Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
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 01-04-2016, 04:46 PM   #15
brucemcmahon's Avatar
Join Date: Jan 2012
Posts: 32
If you have the room, consider the Trojan T-125's. Same footprint but a little taller. Last longer than the T-105's.

brucemcmahon 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 01-04-2016, 05:06 PM   #16
Senior Member
ChasA's Avatar
Join Date: Mar 2007
Location: Apex, NC
Posts: 1,857
Look into US BATTERY. They make only deep cycle batteries. Usually available from independent distributors who sell to golf courses and marinas and such. They are a major battery manufacturer whose batteries are often relabeled.

2010 Winnebago Journey Express 34Y
2010 Freightliner XCS (mfd 9/'09)
'07 Saturn Vue V6
ChasA is offline   Reply With Quote
Old 01-04-2016, 06:48 PM   #17
Senior Member
DDDonkey's Avatar
National RV Owners Club
Ford Super Duty Owner
Join Date: Dec 2013
Posts: 456
My interstate batteries are going out (one test bad, the other test marginal), I looked around and am going to replace them with Costco CG2 batteries. The T-105 may last a little longer but for the price of $83 each I can't beat that.
2008 National SurfSide 34E (Bunk Model) Ford V10
Sold- 1990 Hawkins Chevy P30 454
DDDonkey is offline   Reply With Quote
Old 01-04-2016, 07:45 PM   #18
Senior Member
Fleetwood Owners Club
Join Date: Sep 2015
Location: Near San Antonio, TX
Posts: 433
I just got 4 vmax power tanks (GC2 size) in fedex today. Those batteries came fully charged and don't drop in voltage at all on a load test.

Unfortunately, the coach is in the shop for at least 2 more weeks, so I won't be able to get them installed any time soon.
2005 Discovery 39s Cat C7 330hp, AF1 brakes,
2013 Silverado Crew Cab Toad, Blue Ox Towbar
montyhp is offline   Reply With Quote
Old 01-05-2016, 08:36 AM   #19
Senior Member
wa8yxm's Avatar
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 23,900
The O/P's question can be easily answered as can many others by remembering THERE ARE NO SIX VOLT BATTEREIES IN RVs.

Yes, I know.

WHat you have is not two six volt batteries. But two halves of a 12 volt battery.. They do it that way cause a 4D 12 volt is HEAVY and expensive, the pair of GC-2 class six volt are half the weight (each) and less expensive.. But when installed they become two halves of a single 12 volt battery.

Think of them as a single 12 volt and many questions are answered.

How do I charge THEM? (You charge IT (the 12 volt battery) same as you do any other 12 volt. At a max current (in this case) 0f about 60 amps.

Can I change just one of them? (O/P's question) Can you change half of a 12 volt battery? (NO)

Can they be different from each other? Would you want a 12 volt battery were one half was different from the other half?... I thought not.

See how questions go POOF when you think of them as a single 12 volt battery?
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 01-05-2016, 11:56 AM   #20
Senior Member
chboone's Avatar

National RV Owners Club
Ford Super Duty Owner
Join Date: Sep 2010
Location: Horse Town USA, CA.
Posts: 3,062
Originally Posted by DDDonkey View Post
My interstate batteries are going out (one test bad, the other test marginal), I looked around and am going to replace them with Costco CG2 batteries. The T-105 may last a little longer but for the price of $83 each I can't beat that.
I agree.
I like Trojans but the Interstates GC2 from Costco for $83 is a good price. I bought 6 of them last years. I take good care of my batteries so hopefully they will last several years. Never have been a big fan of Interstate to many issues with them in my working days maintaining 25 emergency generators and pump drivers.
BTW, Interstates are made by Johnson Controls the world's largest battery manufacturer and the same company that makes Walmart batteries.
1999 35 ft. Dolphin 5350, F53, Banks System, 5 Stars Tune, Air Lift Air Bags, Koni Shocks, Blue OX TruCenter, TigerTrak track bars F&R, Roadmaster 1-3/4" rear auxiliary sway bar, 2004 F450 Lariat 6.0 Diesel Crew Cab DRW, 4X4, B&W Custom Truck Bed, GVWR 15,000, Front GAWR 6,000, Rear GAWR 11,000, GCWR 26,000, 1994 36ft Avion 5er, GVWR 13,700
chboone is offline   Reply With Quote
Old 01-05-2016, 12:32 PM   #21
Senior Member
41pu's Avatar
Ford Super Duty Owner
Holiday Rambler Owners Club
Join Date: Jan 2015
Location: Discovery Bay Ca
Posts: 165

Originally Posted by deandec View Post
We have had T-105 and Costco GCII batteries.

Costco is cheaper. The T-105 might last longer.

The length of life depends on your care and use of the battery during its life.
I had 8 6 volt battery's in a motor yacht over the years. T105 as well as Costco.
With good maintenance care I was able to get 6 years out of them. Costco is a little cheaper and way easier to warranty.
41pu is offline   Reply With Quote
Old 01-07-2016, 10:06 AM   #22
Senior Member
NMRVer's Avatar
Thor Owners Club
Ford Super Duty Owner
Join Date: Jul 2014
Location: Alamogordo, NM
Posts: 281
ALWAYs replace as pair...my motto.

well, unless you just bought a bad one (say less than 6 months)
Ford RV V10 5 star Tow tune
Front/Read Roadmaster 1 3/4" anti-sway bars. Roadmaster steering stabilizer
2009 Acme Tow dolly w/ 2014 Avalon Hybrid Limited
NMRVer is offline   Reply With Quote
Old 01-07-2016, 10:30 AM   #23
Senior Member
B52Guy's Avatar
Holiday Rambler Owners Club
Join Date: May 2011
Location: Texas
Posts: 233
Shop price for Trojans

I replaced mine a year ago...I boiled out my old ones because I had a bad circuit board. Once I fixed it, I replaced my batteries. I upgraded from !05s to 145s...same footprint, but taller and I had the headroom. Two things:

The first five places I shopped all quoted the same price. Finally found a golf cart shop that quoted me $80 or so apiece (way better!). They promised they would be new, and fresh...they were...dated the manufacturing date was the month I bought them. So shop!

Secondly, I bought a watering kit from Amazon. Trojan has a great looking one, but it cost more than two of the batteries! I bought the kit from Amazon and have loved it. I don't have to bump my head and use a flashlight to check levels....It has proven to well worth the money.
'07 Holiday Rambler Endeavor PRQ ("Elvis"), and our 2012 CRV toad
B52Guy is offline   Reply With Quote
Old 01-07-2016, 10:43 AM   #24
Senior Member
Beagle RC Air's Avatar
Join Date: Nov 2001
Location: Raymond, Washington
Posts: 414
Originally Posted by Smitty77 View Post
Agree replace in a pair. If you need more capacity, and have enough headroom, also check the T125 or T145. More capacity, same footprint, if they'll fit and if you want the extra capacity.

And the Crown batteries are getting very positive feedback from many RV'ers and home energy users. Good quality construction, and tight quality controls.

If you are good at keeping the batteries maintained for fluid levels, cleaning posts - then wet is an economical and practical way to go. If you want to install and forget, and your inverter/charger has an AGM setting, you could look into installing a set of AGM's.

Lots of great choices to make, and lots of fellow RV'ers will be willing to help you spend your money the way they think you should!

that's a good one!


Beagle RC Air is offline   Reply With Quote

replacement, battery, replace, ace

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
Winnebago Coach Battery Replacement geneallue Winnebago Industries Owner's Forum 6 06-14-2015 09:51 AM
Unique type of Battery Failure teddyu Class A Motorhome Discussions 10 09-27-2014 09:29 AM
Replacement house battery rcase13 Class C Motorhome Discussions 7 07-22-2014 02:56 PM
The better battery for replacement Sleepy RV Systems & Appliances 14 04-02-2014 06:35 PM
Battery Advice sjkted Class A Motorhome Discussions 33 02-06-2014 08:12 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:01 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.