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07-03-2022, 10:06 PM
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#1
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Junior Member
Join Date: Jul 2022
Posts: 8
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Coach batteries overcharging
Have a 2003 Damon Challenger.
Replaced 2 6 volt coach batteries. Now they have overcharged twice! Thought it was a fluke or something. Added water. Recharged them then reinstalled them
Plugged into 30 amp at campground. Found the batteries boiling.
What causes that and how do i fix it?
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07-03-2022, 10:32 PM
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#2
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Senior Member
National RV Owners Club Forest River Owners Club
Join Date: Nov 2019
Location: Florida
Posts: 216
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Quote:
Originally Posted by Umbrella
Have a 2003 Damon Challenger.
Replaced 2 6 volt coach batteries. Now they have overcharged twice! Thought it was a fluke or something. Added water. Recharged them then reinstalled them
Plugged into 30 amp at campground. Found the batteries boiling.
What causes that and how do i fix it?
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When you hooked your batteries up did you install them in series or parallel?
If you hooked them pos to pos ,neg to neg you made them a 6 volt bank which means your converters trying to charge a6volt battery bank wit 13
6 volts
The batteries need to be hooked pos from one the negative on the other. The other negative and positive post will hook to the house pos and neg accordingly.
If it hooked up properly then you need to check what your converter is putting out to the batteries it should be between 13.6 and 14.5 volts .I am not sure where your converter is in your unit but is either part of your distribution center, behind it ,or in a cabinet or storage compartment near you batteries
__________________
All days are good days; just different levels of good!  :
2022- ?? 2005 Georgetown xl 370
2019 - 2022: :1996 National Sea Breeze ( Traded in )
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07-04-2022, 09:17 AM
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#3
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 25,956
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Simplest explanation is that the batteries are miswired, 6v in parallel instead of series. Guaranteed overcharge.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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07-04-2022, 09:26 AM
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#4
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Senior Member
Join Date: Oct 2014
Posts: 6,556
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Yup, incorrect wiring would be first suspect (charging a 6 VDC battery as if it were a 12 VDC battery).
If that isn't it, you will need to let us know what converter, charger or inverter/charger ou are using.
__________________
Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
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07-04-2022, 09:32 AM
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#5
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Senior Member
Join Date: Jul 2021
Posts: 454
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Quote:
Originally Posted by Umbrella
Have a 2003 Damon Challenger.
Replaced 2 6 volt coach batteries. Now they have overcharged twice! Thought it was a fluke or something. Added water. Recharged them then reinstalled them
Plugged into 30 amp at campground. Found the batteries boiling.
What causes that and how do i fix it?
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what power center/convertor does your coach have?
I don't gamble but I want to bet it's a magnetek which are known to cook batteries.
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07-04-2022, 11:25 AM
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#6
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Community Moderator
Join Date: Sep 2011
Location: Between the Oceans
Posts: 7,969
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If not miswired, the charger could have been left on equalization mode.
__________________
Steven & Polly
2000 Country Coach Intrigue 40' ISC 350
2018 Ford Explorer 4WD
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07-04-2022, 12:57 PM
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#7
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Junior Member
Join Date: Jul 2022
Posts: 8
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Thanks everyone! They are hooked up correctly. I will check on the inverter.
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07-04-2022, 02:16 PM
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#8
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Senior Member
Join Date: Jul 2014
Posts: 32,692
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If you have an inverter/charger, it's BTS ( Battery Temp Sensor ) may be bad.
Easy test is to unplug it, charger defaults to 77° F.
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07-04-2022, 02:36 PM
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#9
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 28,007
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Quote:
Originally Posted by twinboat
If you have an inverter/charger, it's BTS ( Battery Temp Sensor ) may be bad.
Easy test is to unplug it, charger defaults to 77° F.
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 When my Xantrex BTS went bad, it was floating the battery bank @ 14.2VDC. I simply unplugged it and left it that way. Now the float is 13.3VDC
I am not replacing the BTS.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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07-09-2022, 11:26 AM
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#10
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Junior Member
Join Date: Jul 2022
Posts: 8
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The inverter has a box that says WIZARD.
What should that do? Green or flashing?
Checked and batteries charge too fast when motorhome is plugged in.
Ideas?
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07-09-2022, 11:38 AM
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#11
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Junior Member
Join Date: Jul 2022
Posts: 8
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What is Charge Wizard? What do we do with it?
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07-09-2022, 12:00 PM
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#12
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Senior Member
Join Date: Sep 2018
Posts: 279
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It’s an add on device for a Progressive Dynamics battery charger that turns it into a “smart” or three stage charger.
Do you have a voltmeter? If not, go buy one. Every RV owner should have one.
With the coach not plugged in, what is the voltage of the battery bank?
With the coach plugged in, what is the voltage?
Let’s get some data and the diagnosis of the problem will be based on facts and not guesses.
__________________
Richard Entrekin
99 Newell,Subie Outback toad
Inverness, Fl
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07-09-2022, 12:27 PM
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#13
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Senior Member
Join Date: Jul 2014
Posts: 32,692
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If you have a charge wizard, you have a converter/charger. That's not an inverter.
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07-10-2022, 12:59 PM
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#14
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Junior Member
Join Date: Jul 2022
Posts: 8
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We have a Intelipower 9100. It has a Wizard on the side which I think is an add-on.
Got new battery. 12V Deep cycle marine and RV battery.
When installed in the motorhome and motorhome is plugged in it almost immediately begins to overcharge.
Do I need a new Intelipower 9100? It worked fine since we have had it for 9 years. Do they fail?
Remember this started with replacing 2 6volts that seemed to have frozen after a cold winter. Replaced with 2 6 volt golf cart batteries that overcharged twice.
Now have 12volt deep cycle marine rv Interstate Battery. It began to overcharge immediately.
Could the problem be anything other than the Intelipower 9100? I can buy another one for $365. Should I?
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