Adding a second battery?
My new to me TT has a 12V Interstate deep cycle marine/rv battery, spm-24. Looked on line and it offers 140 min. at 25A and it looks like I'm could use as much as 10 amps an hour without the furnace ...
Forum Discussion
Biggest problem with 2 12V batteries in parallel is it's hard to find true deep cycle 12V batteries. And they are much more expensive than a 6V golf cart battery.
The so called "deep cycle" battery the dealer puts in a trailer (usually a Group 24) is not a true deep cycle battery.
It's a hybrid or marine deep cycle battery. It combines some of the attributes of a deep cycle battery with some of the attributes of a starter battery.
That's why I pulled the 12V Group 24 battery in my trailer and replaced it with a pair of GC 6V batteries which are true deep cycle batteries.
The so called "deep cycle" battery the dealer puts in a trailer (usually a Group 24) is not a true deep cycle battery.
It's a hybrid or marine deep cycle battery. It combines some of the attributes of a deep cycle battery with some of the attributes of a starter battery.
That's why I pulled the 12V Group 24 battery in my trailer and replaced it with a pair of GC 6V batteries which are true deep cycle batteries.
Tiggs wrote:
I do understand 12v = two 6 volts wired in series. I do get it. I've already done some wiring to power the 12V exhaust fan I installed in the roof of my conversion van doing just that. I've also run 12 power to various points to power other 12V aux. fans when I must leave the dogs in the van without the motor running. I've also replaced the TV with a microwave and wired the van for 120 amp service to it and 4 plugs so I do understand enough to get by.
What I'm trying to decide is if I would be better off to go with two 12 volts wired in parallel or two 6 volts wired in series. I was hoping for an explanation of why, as Matt has touched on, the 6 volt batteries are a better choice. Economically, it would seem to be adding a second 12V would have been the better choice short term, but long term I think, as Matt suggested, 6 volt golf cart batteries or similiar are the way to go.
Carolyn
