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Open Roads Forum  >  Tech Issues

 > which way is best 2 6V or 2 12V batteries

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TCINTN

USA

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Posted: 06/24/13 07:26am Link  |  Quote  |  Print  |  Notify Moderator

Have a new to me an 811 Northern Lite.
Need to upgrade battery.
Which way is best for most lasting power?
Have room for either situation.

2 6V or 2 12V looking at group 30 110 AH
Thanks
Ed


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Reddog1

El Dorado, CA

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Posted: 06/24/13 08:39am Link  |  Quote  |  Print  |  Notify Moderator

Moved to the Tech Issues Forum.

Wayne
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Sandia Man

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Posted: 06/24/13 08:41am Link  |  Quote  |  Print  |  Notify Moderator

Either combination will work as it's about total amphours in the long run. 6 volt golfcart batteries do tend to withstand lower discharging levels better than their 12 volt counterparts, but I've run both types and have had good success with either set-up. I currently have a pair of Interstate 6 volt GC2 batteries I purchased from Samsclub 3 years back that are holding up well.

hershey

Albuquerque,(fulltime) NM, USA

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Posted: 06/24/13 08:42am Link  |  Quote  |  Print  |  Notify Moderator

You'll get plenty of input on your query.
I've had both.
I now have 4 - 6 volt batteries rather than 2 - 12 volt batteries.
The 4 6 volt batteries out perform the 2 12 volt batteries by about 25%. I'll never go back to 12 volt batteries.
Ever wonder why golf carts use 6 or 8 volt batteries and not 12 volt????

* This post was edited 06/24/13 06:42pm by hershey *


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Matt_Colie

Southeast Michigan

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Posted: 06/24/13 08:57am Link  |  Quote  |  Print  |  Notify Moderator

Ed,

Believe Hershey.

I do boat electrics. Most are serious cruisers. If they can't handle 4D or 8D (Gunga Mama batteries) then I set them up with T-105, T-120s or GC2 in series.

If you put 12Vs in parallel you will be hard pressed to get both to charge to full density - ever. Then there is the interesting issue when they get old and one cell goes bad. It can use the full power of the other to boil the acid or explode the battery.

Just my take and 50+years of experience.

Matt


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A sailor, his bride and their black dogs going to see some dry places that have Geocaches in a coach made the year we married.


2oldman

NM

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Posted: 06/24/13 08:58am Link  |  Quote  |  Print  |  Notify Moderator

12v vs 6v batteries 2013
12v vs 6v batteries 2006
More 12v vs 6 2006
12v vs 6v 2010
Why 2 6? 2006

cewillis

Tucson, az, usa

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Posted: 06/24/13 02:44pm Link  |  Quote  |  Print  |  Notify Moderator

Neither is intrinsically better. I suggest AGM batteries, and go with highest AH/lb or AH/$.
Assume you know that for 12v output AHs do not add for 6v (series connection), and do add for 12v (parallel connection).


Cal


time2roll

Southern California

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Posted: 06/24/13 02:46pm Link  |  Quote  |  Print  |  Notify Moderator

About the same unless you have some specific concerns.

TheBearAK

Alaska

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Posted: 06/24/13 03:37pm Link  |  Quote  |  Print  |  Notify Moderator

Matt_Colie wrote:

Then there is the interesting issue when they get old and one cell goes bad. It can use the full power of the other to boil the acid or explode the battery.
Matt


6 Volt batteries can do this to if you have 4 of them, 2 x 2, series x parallel.

Golf Cart batteries typically have thicker plates and do not heat up to warp the plates. You can get 12 Volt batteries with the same type of plates.

And the idea of one lasting longer than the other is absurd. It comes down to design of the plates and heat dissipation. Typically a 12 V battery that has the same design as a "golf cart" battery cost 2x as much per battery.

wa8yxm

Davison Michigan (East of Flint)

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Posted: 06/24/13 05:41pm Link  |  Quote  |  Print  |  Notify Moderator

Let me ask you a question: Which religion is best (Please do not answer this question)

This is the question you have asked. There are folks here who will say "Oh Only 12 volt, Only 12 volt" and there are folks who will say "only 6 volt pairs, only six volt pairs".

The facts are basically, So long as you compare DEEP CYCLE to DEEP CYCLE there is not a lot of difference till you get to one line on the spec sheet, I'll come to that in a bit.

The thing, however, is Marine/Deep cycle.. is NOT DEEP CYCLE, it is automotive starting. the common GC-2 golf car battery IS deep cycle.

Now, that said, you can not get 12 volt golf car batteries, and I've long had access to other genuine 12 volt Deep Cycle batteries.

My recommendation is thus: Stick with a true DEEP CYCLE (Trolling or golf car) not a "marine/Deep cycle"

Now, the one spec that is often different by a big time

Cost: $80.00 (six volt at Sam's club, you need two for 230 amp hours of DEEP CYCLE power (115 usable).

Try that with the others.


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2005 Damon Intruder 377 Alas declared a total loss
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