Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 02-27-2015, 01:28 PM   #1
vol445's Avatar
Join Date: Dec 2014
Posts: 77
6v or 12 v

Guys I have to say I have been reading this and I'm really surprised. I double checked myself with the CEO of a major battery company. If you use a 12 V battery that has 100 AH and you connect it in a series with another like battery, you get 24 V and 100 AH. If you connect it in parallel, you get 12 V and 200 AH. You can raise one but not both. If a 6 V battery has less AH than a 12 V battery it will never beat the 12 V. As far as the plates are concerned, there is no proof that one is better than the other.

vol445 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 02-27-2015, 01:33 PM   #2
Senior Member
Dr4Film's Avatar

Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 7,542
This controversial topic has been hashed around on this forum 'til the cows come home.

I would suggest doing a thorough search on this forum and you will have plenty to read plus some threads will have a variety of Internet resource links that will give you excellent information regarding battery types and differences.

Not one size fits all and there are many Apples and Oranges out there.

Dr4Film ----- Richard

2002 Monaco Windsor PBT 40Ft. (R HOME) - 30Ft. 2006 Pace Trailer (R JUNK). Trailer Has 06 VUE (R TOWD) 04 Victory Alen Ness Edition (R RYDE). Full-Timer for 14 Yr's BUT now a Part-Timer. Cummins ISC-350 With Banks Power Pack and Upgraded PRXB PacBrake.
Winter Home in Flagler Beach FL - Now Staying in Dansville NY for the Summer.
Dr4Film is offline   Reply With Quote
Old 02-27-2015, 01:42 PM   #3
Senior Member

Join Date: Aug 2011
Posts: 2,588
6v or 12 v

The reason 6 volt batteries are popular is mainly because they are used in golf carts by the tens of thousands, and are built to be durable and take abuse.

The huge quantity they are produced in makes them cheaper than a 12 volt battery of equivalent construction and capacity.

The 12 volt batteries used in cars don't cut it, because they are designed the opposite of a deep cycle battery. Cars draw maximum starting amps for just a few seconds, and then are immediately recharged by the on-board alternator.

So it's economics rather than physics or chemistry which is dictating that two 6 volt golf cart batteries is better than two 12 volt batteries.

You CAN purchase quality, durable deep cycle 12 volt batteries, but they are harder to find and quite expensive due to not many people buying them.


Here are the economics...

GC2 6 volt battery from Sams Club. $90 220Ah 2 of these = $180 220Ah

27TMH Trojan 12 volt battery (deep cycle) $180 115Ah. 2 of these = $360 230Ah

pasdad1 is offline   Reply With Quote
Old 02-27-2015, 02:12 PM   #4
Senior Member
Join Date: Jul 2014
Posts: 5,481
The point is, at about the same size, 6 volt batteries have about double, if not more AH. And like others have said, it is built for deep cycling.

Good day
twinboat is offline   Reply With Quote
Old 02-27-2015, 02:18 PM   #5
Senior Member
Ray,IN's Avatar
Join Date: Aug 2001
Location: North America somewhere
Posts: 12,300
I agree, mostly a personal preference. If I chose to switch from my present 12V battery bank, which is three 200AH, 12v batteries; I would probably select these LifeLine 6V, 400AH RV deep cycle batteries.
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"
Ray,IN is offline   Reply With Quote
Old 02-27-2015, 02:33 PM   #6
Senior Member
jplante4's Avatar
Monaco Owners Club
Nor'easters Club
Join Date: Sep 2013
Location: Cape Cod Mass
Posts: 316
You also have to have room in the battery tray for enough 6V batteries to take the place of the AH in your 12V batteries you have now. Also, the same amp hours in 6V batteries would most likely weigh more than the 12Vs so you need to make sure you have the cargo carrying capacity.
Jerry & Jeanne
1996 Safari Sahara 35' - White Tiger
Cape Cod
jplante4 is offline   Reply With Quote
Old 02-27-2015, 03:15 PM   #7
Senior Member
Join Date: Jul 2014
Posts: 5,481
Yes if you have 1, 12 volt battery, your stuck with it.

If you have 2, then you can use either type, as long as you have a few inchs in height. They are a little taller.

The weight issue is 20 or 30 lb`s each, but that means more lead, more power.

Just like engines, there is no replacement for displacement.

twinboat is offline   Reply With Quote
Old 02-27-2015, 04:16 PM   #8
Senior Member
Superslif's Avatar
Thor Owners Club
Pond Piggies Club
Join Date: Jun 2000
Location: NE. Ohio USA
Posts: 3,808
Here is a good video about the two 6 volt vs. a 12 volt. Best battery for dry camping
Jim, Diane & Robert ~ NE. OH.
2013 Aerolite Hybrid #232 ES
2014 Toyota Tundra Limited 5.7L
IRV2 Photo Album ~Let's Go Places~
Superslif is offline   Reply With Quote
Old 02-28-2015, 04:55 AM   #9
Senior Member
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 21,174
ALL batteries in motor homes and trailers are 12 volt (Exception a few use 24 volt chassis batteries).

Some are built in one piece

Some in two pieces (A pair of GC-2 Golf Car batteries in series is an example of a 2 piece battery, 6V plus 6V (in series) = 12 volt at over 200 amp hours)

Some are in two pieces but parallel (a group pair of group 29's in parallel is also about 200 amp hours,, NOTE use of the word OVER in the six volt eample)

The major diference is Deep Cycle (GC-2) V/s MARINE/deep cycle (Group XX or the most part) which are more senistive to deep discharge.

I like the GC-2 because:
1: Low cost (most popular lead acid battery leads to lower unit cost)
2: 230 amp hours (the sub category I have)
3: I can wrangle them (a 4D (12 volt at 230 amp horus) is more than I can Wrangle)
4: Deep Cycle.. If I accidently run 'em way down this type of battery has the best chance of recovery.
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 02-28-2015, 05:56 AM   #10
Senior Member
Join Date: Jul 2014
Posts: 5,481
To keep things clear.

Battery, A container consisting of 1 or more cells.

Battery bank, The result of joining 2 or more batteries together.

twinboat is offline   Reply With Quote
Old 02-28-2015, 06:19 AM   #11
Registered User
Join Date: Feb 2015
Posts: 48
Thanks for the excellent link Superslif.
LeeSusan is offline   Reply With Quote
Old 02-28-2015, 06:58 AM   #12
Senior Member
Join Date: Apr 2013
Posts: 355
Also consider a situation where one battery fails: two 6v = failure, two 12v = 50% output.
2003 Itasca Sunrise 32v F53
Okiedoke is offline   Reply With Quote
Old 02-28-2015, 09:35 AM   #13
Moderator Emeritus
Gary RVRoamer's Avatar

Fleetwood Owners Club
Freightliner Owners Club
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 16,420
A couple of years ago I wrote this article on "Choosing the Best RV Battery". It explains the difference in battery types and the pros and cons of using them in an RV.

Gary Brinck
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL
Gary RVRoamer is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:15 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.