I replaced my 2 house 4D batteries the other day with 4 6V batteries wired into 2 house banks. Each house bank is now 230AH and I normally have both banks on line to the main DC panel or to the inverter
when I want to run that.
When I did this I had to make-up the jumper between the 6V batteries to place them in series for each bank. I also had to make a jumper for the negative cable because it was in a different location.
The series jumper is 6 inches long and the negative jumper is 21" long. Both I did with 1/0 cable because there was a chart at the store that said it was good for 150 amps for up to 6 feet length. But the rest of the battery
cabling, positive and negative, are 2/0 and each postive has a 300 amp fuse at the battery
Now I'm starting to question my use of the 1/0 instead of matching the 2/0 cabling that the rest of the length has.
The biggest draw I could do would be to use the mircrowave off the 1500watt inverter
. And it is always possible that I could do this off a single
battery bank so all the power goes thought the 2 short 1/0 cable.
Am I being too parnoid? Or should that short length of 1/0 be more than enough, which is what I believed at the time?