Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > RV SYSTEMS AND TECHNOLOGIES FORUMS > RV Systems & Appliances
Click Here to Login
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 12-09-2022, 08:08 PM   #1
Junior Member
Join Date: Nov 2022
Posts: 2
Coach Battery Configuration Best Options

I currently have 2 Duracell ECC2 6 volts 75 Amp at 120 minutes wired in series for 12 volt system. I think one has failed and may need to replace one of the two. Thinking of upgrading to AGM for the maintenance free and aware of cost difference aspect. I am wondering if I can just buy a more expensive single 12 volt AGM battery to replace the two 6 volts. Is there any advantage/disadvantages to keeping two 6 volts in series if my battery compartment will hold the larger single12 volt battery unit.
Dave121 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! 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 12-09-2022, 11:20 PM   #2
Senior Member
Duster73's Avatar
Join Date: Mar 2021
Posts: 410
The main advantage for two 6 volt batteries wired, is longer reserve capacity. If your not boon docking then a single 12V battery will be fine for you.

It will not hurt the system in any way to convert to a single 12V battery.
"A Man's Gotta Do What a man's Gotta Do"
2000 Fleetwood Southwind Storm 30H- Workhorse
2016 Prime Time Tracer 3150BHD
Duster73 is offline   Reply With Quote
Old 12-10-2022, 05:37 AM   #3
Senior Member
Argosy's Avatar
Join Date: May 2004
Location: MI
Posts: 1,607
There are plenty of 12v batteries that have higher storage capacity than 2 6v GC batteries wired in series.

What's hard to find is 12v batteries that can approach the price of the GC batteries.
Argosy is offline   Reply With Quote
Old 12-10-2022, 08:07 AM   #4
Senior Member
Join Date: Jul 2014
Posts: 32,185
First, unless you physically damaged the battery and it's less then a year old, you need to replace both. They wear like front tires, always in pairs.

Yes you can replace with one AGM 12 volt battery but you will have about 1/2 the capacity of the pair of 6 volt batteries. Thats fine if you don't dry camp and only use battery for lunch and dinner breaks.

An AGM battery with the same capacity as your pair of 6 volt battery will be a 4D or 8D group size, 2 to 3 times the size of a 6 volt GC2 group battery. You can buy 2 12 volt AGM batteries and wire them in parallel.

Most off the shelf 12 volt deep cycle batteries are hybrids that do starting and deep cycling, just not the best at each job.

A GC2 6 volt battery is built for electric golf carts, made to be discharged to just about dead by uncaring golfers and then recharged over and over again. Very popular and inexpensive because golf carts use 8 of them.

Don't mix up RC and AH, they are not the same.
The more RC or AH capacity, the longer it will power stuff before recharging.

Take all of the above into consideration before buying new batteries.
twinboat 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Coach Battery Configuration Spitfire63 National RV Owner's Forum 11 09-24-2020 10:26 AM
Options, Options and More Options!! ianschneider Newmar Owner's Forum 7 10-17-2016 06:07 AM
AGM Battery Users. Update Your Configuration Lug_Nut Newmar Owner's Forum 5 08-21-2010 03:48 AM
battery/external power configuration? padraig1066 Winnebago Industries Owner's Forum 2 08-20-2009 11:13 AM
House battery configuration? Davestoy Monaco Owner's Forum 4 03-14-2009 10:29 AM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 03:56 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.