Reply
 
Thread Tools Display Modes
 
Old 03-13-2019, 07:30 PM   #51
Bus Crazy
 
Join Date: Jun 2013
Location: Picton,Ont, Can.
Posts: 1,520
Year: 1997
Coachwork: Bluebird
Chassis: GMC
Engine: Cat 3116
Rated Cap: 72
Quote:
Originally Posted by TeacherJoe View Post
I have them charging. I now know all must match CCA.

Joe

Thanks Joe for the pics. Charging will help yes. Cable ends are in bad need of cleaning. Got a dremel tool with wire wheel attachments? That and the baking soda paste will be good.
Not only the cable ends but the jumpers from one battery to another, clean them up also. And then the battery posts themselves. Get rid of the dust etc too, grease, grime. These all rob power and likely are the loss in your case of starting power as compared to any other thing causing a parasitic draw.


I know its a pain to lug them to a shop for testing for load but even though they are relatively new, do so and then you have a benchmark of where their life is at. At least take the two that match.

Mismatched batteries will confuse a charger so, try starting with 2 batteries when you get things back together. If it all works out then you can likely add the third charged battery into the mix. Otherwise you will need to charge each individually which is more disconnecting and reconnecting work for you.

Batteries are not to be installed and forgotten, minimum 6 months for cleanliness, tight connections etc. Yours are maintenance free as far as electrolyte goes only. I buy only those with a cap for each cell so I can better see what goes on with each cell in each battery. Anal, yup!


John
__________________
Question everything!
BlackJohn is offline   Reply With Quote
Old 03-13-2019, 08:27 PM   #52
Bus Crazy
 
david.dgeorge07's Avatar
 
Join Date: May 2017
Location: Chattanooga, TN
Posts: 1,142
Year: 2001
Coachwork: Thomas
Chassis: Thomas
Engine: CAT 3126
While it is true that the batteries should all match I canít imagine that your problem is because of a difference of 25 cca in battery rating.

The two matched batteries should be easily able to start your bus if they are in decent condition.

My bus came to me with mismatched batteries (only two) and it cranks well (unless I let it sit too long without opening the main breakers), even in cold weather when the grid heater is running at startup.

Iíll replace them with matching ones at some point, but I see little reason to until I they start to underperform.
__________________
My Build Thread:

http://www.skoolie.net/forums/f11/4-...ner-18205.html
david.dgeorge07 is offline   Reply With Quote
Old 03-14-2019, 05:29 AM   #53
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 16,871
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
Quote:
Originally Posted by david.dgeorge07 View Post
While it is true that the batteries should all match I canít imagine that your problem is because of a difference of 25 cca in battery rating.

The two matched batteries should be easily able to start your bus if they are in decent condition.

My bus came to me with mismatched batteries (only two) and it cranks well (unless I let it sit too long without opening the main breakers), even in cold weather when the grid heater is running at startup.

Iíll replace them with matching ones at some point, but I see little reason to until I they start to underperform.
They need to be the same CCA. Batteries with different CCA ratings mean they can discharge more or less current, this also mean they recharge at different rates. Not good when mixed in a set with others with different ratings.
__________________
.
Roll Your Own Build Thread
EastCoastCB is online now   Reply With Quote
Old 03-14-2019, 10:59 AM   #54
Bus Crazy
 
david.dgeorge07's Avatar
 
Join Date: May 2017
Location: Chattanooga, TN
Posts: 1,142
Year: 2001
Coachwork: Thomas
Chassis: Thomas
Engine: CAT 3126
Quote:
Originally Posted by EastCoastCB View Post
They need to be the same CCA. Batteries with different CCA ratings mean they can discharge more or less current, this also mean they recharge at different rates. Not good when mixed in a set with others with different ratings.

I donít disagree.
__________________
My Build Thread:

http://www.skoolie.net/forums/f11/4-...ner-18205.html
david.dgeorge07 is offline   Reply With Quote
Old 03-14-2019, 04:51 PM   #55
Almost There
 
Join Date: Oct 2018
Location: Connecticut
Posts: 92
Chassis: Freightliner
Engine: Cat C7
Charging Update

I pulled the batteries. Here's what's going on:

Battery #1 - 950 CCA dated 11/18. Left on Husky charger at 2A setting overnight until it read 12.6v. It sat about 8 hours and read 12.1v.

Battery #2 - 950 CCA dated 11/18. Left on charger and I returned to see fault code F03 and 8v.

Battery #3 - 925 CCA new battery. On charger at present. After a short time, it increased to 12.1v.

Did #1 discharge too fast?
Is #2 toast?
If #3 is OK, I intend to get another and use 2.

Joe
TeacherJoe is offline   Reply With Quote
Old 03-14-2019, 06:54 PM   #56
Bus Crazy
 
david.dgeorge07's Avatar
 
Join Date: May 2017
Location: Chattanooga, TN
Posts: 1,142
Year: 2001
Coachwork: Thomas
Chassis: Thomas
Engine: CAT 3126
Quote:
Originally Posted by TeacherJoe View Post
I pulled the batteries. Here's what's going on:



Battery #1 - 950 CCA dated 11/18. Left on Husky charger at 2A setting overnight until it read 12.6v. It sat about 8 hours and read 12.1v.



Battery #2 - 950 CCA dated 11/18. Left on charger and I returned to see fault code F03 and 8v.



Battery #3 - 925 CCA new battery. On charger at present. After a short time, it increased to 12.1v.



Did #1 discharge too fast?

Is #2 toast?

If #3 is OK, I intend to get another and use 2.



Joe


At a 2 amp setting you wonít get a full charge overnight. Those batts probably have close to 100 amp/hour capacity and 10 hours x 2 amps is only 20 amp/hours.

To get a true full trickle charge at 2 amps on big batts like that you need 48 hours or so if they are dead to start with.

Sounds like batt #2 is a real dud and is certainly capable of causing your problem of parasitic drain. There may be other problems to deal with but a battery in your bank sitting at 8 volts could easily cause the entirety of the symptoms you have described.

You should see charge voltages at least up into the 13s if not low 14s. Usuals float charge is mid 13s.

Is your charger a 3 stage or just fixed?
__________________
My Build Thread:

http://www.skoolie.net/forums/f11/4-...ner-18205.html
david.dgeorge07 is offline   Reply With Quote
Old 03-14-2019, 07:39 PM   #57
Almost There
 
Join Date: Oct 2018
Location: Connecticut
Posts: 92
Chassis: Freightliner
Engine: Cat C7
I think it’s not a three stage charger. It’s an old Husky.

If that means it charges at three rates, then yes. 2/6/10

Joe
TeacherJoe is offline   Reply With Quote
Old 03-16-2019, 04:24 PM   #58
New Member
 
Join Date: Dec 2018
Posts: 2
I have the same problem. You have to turn the bus every day or every other day to keep up with the charge, After a lot of jump start I got a battery disconnect and that is wht people who have similar vehicles do.
memecosta is offline   Reply With Quote
Old 03-16-2019, 06:26 PM   #59
Mini-Skoolie
 
Join Date: Dec 2018
Posts: 34
I think someone mentioned it but I’ll mention it again ; generally it’s not recommended to replace one Lead acid battery from a battery bank. It will likely be dragged down to the level of the older batteries. Apparently people are having better success replacing some Lithium batteries in a battery bank but I wouldn’t be surprised if the newer battery gets some degradation. The shift to Lithium is happening but it’s still very expensive. I’m not going to the one to experiment hopefully.
Im considering buying multiple smaller low battery disconnects. Then the loads will get switched off one at a time according to what voltage I select on the adjustment screw. Do big automatic low battery disconnects have terminals for a override switch? That would drain the batteries over time also but a small solar panel might keep up. Or better yet a big solar energy system to keep it all going. Then a small DC to DC Charger from the solar batteries to keep the starting batteries up. Argh, just when I thought it would be simple. As, unlike Lithium, Lead batteries don’t like to rest at low charge for long without degradation occurring. But there’s places for automatic low battery disconnects on pretty much any expensive battery bank. Lithium reaches its critical low point then drops off fast. But it’s very low.
As a starter is not meant to be drawing amps for more than a few seconds a heavy switch should hold up and not have time to get overly hot. As long as it close in rated amperage to the load. But it’s good generally to oversize and carefully consider placement. It sounds like modern electronics such as the engine computer are affected. Maybe a cheap cigarette lighter to cigarette lighter plug jumper cord would keep the computer going while batteries are being replaced?? The engine computer may not like being back fed like that however?? I don’t know. I’m looking at a 2004 Chevy bus so would like to know.
Doktari is offline   Reply With Quote
Old 03-16-2019, 06:56 PM   #60
Almost There
 
Join Date: May 2015
Posts: 95
One bad. Elk sucks the life out of the others. Replace and tight connections. I run 3 1100cca batteries cause starters are expensive.
Dirtdoctor is offline   Reply With Quote
Reply

Thread Tools
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


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 12:05 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.