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Old 06-05-2013, 06:32 PM   #1
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120VAC to 12VDC converter issues

Well, my battery issues have returned again. After being plugged into shore power for a week, the engine would not crank over even with the coach battery "boost" enabled.

I suspect my coach batteries (2 each 6 Volt GC2) are at an end of their life and probably will need to be replaced. Their untimely demise may have been quickened by the poor battery charging/maintaining system I have.

Before investing in new coach batteries, I'd like to upgrade the 12V converter in the rig to one that has a better charging/maintaining system. One line of converter products that look good are the Progressive Dynamics PD92XXCV products with the built-in Charge Wizard circuitry. (the "XX" part of the model number denotes the DC current output....e.g. 45 Amps, 60 Amps, etc.)

Now the questions.........

1) My existing converter is located in the basement bay directly in front of the coach door. It is a nondescript brown box, slightly larger than a loaf of bread. There are no labels or manufacturer info that can be seen. Any ideas on the manufacturer and current output??? 45 Amp?? 60 Amp???

2) The output of the converter goes to a 50 Amp breaker on the 12 Volt distribution board. If I upgrade to the Progressive Dynamics unit, will the Charge Wizard's charging profiles "pass thru" the existing distribution board, or do I need to re-wire the converter to my batteries??

3) Since the converter is fed off a 120 Volt circuit, it should charge the batteries whether on shore power or generator power. Right??

4) The above questions were regarding the coach batteries. But how about my chassis battery? Will the 12V distribution board or the converter charge the chassis battery AS WELL as my coach batteries???

Thanks for all your help.
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Old 06-05-2013, 11:52 PM   #2
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Your coach may never have been wired up to charge the chassis batteries; lots aren't ; BUT in the case of the coach batteries being in poor shape my have effected the situation.
On my unit the chassis batteries will charge automatically ; only when the coach batteries are fully charged.
Can you post a picture of you current set up ? Could be someone will recognise it.
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Old 06-06-2013, 01:56 PM   #3
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Here is the converter and the 12V distribution board on my rig. Can anyone identify the converter brand and current rating? Click image for larger version

Name:	photo.JPG
Views:	205
Size:	471.0 KB
ID:	40226
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Old 06-07-2013, 09:56 AM   #4
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The issue of the chassis battery charging has been discussed on the Nationl RV forum. Your 12 volt distribution board does control the charging of the coach and chassis batteries. The cause of the chassis battery not charging when connected to shore power is either a bad relay or a problem with the control board. Do a search on the forum for a post I made about charging problems. If you can't find it let me know.

Chuck
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Old 06-07-2013, 10:22 AM   #5
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In your post on 4/13/13 asking for help with battery charging Help needed with battery charging there was a discussion about the 12 volt control board and charging the coach and chassis batteries. Have you called RV Custom Products and talked to them about the problem. If you give them the board version number they can tell if your is set up for bi-directional charging. I can't help with identifying your converter, I have a Progressive dynamics converter on my MH.

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Old 06-07-2013, 06:52 PM   #6
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Quote:
Originally Posted by Karlos View Post
Here is the converter and the 12V distribution board on my rig. Can anyone identify the converter brand and current rating? Attachment 40226
Looks like the one I replaced by just wiring it wire for wire and a piece of cake. The new one weighs nothing by comparison and does the job 100% better.
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