Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
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 03-04-2008, 02:52 PM   #1
Senior Member
 
YosemiteBobR's Avatar
 
Thor Owners Club
Ford Super Duty Owner
Join Date: Apr 2005
Location: So Cal
Posts: 788
OK, so I've done a search and have not found what I was looking for. I check my batteries regularly (coach is on my property) and noted while adding distilled water today (check every month) that the two outside cells in one of the four batteries was considerably low while the center cell was right up to the top. I mean below the top of the plates where it should not be. Is this an indication that the battery could be going bad? Or is it just an unusual occurrence.
__________________

__________________
2015 Four Winds Super C 33SW, w 6.7 Diesel 300HP - 660 lbs of torque
2011 Jeep Wrangler Sport as towed vehicle
Good Sam Club Life Member
YosemiteBobR 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 03-04-2008, 02:52 PM   #2
Senior Member
 
YosemiteBobR's Avatar
 
Thor Owners Club
Ford Super Duty Owner
Join Date: Apr 2005
Location: So Cal
Posts: 788
OK, so I've done a search and have not found what I was looking for. I check my batteries regularly (coach is on my property) and noted while adding distilled water today (check every month) that the two outside cells in one of the four batteries was considerably low while the center cell was right up to the top. I mean below the top of the plates where it should not be. Is this an indication that the battery could be going bad? Or is it just an unusual occurrence.
__________________

__________________
2015 Four Winds Super C 33SW, w 6.7 Diesel 300HP - 660 lbs of torque
2011 Jeep Wrangler Sport as towed vehicle
Good Sam Club Life Member
YosemiteBobR is offline   Reply With Quote
Old 03-04-2008, 04:34 PM   #3
Administrator in Memoriam
 
Hitchhiker's Avatar


 
Appalachian Campers
Join Date: Jan 2000
Location: Buladean, NC
Posts: 8,127
Generally, if one cell needs water more often that the others it's indicative that cell is going bad and the battery will fail soon. After a full charge test the specific gravity of each cell with a hydrometer and observe if the cells that use water faster have a lower reading.
__________________
'11 GMC Acadia SLT AWD
'11 GMC Sierra 1500 4x4 Extended Cab
Hitchhiker is offline   Reply With Quote
Old 03-04-2008, 05:14 PM   #4
Senior Member
 
YosemiteBobR's Avatar
 
Thor Owners Club
Ford Super Duty Owner
Join Date: Apr 2005
Location: So Cal
Posts: 788
OK, when do you test with the hydrometer. Do you shut the charger off and test a pacific time afterward or can you test immediately?
__________________
2015 Four Winds Super C 33SW, w 6.7 Diesel 300HP - 660 lbs of torque
2011 Jeep Wrangler Sport as towed vehicle
Good Sam Club Life Member
YosemiteBobR is offline   Reply With Quote
Old 03-04-2008, 05:20 PM   #5
Administrator in Memoriam
 
Hitchhiker's Avatar


 
Appalachian Campers
Join Date: Jan 2000
Location: Buladean, NC
Posts: 8,127
Turn off the converter after it's had ample time to charge the batteries (unplug the shore power), let it sit for a 10-15 minutes to let the surface charge settle, then check the specific gravity. All should be the same or very close on a good battery.
__________________
'11 GMC Acadia SLT AWD
'11 GMC Sierra 1500 4x4 Extended Cab
Hitchhiker is offline   Reply With Quote
Old 03-05-2008, 07:40 AM   #6
Senior Member
 
YosemiteBobR's Avatar
 
Thor Owners Club
Ford Super Duty Owner
Join Date: Apr 2005
Location: So Cal
Posts: 788
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Hitchhiker:
Turn off the converter after it's had ample time to charge the batteries (unplug the shore power), let it sit for a 10-15 minutes to let the surface charge settle, then check the specific gravity. All should be the same or very close on a good battery. </div></BLOCKQUOTE>


So here are my numbers: What do ya think. Looks like Bat 1 is bad, but can I change one without changing all the others?

Battery 1
80 deg 1200
80 deg 1275
80 deg 1225

Battery 2
65 deg 1250
65 deg 1250
70 deg 1300

Battery 3
55 deg 1275
50 deg 1275
50 deg 1275

Battery 4
55 deg 1275
55 deg 1275
50 deg 1250
__________________
2015 Four Winds Super C 33SW, w 6.7 Diesel 300HP - 660 lbs of torque
2011 Jeep Wrangler Sport as towed vehicle
Good Sam Club Life Member
YosemiteBobR is offline   Reply With Quote
Old 03-05-2008, 08:08 AM   #7
Senior Member
 
becks's Avatar
 
Join Date: Sep 2006
Location: Fulltime/ SE Minnesota
Posts: 2,544
If one battery is bad you should change all. If not your old one will degrade the new one. This would be recomended whether you have two or three coach batteries.
__________________
06 TS-42-DS04
1040 watts of solar
2014 Jeep Rubicon/2003 Honda CRV
becks is offline   Reply With Quote
Old 03-05-2008, 08:18 AM   #8
Senior Member
 
YosemiteBobR's Avatar
 
Thor Owners Club
Ford Super Duty Owner
Join Date: Apr 2005
Location: So Cal
Posts: 788
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by becks:
If one battery is bad you should change all. If not your old one will degrade the new one. This would be recomended whether you have two or three coach batteries. </div></BLOCKQUOTE>

That makes perfect sense, so I'm assuming that battery 1 is truly bad?
__________________
2015 Four Winds Super C 33SW, w 6.7 Diesel 300HP - 660 lbs of torque
2011 Jeep Wrangler Sport as towed vehicle
Good Sam Club Life Member
YosemiteBobR is offline   Reply With Quote
Old 03-05-2008, 08:37 AM   #9
Administrator in Memoriam
 
Hitchhiker's Avatar


 
Appalachian Campers
Join Date: Jan 2000
Location: Buladean, NC
Posts: 8,127
Based on the following chart, battery 1 has a weak cell. The cell reading 1.200 has approximately a 60% charge while the other two cells are 100%. Battery 2, while not as weak as #1, is starting to go.

Batteries 2 and 3 may still have some life but I don't think you'll want to use them with two new ones, maybe you could find another use for those two such as a boat or a golf cart. Maybe a friend's RV that uses two 12v batteries would want to swap the two 6's in.

If you don't boondock a lot you could pull the two weak batteries out and just use the two good ones until they go bad. Then buy all 4 at the same time.

Chart:
<UL TYPE=SQUARE><LI>100% 1.265
<LI>75% 1.225
<LI>50% 1.190
<LI>25% 1.155
<LI>Discharged 1.120[/list]
__________________
'11 GMC Acadia SLT AWD
'11 GMC Sierra 1500 4x4 Extended Cab
Hitchhiker is offline   Reply With Quote
Old 03-06-2008, 11:27 AM   #10
Senior Member
 
Join Date: May 2007
Posts: 632
this sounds like a good case for an equalization charge (the real kind) followed by some desulfation charging.
__________________
BryanL is offline   Reply With Quote
Old 03-06-2008, 02:09 PM   #11
Senior Member
 
Workhorse Chassis Owner
Join Date: Feb 2005
Location: western wa.
Posts: 539
also check alternator charging rate at the batteries. anything over 14.2 will use water. don't be surprised to see 14.6 or 14.8. workhorse says its ok but the battery people don't like it.
__________________
2007 NRV DOLPHIN LX 6342

WORKHORSE W-22
cannon man is offline   Reply With Quote
Old 03-06-2008, 06:23 PM   #12
Senior Member
 
YosemiteBobR's Avatar
 
Thor Owners Club
Ford Super Duty Owner
Join Date: Apr 2005
Location: So Cal
Posts: 788
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Posted March 06, 2008 12:27 PM Hide Post
this sounds like a good case for an equalization charge (the real kind) followed by some desulfation charging.
Posts: 57 | Registered: May 24, 2007


cannon man
Posted March 06, 2008 03:09 PM Hide Post
also check alternator charging rate at the batteries. anything over 14.2 will use water. don't be surprised to see 14.6 or 14.8. workhorse says its ok but the battery people don't like it. </div></BLOCKQUOTE>


I plan on doing the equalization charge tomorrow morning as a matter of fact, for the whole 8 hours. If all else fails I will just remove two of the batteries for now until the last two go bad and replace them all at once. It has been 5 1/2 years so they are due. As far as the alternator, have not had that problem as I charge right at 13.8, but thanks for the thought.
__________________
2015 Four Winds Super C 33SW, w 6.7 Diesel 300HP - 660 lbs of torque
2011 Jeep Wrangler Sport as towed vehicle
Good Sam Club Life Member
YosemiteBobR is offline   Reply With Quote
Old 03-07-2008, 03:42 PM   #13
Senior Member
 
YosemiteBobR's Avatar
 
Thor Owners Club
Ford Super Duty Owner
Join Date: Apr 2005
Location: So Cal
Posts: 788
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by YosemiteBobR:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Hitchhiker:
Turn off the converter after it's had ample time to charge the batteries (unplug the shore power), let it sit for a 10-15 minutes to let the surface charge settle, then check the specific gravity. All should be the same or very close on a good battery. </div></BLOCKQUOTE>


So here are my numbers: What do ya think. Looks like Bat 1 is bad, but can I change one without changing all the others?

Battery 1
80 deg 1200
80 deg 1275
80 deg 1225

Battery 2
65 deg 1250
65 deg 1250
70 deg 1300

Battery 3
55 deg 1275
50 deg 1275
50 deg 1275

Battery 4
55 deg 1275
55 deg 1275
50 deg 1250 </div></BLOCKQUOTE>



So, the above were before "EQUALIZATION" and below is after. I did the full cycle of 8 hours and it turned off automatically. I let it set to cool with everything off and took these measurements:

Battery 1
1300
1250
1250

Battery 2
1250
1225
1300

Battery 3
1225
1225
1225

Battery 4
1200
1225
1225

Both the batteries in question 1 and 2 seem to be all over the scale but much higher than previous. Anyone know what that means? At least they are in the "good" area.
__________________

__________________
2015 Four Winds Super C 33SW, w 6.7 Diesel 300HP - 660 lbs of torque
2011 Jeep Wrangler Sport as towed vehicle
Good Sam Club Life Member
YosemiteBobR is offline   Reply With Quote
Reply



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
How low is OK, Battery voltage oldpa Winnebago Industries Owner's Forum 16 01-08-2009 12:52 PM
Low battery voltage moldmkr Winnebago Industries Owner's Forum 6 09-18-2008 08:00 PM
Battery charge level, how low is too low? oldpa Winnebago Industries Owner's Forum 5 01-26-2008 04:14 AM
Battery Voltage How Low is TOO LOw??? Latitude MH-General Discussions & Problems 5 01-08-2008 03:11 PM
Low battery jk_and_dog Winnebago Industries Owner's Forum 6 07-16-2007 10:05 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:22 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.