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Old 03-19-2014, 10:28 PM   #1
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Power question

Had an initial look at a used 2012 21ssL. Will shore/household power not run all systems on the trailer regardless if the batteries are installed? The owner had to hook up the batteries to get the interior lights to work even though he was plugged into his house.
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Old 03-19-2014, 10:36 PM   #2
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The converter should have ran the lights with no battery hooked up. If it has slides, it will need the help of a battery. If you use the furnace you will need a good battery.
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Old 03-19-2014, 10:44 PM   #3
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Originally Posted by RACKMAN View Post
Had an initial look at a used 2012 21ssL. Will shore/household power not run all systems on the trailer regardless if the batteries are installed? The owner had to hook up the batteries to get the interior lights to work even though he was plugged into his house.
Something is not right if the only way the lights work is with a battery and the unit was plugged into shore power.

Possibilities.
Bad converter.
Bad wiring connection.
Breaker is tripped for converter.
Battery Reverse polarity fuses blown in converter.
There was actually no shore power going to camper "breaker in house was tripped"


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Old 03-19-2014, 11:27 PM   #4
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No I think that if you don't have the battery hooked up you will have an open circuit for the 12 volt converter. had this same thing on my wildwood tt.
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Old 03-19-2014, 11:48 PM   #5
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Where is the converter and breakers located on the 21ssL?
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Old 03-20-2014, 08:44 AM   #6
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No I think that if you don't have the battery hooked up you will have an open circuit for the 12 volt converter. had this same thing on my wildwood tt.

Ron, your lights should work with no batt. as long and the converter is working corretly. They will be a little dimmer, but they should work. Anything that needs a 'load' of power, the slides, and furnace will have a really hard time working with no batt, but the lights...will work. Disconnect your batt. and have the unit plugged in. If your lights do not work, then you may need to look into it.
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Old 03-20-2014, 08:49 AM   #7
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Les is correct.
If there's no battery and shore power is hooked up and the converter is working then all 12v items should work.

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Old 03-20-2014, 08:49 AM   #8
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I've read reports on here that some WFCO converters won't work without a battery.
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Old 03-20-2014, 09:14 AM   #9
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I've read reports on here that some WFCO converters won't work without a battery.
To correct that......

The wfco system "will" work without a battery but it's NOT recommended to run without a battery.

They are designed to have that battery as a buffer.

Whereas progressive dynamics 9200 series converters are designed to run without a battery.

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Old 03-20-2014, 09:18 AM   #10
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I've read reports on here that some WFCO converters won't work without a battery.

Is it the 'converters' or is it some of the 12v systems that will not work with out a batt? Some systems do not have the ummff to get going that a low voltage trickle charge of the converter can produce when needed. I know that the furnace will not start up with out the battery, or even a with a bad battery (camped in the snow and blow...no heat..shorted old age batt., new batt,furnace on... momma happy) Same with the slide motors.... the converter will not be able to put out enough consistent steady juice to get them going with the force needed. I will never say that all converters 'need' a battery to 'produce' 12v juice.... but it seems strange to me. I am what is called a 'generalist', I know a lot about a lot of stuff, but expert in nothing.... that is why I am married.... she is the one that know 'everything'.....

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