RV.Net Open Roads Forum: Tech Issues: Replacing 12-volt batteries with 6-volt

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > Replacing 12-volt batteries with 6-volt

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next
Sponsored By:
ksg5000

Oregon

Senior Member

Joined: 06/30/2008

View Profile



Posted: 11/04/19 09:08am Link  |  Quote  |  Print  |  Notify Moderator

Also - make sure you have room for the sixers - they are taller than the 12's and in my rig they won't fit.


Kevin

bob213

Fresno, CA

Senior Member

Joined: 12/09/2007

View Profile



Good Sam RV Club Member

Offline
Posted: 11/04/19 10:05am Link  |  Quote  |  Print  |  Notify Moderator

Check here forhow to wire them.
12 volt side of life


You can avoid reality, but you cannot avoid the consequences of avoiding reality – Ayn Rand


ktmrfs

Portland, Oregon

Senior Member

Joined: 06/22/2005

View Profile


Offline
Posted: 11/04/19 10:23am Link  |  Quote  |  Print  |  Notify Moderator

6V advantage
1) can take 500+ charge discharge cycles to under 50% (more like 25%) SOC

Disadvantage:
do NOT work well with high current loads, like even 1000W inverter. First ALL the current is coming from each battery vs 1/2 the current from each battery in a similar parallel 12V, Next, they have much higher internal resistance than a 12V which means more voltage drop

6V vs 12V IMHO really depends on YOUR application. If you only occasionally dry camp, or often use high inverter loads, then 12V may be a better alternative.

If you often dry camp, can keep your load down to 50A or less peak, 6V may be a better choice.


2011 Keystone Outback 295RE
2004 14' bikehauler with full living quarters
2015.5 Denali 4x4 CC/SB Duramax/Allison
2004.5 Silverado 4x4 CC/SB Duramax/Allison passed on to our Son!


time2roll

Southern California

Senior Member

Joined: 03/21/2005

View Profile



Good Sam RV Club Member


Posted: 11/04/19 10:25am Link  |  Quote  |  Print  |  Notify Moderator

I went with 4x GC2. Wire is easy.
Click on my solar set up for a battery picture.


2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
675w Solar pictures back up

3 tons

CA.

Senior Member

Joined: 03/13/2009

View Profile


Offline
Posted: 11/04/19 11:35am Link  |  Quote  |  Print  |  Notify Moderator

ktmrfs wrote:

6V advantage
1) can take 500+ charge discharge cycles to under 50% (more like 25%) SOC

Disadvantage:
do NOT work well with high current loads, like even 1000W inverter. First ALL the current is coming from each battery vs 1/2 the current from each battery in a similar parallel 12V, Next, they have much higher internal resistance than a 12V which means more voltage drop

6V vs 12V IMHO really depends on YOUR application. If you only occasionally dry camp, or often use high inverter loads, then 12V may be a better alternative.
.


Note that I have for a out 6 years routinely run my Coleman Mach 1 P.S. 11kbtu air conditioner for brief periods (up to an hour or more concurrent with 440w solar) from two 6v GC’s without a hitch (via ProSine 2.0 - 04 aught cables), with locked rotor starting amps at about 140amps - now running Costco GC’s...Cables do MATTER...

TomG2

Central Illinois

Senior Member

Joined: 03/07/2004

View Profile



Posted: 11/04/19 01:07pm Link  |  Quote  |  Print  |  Notify Moderator

marcsbigfoot20b27 wrote:


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.


That is a not often mentioned advantage of sticking with 12 volt batteries. One, two, three, four, or five all increase available power without having to buy in pairs.

2oldman

Ca

Senior Member

Joined: 04/15/2001

View Profile


Offline
Posted: 11/04/19 02:03pm Link  |  Quote  |  Print  |  Notify Moderator

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. .
Maybe you should have removed the 12v.

2 -6v batteries are not enough for any big draw inverters. 4 minimum, 6 is better, but incredibly heavy.

bpounds

Sophmore Brain...

Senior Member

Joined: 12/12/2010

View Profile



Good Sam RV Club Member

Offline
Posted: 11/04/19 04:09pm Link  |  Quote  |  Print  |  Notify Moderator

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?


Just do it. You'll be happy you did.


2006 F250 Diesel
2011 Keystone Cougar 278RKSWE Fiver


wa8yxm

Wherever I happen to park

Senior Member

Joined: 07/04/2006

View Profile


Offline
Posted: 11/04/19 04:20pm Link  |  Quote  |  Print  |  Notify Moderator

SO that you know. with large inverters Xantrex suggests at leat one pair GC-2 per kilowatt of inverter.. Now when my GC-2s were new one pair would cook my lunch in the 1100 watt microwave with the 2KW inverter but they suggest one pair per KW.

And when you do the "how much power" math. for inverters assume 10 volts from the battery.. not dead on but by the time you factor in conversion loss (About 10 percent) and line loss.. Darn close.


Home is where I park it.
Kenwood TS-2000 housed in a 2005 Damon Intruder 377


philh

Belleville MI

Senior Member

Joined: 05/11/2015

View Profile


Offline
Posted: 11/04/19 06:41pm Link  |  Quote  |  Print  |  Notify Moderator

You must change out the convertor charger and get rid of the POS WFCO. I love my 2 6v batteries. Haven't run anything heavy, but they have performed well for me.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next

Open Roads Forum  >  Tech Issues

 > Replacing 12-volt batteries with 6-volt
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:

© 2019 CWI, Inc. © 2019 Good Sam Enterprises, LLC. All Rights Reserved. | Terms of Use | PRIVACY POLICY | YOUR PRIVACY RIGHTS