Thread Tools Display Modes
Old 08-24-2011, 07:35 AM   #1
Junior Member
Join Date: Aug 2011
Posts: 13
Coach Batteries

My coach batteries slowly lose their charge while I am on external 50 amp service. The coach batteries only fully charge when charged off the engine alternator. I have run the generator for 4 hours and the coach batteries get to 75 percent charged. Any ideas what this may be an early symptom of?

MikSher is offline   Reply With Quote
Old 08-24-2011, 07:58 AM   #2
Senior Member
Join Date: Dec 2010
Location: Regina, Saskatchewan
Posts: 310
Sounds to me like your converter, that charges the batts when you are on shore power is loosing it..have the output of the converter checked. The other reason may be that you have old batts and they are sulfated. Old batts are hard to charge and the alternator on the engine puts out a hefty amount but the converter does not thus...the batts get a better shot with the alternator. My money would be on your converter not working properly.

polkatronron is offline   Reply With Quote
Old 08-24-2011, 09:00 AM   #3
Phat Phrog Stunt Team
TURBS's Avatar
Join Date: Aug 2011
Location: Iowa
Posts: 34,423
I'm with polkatronron!
possibility of weak or bad charger and bad batterys.
depending on how many batteries you have and how low they are it may take days to charge with a good charger.
Most coaches have an inverter / charger.
I just put one in my employer s coach for same reason.
$1,000 bill
TURBS is offline   Reply With Quote
Old 08-24-2011, 09:48 PM   #4
Junior Member
Join Date: Aug 2011
Posts: 13
I just had converter checked and it is the problem. Thanks for the help.
MikSher is offline   Reply With Quote
Old 08-25-2011, 10:36 AM   #5
Senior Member
nemo45's Avatar
Join Date: Aug 2010
Location: Arlington, WI
Posts: 229
Send a message via MSN to nemo45 Send a message via Yahoo to nemo45
Wondering what converter you have? If its a Parallax I'd replace it with an Intelli-Power PD4655. Its a direct replacement for the Parallax and has a much better 4 stage charger (charge wizard). You can look at them at Only runs $205. I'm going to replace my Parallax soon and mine is working ok. These 4 stage chargers are much better for your batteries.
Don & Carol Niemeyer and Sandy
2006 Gulf Stream Tour Master Diesel Pusher
2011 Chevy Equinox Toad
nemo45 is offline   Reply With Quote
Old 08-25-2011, 08:01 PM   #6
Junior Member
Join Date: Aug 2011
Posts: 13
Thanks for the suggestion. I will do my homework through best converter web site.

MikSher is offline   Reply With Quote


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 is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 07:07 PM.