2 12 volt batterys or 2 6 volt

If you could get 12V batteries built as well as the 6V batteries, there would be absolutely no difference in longevity or performance.

The way things are in the market, there is absolutely no comparison between 12V deep cycle batteries and 6V golf cart batteries.

Rhigley wrote:
not sure what works better.

let us know when you decided, at least you'll have had experience with both ;)

I would go with 12V... if and only if the battery is an AGM version, or the Battery is a 12V golf cart variety like a Trojan T-1275 or like type of battery.

If none of the above parameters can be met, then I would, for best value for dollar spent to number of recharges received, if properly maintained, go with 6V GC2 batteries.

This question comes up almost every day, perhaps use the search function and your time for a larger sample size of opinions.

korbe wrote:
My goal was to maximize amp hours with existing battery compartment storage area for 2 batteries. I went with 2 6-volt Trojan batteries. That setup gave me the best bang for my buck.

And certainly a viable solution in your case presuming you've already established that the characteristics of dual 6 volt deep cycle batteries suit your particular needs best. However, it's evident the OP is relying on others to tell him what's "best" without even telling us how he intends to use and maintain these batteries or even what space he has available to mount them. Your Trojans are a good example as the T-105 6 volt deep cycle battery is a great choice for those who regularly dry camp and expect deep discharge capability over many cycles, but the company also offers a great 12 volt SC series designed specifically for RV use where deep discharging isn't as frequent but the ability to handle heavy loads with minimal voltage drop under load (such as when powering an inverter) is more important. The devil is in the details so until the OP spells out the details for his particular situation no one can tell him what's "best".

FWIW, I'm in the latter group as we typically only dry camp either because campground power has failed for one reason or another OR there aren't any electric sites available. During those occasions I do expect to still power a few appliances in our camper using my 1000 watt inverter so the ability of the battery bank to sustain heavy but brief loads is far more important to me than the ability to sustain deep discharging over many cycles. For this reason, when it comes time to upgrade my own battery setup, I'll be installing a pair of G31 12 volt jugs which together will have a similar AH rating as a pair of 6 volt GG-2s. Certainly it would be easier to mount a pair of 6 volts on the tongue due to their dimensions but I do have the room for the G31s and in my case, for how I intend to use them, dual 12s are a better choice than dual 6s.

My goal was to maximize amp hours with existing battery compartment storage area for 2 batteries. I went with 2 6-volt Trojan batteries. That setup gave me the best bang for my buck.

Rhigley wrote:
what gives me the most bang for my money. every other rig that I have bought always had 6 volt battery's but the new one has 2 12 volt. not sure what works better.

Over the past 20 years, I've had 12'ers, then I had 6'ers, and now I'm back to 12'ers.
And w/o getting all technical,....picking each one apart for stupid little reasons, if you do not abuse them, keep them watered and charged, you will not find a dimes worth of difference between 6 & 12.
So whichever is the most AHs for the money, go for it.

Using the existing gives the best value.
Spend the money on 200 watts of solar for best performance. :B

Well.
Yer gonna find out. Whichever works best for you is the Smart Choice. You already have experience with 3-cell GC220 batteries. Compare then judge.

I just installed (4) 6 volt batteries in my modified battery compartment that formerly held (2) 12 volt batteries. I would have changed to (2) 6 volt batteries if that was my only option, but. . .

I was warned about not having a bit of redundancy if one battery should fail, OK with (2) 12 volt batteries, but not so good with (2) 6 volt batteries?

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