive.
I was doing some work for a friend last night who builds auto electric parts. In one of his trash tubs I found 4- 4AWG cords with teh ring ends on them. Two cords were about 15" and two were about 2'. A friend who is an electrician told me the 4 AWF is good for 1000 watts. When I I told him I had a 1200 watt inverter that could take a 2400 surge, he suggested I used two cables per terminal.
Later in the night I found a 30" piece of 3/0 Heavy duty welding cable
