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6v or 12v?

Freep
Explorer
Explorer
All else being equal, which is preferable and why?

2 220 AH 6v batteries
or
2 110 AH 12v batteries
2014 Lance 992
2014 Ram 3500 DRW Turbo diesel
66 REPLIES 66

Freep
Explorer
Explorer
time2roll wrote:
Alright!

Honestly I would try to just not use the 12v fridge option. Use propane on the road like 99 percent of RVs do.

12v vs 6v points are moot once you move to AGM. I recommend Lifeline deep cycle in the shape that fits the most amp/hrs in the space. No difference in construction, very low fail rate.

Next would be to review your charging system to minimize generator run time. Solar is great however if running the generator you want 60+ amps at 14.4 volts into the Lifeline. Flooded you want 14.8 volts again at 60+ amps. Other AGM is good too but check the charging specs.

PD9280C - 14.4 volts

PD 9280C - 14.8 volts


After the trouble and expense I went through to get the right gauge harness installed, I'm using the DC fridge while driving. ๐Ÿ™‚ I just have to remember to make sure I'm back on LP when I stop.

I had already settled on the lifelines and found several candidates that will squeeze the most battery into the space.

I'm glad you mentioned the converter chargers. This is one area where I am ignorant. I don't how the battery is charged now when the gen is running or when I'm plugged in. I do remember seeing some device in the basement wired between the gen and something. I'll have to check that out.
2014 Lance 992
2014 Ram 3500 DRW Turbo diesel

time2roll
Nomad
Nomad
Alright!

Honestly I would try to just not use the 12v fridge option. Use propane on the road like 99 percent of RVs do.

12v vs 6v points are mute once you move to AGM. I recommend Lifeline deep cycle in the shape that fits the most amp/hrs in the space. No difference in construction, very low fail rate.

Next would be to review your charging system to minimize generator run time. Solar is great however if running the generator you want 60+ amps at 14.4 volts into the Lifeline. Flooded you want 14.8 volts again at 60+ amps. Other AGM is good too but check the charging specs.

PD9280C - 14.4 volts

PD 9280C - 14.8 volts

Freep
Explorer
Explorer
time2roll wrote:
Read through them all? How about post your concerns related to your camping style.
Space concerns, how will you charge them... throw us a bone for what you need.

Otherwise you have read all the general answers.... go down and buy something. Unless you are going lithium not much has changed in 25+ years.


No, I did not read them all but I read a lot of them over the last few months.

OK, Here's some details. We mostly boondock and generally stay for one or two days in each location. I hate using the Onan generator because it is incredibly loud. I recently added the lance 8 gauge harness to the truck so the camper batteries will charge and I can run the fridge on DC when driving. This works very well. We also have a 90 W solar panel. I will probably add a 200 W panel and an MPPT charge controller after upgrading the batteries.

On our last trip during the eclipse, our batteries drained considerably most nights. One reason was the fridge not flipping to LP after camp was set up and me not noticing it for about an hour(twice!). But we also use our computers quite a bit and listen to the radio. We don't watch TV much, no satellite. We like to camp in the colder months and need the heater to run during the night. The batteries are AC Delco G24 FLA batteries, 12 V.

My wife routinely takes the camper out on her own and I don't want her losing power in the fall and winter, so I'm looking at AGMs, even though I really want to go Lithium.

Let me know if you want any more details.
2014 Lance 992
2014 Ram 3500 DRW Turbo diesel

azrving
Explorer
Explorer
You cant compare a 12 v gp dual purpose battery to a gc2. As covered in the last go around compare a Trojan SCS225 to two T105

GordonThree
Explorer
Explorer
Freep wrote:
pianotuna wrote:
It depends.

My own preference is 12 volt. I do that because I run a medium size 3000 watt inverter.


This is interesting. How does the inverter figure into this? At some point I'd like to add an inverter too. The hope is to one day be able to run the MW for a few minutes without running the gen.


Some physics thing. The 12v carry a heavy load with less drop. I forget the name of the effect.

Now this means a true 12v deep cycle, not a starting battery rated by CCA.
2013 KZ Sportsmen Classic 200, 20 ft TT
2020 RAM 1500, 5.7 4x4, 8 speed

time2roll
Nomad
Nomad
Freep wrote:
Yeah, I read through most of those before I posted. That's why I tried to simplify the question the way I did.
Read through them all? How about post your concerns related to your camping style.
Space concerns, how will you charge them... throw us a bone for what you need.

Otherwise you have read all the general answers.... go down and buy something. Unless you are going lithium not much has changed in 25+ years.

Freep
Explorer
Explorer
2oldman wrote:
6v v 12 2017
12v vs 6v.. which charge faster? 2014
12v or 6 Dec 2013
2- 12v or 6v June 2013
12v vs 6v batteries 2013
12v vs 6v batteries 2006
More 12v vs 6 2006
12v vs 6v 2010
Why 2 6? 2006

Anybody had one 6v fail?2010

maybe 12v is better 2010
12v vs 6v Feb 2010


Yeah, I read through most of those before I posted. That's why I tried to simplify the question the way I did.
2014 Lance 992
2014 Ram 3500 DRW Turbo diesel

Freep
Explorer
Explorer
pianotuna wrote:
It depends.

My own preference is 12 volt. I do that because I run a medium size 3000 watt inverter.


This is interesting. How does the inverter figure into this? At some point I'd like to add an inverter too. The hope is to one day be able to run the MW for a few minutes without running the gen.
2014 Lance 992
2014 Ram 3500 DRW Turbo diesel

Freep
Explorer
Explorer
cewillis wrote:
I'd rather have (and do have) multiple 12v. If one is no good, you're still in business.


If you have a 6v to 12v step up converter in the emergency kit, then you can still work with a single 6v. That's about 30 bucks.

So again, that puts me pretty much even on the two choices.
2014 Lance 992
2014 Ram 3500 DRW Turbo diesel

pianotuna
Nomad III
Nomad III
It depends.

My own preference is 12 volt. I do that because I run a medium size 3000 watt inverter.
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

GeoBoy
Explorer
Explorer
6V Lifelines AGM's.

GordonThree
Explorer
Explorer
cewillis wrote:
I'd rather have (and do have) multiple 12v. If one is no good, you're still in business. And with the specs you mentioned, it's 220AH at 12v either way.


X2 for 12v
2013 KZ Sportsmen Classic 200, 20 ft TT
2020 RAM 1500, 5.7 4x4, 8 speed

Freep
Explorer
Explorer
NRALIFR wrote:
I'd base my choice of batteries strictly on which one would allow me to stuff more AH's in the available space. There are more sizes of 12v batteries than just the group 27's you are comparing to. If you can fit 2 group 31's of the correct type, you could have more available AH's than the 2x6v.

:):)


Actually, you can find 6v in quite a few sizes. I built a little spreadsheet to help me narrow down the batteries I can fit in the battery box and I keep hitting upon the same choice, which is 2 12v or 2 6v with the same number of amp hours.

I also save a few bucks with the 6v, but not much.

Also, I'm looking at AGM, but that shouldn't factor into the 6 versus 12 question.
2014 Lance 992
2014 Ram 3500 DRW Turbo diesel