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.
Reply
  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 11-28-2014, 09:29 PM   #1
Junior Member
 
Join Date: Nov 2014
Posts: 6
Angry Wrong Batteries

I recently purchased a 2005 Itasca Sunrise 38.
Due to a power outage, I discovered the previous owner had replaced the 12 volt house batteries with 24 volt batteries (Big Mistake!).
Of course, I will need to replace them with the proper batteries.
My question is: They currently are at 6 volts. Are they trashed, or can they be brought up to their original charge?
They are about 5 years old.
Any thoughts?

Glen
__________________

G Longstreet 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 11-28-2014, 09:40 PM   #2
Senior Member
 
Mr_D's Avatar
 
Country Coach Owners Club
Winnebago Owners Club
Solo Rvers Club
iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 32,810
How has anything worked with the 24 volt batteries? Any 12 volt circuit would blow the fuses or the appliance itself as would all bulbs.
Are you sure they aren't 6 volt (which they should be)?
__________________

__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '14 CR-V
Mr_D is offline   Reply With Quote
Old 11-28-2014, 09:56 PM   #3
Senior Member
 
sknight's Avatar
 
Appalachian Campers
Join Date: May 2009
Posts: 908
Unless there was serious conversion done (Every 12V appliance, light bulb brought up to 24V standards, couldn't be healthy for the converter not to mention the chassis electrical) I can't see where it would have 24V batteries.
__________________
2001 HO Cummins powered Dodge 2500
2014 Sierra 346RETS
Nights camped in 2014-28
sknight is offline   Reply With Quote
Old 11-29-2014, 12:21 AM   #4
Community Administrator
 
Scarab0088's Avatar


 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2012
Location: SoCal
Posts: 16,576
Reading between the lines...maybe the OP's house batteries are 2-12Volt cells vs. 2-6Volt, making it possible to have 24Volts? But with only 6Volts from each cell it is not working...

I would then guess that it is actually 2-12Volt cells in Parellel vs. Series - because if it was actually 2-12Volt cells in Series, every DC circuit would be toast.

The reality is that lead-acid batteries that are allowed to discharge more than 50% will be difficult to return to full capability so, I would replace the 12Volt cells with new deep cycle 6Volt cells and carefully wire the new set in series as it probably was from the mfgt. RV's most often use 2-6Volt deep cycle batteries for the good cycle life and useability. They are also not too expensive.

Best luck
__________________
Kim and Steve, Mustang LCDR (USCG Ret), Outlaw #1193
"I have seen gross intolerance shown in support of tolerance", S.Coleridge 1797
https://www.irv2.com/attachments/signaturepics/sigpic84535_7.gif
WE LOVE OUR OUTLAW RV
Scarab0088 is offline   Reply With Quote
Old 11-29-2014, 01:58 AM   #5
Senior Member
 
Join Date: Sep 2012
Posts: 7,502
You can bring the batteries back up. You have lost some life but it beats tossing them without trying. I would do it by using a big light bulb in series with the battery charger to slowly bring up the cells. Once the chemistry is re established then take out the bulb.

You really need to figure out what you are doing with the battery pack in the unit. If it has been converted to 24 VDC you will need to do a full conversion back to the 12 V system or figure out why it works as it is and stay with it. If you do not understand electric power I would suggest you get somebody who is to figure out your system. You want somebody versed in DC power systems.

FWIW - I have not seen one but have seen some comments on using 24 VDC. It does have some advantages but it takes a lot of rework that should be fairly obvious to somebody who knows what to look for.
nothermark is offline   Reply With Quote
Old 11-29-2014, 04:05 AM   #6
Senior Member
 
Chuck48's Avatar
 
Join Date: Mar 2012
Posts: 136
Glen,

The only thing that makes sense would be the battery bank is feeding a 24 volt inverter. As mentioned in previous posts 24 volts will not work on a 12 volt system, especially for 5 years. A picture of the battery bank would help. Count the number of cells in each battery, 3 = 6 volts, 6 = 12 volts. If you have two 12 volt batteries wired in a series and it directly feeds an inverter, that makes sense if is a 24 volt inverter. Not sure you can even buy a 24 volt battery in an auto parts store or a discount big box store. I'm sure they are available somewhere. Seriously doubt you have a 24 volt system to power lights, water pump, and other low voltage in your coach.
Chuck48 is offline   Reply With Quote
Old 11-29-2014, 02:06 PM   #7
Junior Member
 
Join Date: Nov 2014
Posts: 6
wrong batteries

Hi,
I do know lots about batteries, perhaps not about battery labels.
There were two batteries, in parallel, not in series.
I have attached a photo of the battery label.
Am I wrong in thinking that just because it says 24dc it does not mean that?
Perhaps they are really 6 vdc batteries and someone installed them in parallel by mistake, thinking they were 12 vdc.
I do not think the previous owner had used the vehicle for some time, perhaps years.
At any rate, I have them both out and have installed one 12 vdc deep cell battery in its place, so if the power goes out again I am not left sitting in the dark. The two batteries I took out read 6 volts and 5 volts respectively.
Click image for larger version

Name:	battery.jpg
Views:	73
Size:	308.7 KB
ID:	80212
G Longstreet is offline   Reply With Quote
Old 11-29-2014, 02:18 PM   #8
Senior Member
 
87Rockwood's Avatar
 
Vintage RV Owners Club
Join Date: Apr 2012
Location: Looking here and there.
Posts: 742
Those are 12 volt batteries, not 24. Check out online the napa number (8240) on your label.
87Rockwood is offline   Reply With Quote
Old 11-29-2014, 03:42 PM   #9
Senior Member
 
Alan_Hepburn's Avatar
 
Fleetwood Owners Club
Workhorse Chassis Owner
Join Date: Feb 2000
Location: San Jose, Ca, USA
Posts: 1,170
Yup - 12V batteries: Group 24. If they are reading 6V then they are dead - not sleeping, not pining for the fjords....
__________________
Alan Hepburn - San Jose, Ca
2007 Bounder 35E being pushed by a 2008 smart fortwo Passion
Good Sam Member #566004 * FMCA Member #F431612
Alan_Hepburn is offline   Reply With Quote
Old 11-29-2014, 04:13 PM   #10
Community Administrator
 
Scarab0088's Avatar


 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2012
Location: SoCal
Posts: 16,576
Great job posting the photo of the NAPA number

The new single 12Volt cell will get you through for any emergency...just won't last too long under a load.

Best luck and safe travels
__________________
Kim and Steve, Mustang LCDR (USCG Ret), Outlaw #1193
"I have seen gross intolerance shown in support of tolerance", S.Coleridge 1797
https://www.irv2.com/attachments/signaturepics/sigpic84535_7.gif
WE LOVE OUR OUTLAW RV
Scarab0088 is offline   Reply With Quote
Old 11-29-2014, 04:42 PM   #11
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,022
I see now how the O/P got confused, The battery clearly says 24DC, which he assumed was the voltage, it is in fact the battery size group, Group 24, 75 amp hours at 12 volts,

Yes, since they are toast (At that voltage dual purpose or MARINE/DEEP cycle are gone to battery heaven or rather need to be sent to the rebuilders) but if there is sufficent headroom a GC2 pair will fit where two of those fit, You wire them differently (Series) but the two six volt GC-2 depending on the precise sub category are from 220 amp hours to 250 amp hours, My DEKA G-20's are 230 amp hours. WARNING they are HEAVY batteries, and they are a bit taller.

But they work good and .. True DEEP CYCLE, if you get to them quickly, can recover from that deep a discharge, Mine old interstates did, more than once. (My DEKAs have not,,, yet)
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 11-29-2014, 04:50 PM   #12
RVM #74
 
PushedAround's Avatar


 
Tiffin Owners Club
Join Date: Sep 2012
Location: Ambler, PA
Posts: 2,853
Blog Entries: 7
Quote:
Originally Posted by Alan_Hepburn View Post
Yup - 12V batteries: Group 24. If they are reading 6V then they are dead - not sleeping, not pining for the fjords....
He's not dead, he's just restin.....

BTW wa8yxm has good advice here.
__________________
Larry & Cheryl Oscar, Louie, Ranger & Henry (our Springers)
PushedAround is offline   Reply With Quote
Old 11-30-2014, 03:23 AM   #13
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,022
Thanks Push... I do lots of research (Enjoy it) but it's nice to read what you posted.

How to answer all your six volt v/s 12 volt battery questions

Two Six volt GC-2 batteries in series = 1 12 volt battery size 4D
Treat them, think of them, work with them EXACTLY as though they were a 4D,, Only exceptions are: You clean twice as many connections and you do NOT get a hernia when you remove them one right after the other for replacement. (half the weight at a time). Do replace them both at the same job though (one right after the other) just like flashlight batteries, Take them both out, then put 2 new in.
__________________

__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Reply

Tags
batteries



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
Charging House Batteries jtermini30 MH-General Discussions & Problems 7 11-17-2016 08:08 AM
Bounder: Adding batteries to 2014 Bounder, where? Bruadair Fleetwood Products Owner's Forum 8 05-17-2015 05:22 AM
Maybe Bad Batteries - Getting Them Tested Sky_Boss RV Systems & Appliances 1 09-05-2014 03:39 PM
House Batteries cooked on us! RV1597 RV Systems & Appliances 13 07-05-2014 01:26 PM
House batteries making buzzing noise Furniss Class A Motorhome Discussions 10 06-21-2014 10:46 AM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:22 PM.


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