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02-01-2008, 07:36 AM
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#1
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1 Rivet Member
1989 34.5' Airstream 345
Dimmitt
, Texas
Join Date: Jun 2007
Posts: 9
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12 volt question
In my 1989 345 motorhome the 12 volt system starts losing power when we use it for about 2 days with the inverter charging the system. If I wait about 3 days with the inverter unplugged recharge the batteries and the system works great for about another 48 hours then the same problem. My Question is should I replace the batteries or look for another problem first.
Thanks
Max
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02-01-2008, 07:58 AM
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#2
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Retired.
Currently Looking...
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, At Large
Join Date: Jun 2003
Posts: 21,276
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Quote:
Originally Posted by maxr
In my 1989 345 motorhome the 12 volt system starts losing power when we use it for about 2 days with the inverter charging the system. If I wait about 3 days with the inverter unplugged recharge the batteries and the system works great for about another 48 hours then the same problem. My Question is should I replace the batteries or look for another problem first.
Thanks
Max
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If you are talking about the onboard house system, either the inverter power is not getting to the batteries, or the inverter is not functioning.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
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02-01-2008, 08:43 AM
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#3
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More than one rivet loose
Currently Looking...
Los Alamos
, New Mexico
Join Date: Feb 2006
Posts: 3,756
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Look for a bad connection. check all your grounds carefully.
__________________
Michelle TAC MT-0
Sarah, Snowball
Looking for a 1962 Flying Cloud
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02-01-2008, 09:08 AM
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#4
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Rivet Master
, Minnesota
Join Date: Aug 2003
Posts: 7,721
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There are lots of things to check, like transfer switches, fuses, relays. If you want to start chasing down possible problems you'll need a good voltmeter and a schematic.
Otherwise take it to a dealer or Camping World. Don't start replacing stuff until you have a diagnosis, that's the most expensive method.
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02-01-2008, 10:27 AM
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#5
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Rivet Master
2009 27' FB Flying Cloud
1982 31' International
1991 35' Airstream 350
Jay
, Oklahoma
Join Date: Oct 2006
Posts: 1,706
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I agree with Terry. Teh symptoms indicate either the invertor is not working, or the energy it is producing is not making it to the batteries. A multi-meter and a little time should lead you to the problem in short order.
__________________
Jeff & Cindy
'09 27FB Flying Cloud;'82 31 International
'91 350 LE MH; '21 Interstate 24GT
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02-01-2008, 11:15 AM
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#6
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3 Rivet Member
Currently Looking...
2005 22' Interstate
Afton
, Virginia
Join Date: Sep 2005
Posts: 226
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I'm Confused
Quote:
Originally Posted by maxr
In my 1989 345 motorhome the 12 volt system starts losing power when we use it for about 2 days with the inverter charging the system. If I wait about 3 days with the inverter unplugged recharge the batteries and the system works great for about another 48 hours then the same problem. My Question is should I replace the batteries or look for another problem first.
Thanks
Max
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I'm not trying to be smart or anything, but, an inverter USES power from the batteries. A converter is the unit that CHARGES the batteries. From the description, I don't see where a problem exists; things appear normal to me.
Please explain further.
regards
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02-01-2008, 11:34 AM
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#7
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2 Rivet Member
2004 28' International CCD
Franklin
, Tennessee
Join Date: Oct 2003
Posts: 93
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Put a digital voltmeter across the batteries when plugged in when you expect to be charging. You should see 13.5 to 14 volts or so. (I'm sure this is nothing new to you). If your batteries have gone through a number of big discharges the batteries can be "surface charging" only and not capable of holding a charge; ie, they are bad. You coulds also have a cell in one battery bad which will cause the battery to heat up abnormally, Id feel the batteries for a difference in heat. Just some thoughts. GG
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02-01-2008, 12:24 PM
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#8
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Retired.
Currently Looking...
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, At Large
Join Date: Jun 2003
Posts: 21,276
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Quote:
Originally Posted by herrgirdner
I'm not trying to be smart or anything, but, an inverter USES power from the batteries. A converter is the unit that CHARGES the batteries. From the description, I don't see where a problem exists; things appear normal to me.
Please explain further.
regards
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In his post, he did say the inverter was hooked up to charge the system. Probably a typo, they do sound similar, even if they perform opposite functions.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
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02-01-2008, 12:50 PM
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#9
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1 Rivet Member
1989 34.5' Airstream 345
Dimmitt
, Texas
Join Date: Jun 2007
Posts: 9
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12 volt question converter
the converter would be correct taking 120vac to 12 vdc sorry about the confusion
Max
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