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06-05-2023, 06:28 AM
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#1
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Established Member
Join Date: Mar 2023
Location: Sweet Springs
Posts: 14
M.O.C. #32418
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12 volt power issues
Got up yesterday to find 12 volt power like all 12 volt lights barely working and finally stopped I was plugged in to 50 Amp shore power.
Also 110 volt outlets were only working at partial power.
Reset all 110 breakers even though none were tripped
Power came back on 110 and 12 volt systems.
What would cause that?
Also house batteries will not charge on shore power I have to keep a battery charger on them that I keep plugged into one of the outside outlets on the RV
Think it’s all related??
2010 Montana Mountaineer 37 ft bunkhouse
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06-05-2023, 06:57 AM
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#2
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Montana Fan
Join Date: Jul 2019
Location: Mesa
Posts: 279
M.O.C. #24588
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Quote:
Originally Posted by tonythepony
Got up yesterday to find 12 volt power like all 12 volt lights barely working and finally stopped I was plugged in to 50 Amp shore power.
Also 110 volt outlets were only working at partial power.
Reset all 110 breakers even though none were tripped
Power came back on 110 and 12 volt systems.
What would cause that?
Also house batteries will not charge on shore power I have to keep a battery charger on them that I keep plugged into one of the outside outlets on the RV
Think it’s all related??
2010 Montana Mountaineer 37 ft bunkhouse
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You’ve not provided enough info to get a simple answer. I’d suggest you start at the batteries. If they have been depleted to where the lights quit working, consider replacing them, regardless of age. Consider installing lithium batteries. Amazon for example has Chin branded lithiums for just over $300 each. The battery protects itself from over discharge (as does most lithiums). The second item to investigate is the voltage converter. If the 12 volt lights stay on with the batteries disconnected, then the converter is working. You don’t state how you determined the 120 volt system was working at “partial power”. BTW using the term 110 volts casts doubt about this. The only link between the 12 volt and 120 volt systems, is the voltage converter. If your batteries were toast and the shore power suffered a “brownout” then yes you could have had the symptom you described. Had an EMS such as the Progressive PT50X been in place, it could have diagnosed and stored a trouble code. An EMS can prevent damage to all your electrical devices….A/C, microwave, radio etc.
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06-05-2023, 08:35 AM
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#3
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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First check your converter. On a 12 year old rig it could certainly be going bad and flipping its breaker may have given it a jolt to restart working. As far as charging the batteries, make sure your battery disconnect is in the proper setting. If you can remove the key it's off and the batteries won't charge. Do not change to lithium batteries as your converter isn't made to charge them, they weren't even invented back then.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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06-05-2023, 08:52 AM
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#4
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,732
M.O.C. #24086
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__________________
Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
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06-05-2023, 09:11 AM
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#5
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Montana Fan
Join Date: Jul 2019
Location: Mesa
Posts: 279
M.O.C. #24588
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Quote:
Originally Posted by DQDick
First check your converter. On a 12 year old rig it could certainly be going bad and flipping its breaker may have given it a jolt to restart working. As far as charging the batteries, make sure your battery disconnect is in the proper setting. If you can remove the key it's off and the batteries won't charge. Do not change to lithium batteries as your converter isn't made to charge them, they weren't even invented back then.
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Actually lithium batteries can be charged from a standard OEM voltage converter.
There is ample evidence that charging lithiums at say 13.6 volts instead of 14.4 volts extends the lifespan of the battery.
Here is a screen shot from Battle Born presentation.
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06-05-2023, 10:40 AM
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#6
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Established Member
Join Date: Mar 2023
Location: Sweet Springs
Posts: 14
M.O.C. #32418
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12 volt issue
Quote:
Originally Posted by firestation12
You’ve not provided enough info to get a simple answer. I’d suggest you start at the batteries. If they have been depleted to where the lights quit working, consider replacing them, regardless of age. Consider installing lithium batteries. Amazon for example has Chin branded lithiums for just over $300 each. The battery protects itself from over discharge (as does most lithiums). The second item to investigate is the voltage converter. If the 12 volt lights stay on with the batteries disconnected, then the converter is working. You don’t state how you determined the 120 volt system was working at “partial power”. BTW using the term 110 volts casts doubt about this. The only link between the 12 volt and 120 volt systems, is the voltage converter. If your batteries were toast and the shore power suffered a “brownout” then yes you could have had the symptom you described. Had an EMS such as the Progressive PT50X been in place, it could have diagnosed and stored a trouble code. An EMS can prevent damage to all your electrical devices….A/C, microwave, radio etc.
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12 volt batteries were at approximately 90% charge according to my gage
Battery charger was only showing 5.8 volts charging ( normally at 12-13 volts. 12 volt lights were on but very dim
A/C kicked on then right back off
Jacks and slides would not make a sound
Battery charger was plugged in to outside plugs on camper
Only after I reset all shore power breakers inside the camper fuse box
After all were flipped off and then back normal 12 volt and 110 shore power worked fine
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06-05-2023, 10:51 AM
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#7
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Established Member
Join Date: Mar 2023
Location: Sweet Springs
Posts: 14
M.O.C. #32418
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Where would the converter be located on my 2010 Montana Mountaineer?
I don’t think my batteries are being charged while plugged in to shore power.
When I get back to the camper I will check the battery voltage plugged in to shore power and then unplugged
The battery charge indicator inside the camper continues to go down plugged in to shore power when using the 12 volt system including lights and water pump.
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06-05-2023, 10:52 AM
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#8
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Montana Master
Join Date: Dec 2007
Location: Kansas City, Missouri
Posts: 2,710
M.O.C. #7992
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The partial power is confusing. Your fix leaves the possibility one side of your 50amp breaker was tripped even if it didn't look like it. The side that was tripped also controlled the 120 volts to the converter. Or, the breaker feeding the converter was tripped.
__________________
2006 3000RK
2009 Ram 2500
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06-05-2023, 12:11 PM
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#9
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,199
M.O.C. #6433
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Just to make sure you are aware. Circuit breaker handles do not flip to OFF when tripped. They just move slightly from the ON position. Not always obvious by just looking when one is tripped. If a breaker is tripped and you push the handle toward the ON position you will feel it move a fraction of an inch with a “soft” feel. OFF to ON resets it.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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