dockmasterdave wrote:
I am wondering some of the same things. 1 thought that comes to my mind is, if I have 2 6v batteries and 1 goes bad, I have nothing.
If I have 2 12v batteries and 1 goes bad, I have less amp hours, but my rig will still operate.
Not much help to you I guess. I'll be watching the replies.
I hear this reasoning all the time but I don't get it. How would you know that one of your parallel 12v batteries went bad? If it does drop a cell it will likely make the charger work that much harder cooking the good battery in short order. Or, if not under charge, it will drain the good battery; still leaving you with nothing.
Unless you're willing to unhook your 12v loads completely, separate your batteries, and measure their individual voltage several times a day to determine their health, and disconnect the low one at the first sign of a problem then there is no advantage in this way.
I for one have much more important things to do when camping then to check my batteries 10 times a day.
1 failed 12v battery in parallel will generally lead to 2 failed 12v batteries in parallel very quickly.