Replacing 12-volt batteries with 6-volt

If planning on a large inverter 12 volt jars may be a better choice.

Conservation by going to led bulbs is a good plan.

Use what ever format will result in the greatest number of amp-hours.

Add a modest solar charging system, your batteries will love you for doing so.

Group 24 about 75 ah
Group 27/29 just shy/over 100 AH
Group 31 about 130 AH
And you can use at most 25 Percent before rapid aging is starts

GC-2 pair about 220 amp hours give or take a dozen and you can use half.

marcsbigfoot20b27 wrote:
Yup kinda and I hated it.
Had one 12 volt from the factory.
Added two 6 volt GC2 batteries to power my inverter. . They constantly needed water and could not handle the draw from my 2000 watt psw inverter.

Swapped the whole thing to 3 AGM 12 volt deep cycle batteries in parallel and couldn’t be happier. My solar charges them faster also.

Define "constantly needed water". I have 4 GC2s and add a small amount of water about every 2 months. I suspect something is overcharging your batteries. Right after I put the batteries in (4 years ago now), they needed water regularly. Found out that the solar panel the PO installed have no controller and there was 19 volts going to the new batteries.

Had two 6 volt on the TT for 10 years still going strong. Now have 4 6v on the fiver. If you want you batteries to last, never discharge them more than 50%. Buy a Trimteric or similar battery meter. I ue Trojans they are built for abuse and are trouble free. Yes they cost$$ but lets see $450/10+ years is $45/year. Thats when I sold it. Its my understanding from the owner that they are still going storng.

The rewiring, as noted, at it's most basic is very easy. Hardest part is adequately crimping terminals onto the bigger wire needed, but you can also find pre-made that will work. The rest depends on your rig - space to put them, finding an appropriate box (there are a few different ones - but the space you have may or may not allow them to fit), and figuring out adequate venting for them, may be a bit more of an effort. On my old fifth, it was all very easy. On my TT, a bit more of a challenge. While not the best equipment in the world, the converter your RV came with will charge them just fine. My fifth had an issue with blowing an in line fuse on the charging line if they became too depleted. Head mechanic at the dealer had me replace the fuse with an automatic resetting circuit breaker.

Yup kinda and I hated it.
Had one 12 volt from the factory.
Added two 6 volt GC2 batteries to power my inverter. . They constantly needed water and could not handle the draw from my 2000 watt psw inverter.

Swapped the whole thing to 3 AGM 12 volt deep cycle batteries in parallel and couldn’t be happier. My solar charges them faster also.

hedgehopper wrote:
Have you replaced two 12-volt batteries in parallel with two 6-volt batteries in series to improve ampere hours? Were the results satisfactory? Please elaborate. Was the rewiring difficult?

It works very well, simply connect the two 6v batteries in series to simulate one big 12v battery...A short length of cable between the neg on one battery and the pos on the other will do the trick...

Wire them in series like you said and you shouldn't have any problems. The 6v golf cart batteries are true "deep cycle" batteries and should work much better to power the inside of your RV.