Good Sam Club Open Roads Forum: Truck Campers: Shore Power??
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burningman

Seattle, WA USA

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Posted: 01/30/19 08:47am Link  |  Quote  |  Print  |  Notify Moderator

valhalla360 wrote:

Lights and water pump run off 12v...disconnect the battery and you had no 12v.

No reason to disconnect the battery when plugging into shore power.


The power converter in camper does provide 12 volt DC power and everything should be working whether there is a battery present or not, when plugged into shorepower the battery is entirely unnecessary.
That’s why that device is called a converter.

Either your converter is dead or something is turned off or disconnected.


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AnEv942

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Posted: 01/30/19 09:06am Link  |  Quote  |  Print  |  Notify Moderator

My opinion is the only silly questions are the ones not asked.
https://www.lancecamper.com/docs/2005%20........ers%20Manual%20-%20Lance_Lance%20Max.pdf
linked is the owners manual to download if you don't have, which may answer some basic questions. Page 27 of the pdf file talks about the 12v.
I assumed physically disconnecting battery cables-note if using a disconnect switch to turn off battery output to camper it also stops ability to charge them.

Once I’m set up at camp, I’ll have the battery connected and the power cord plugged into my generator during the day. I assume this will power all my 120v needs and charge the battery along the way for all 12v needs? Am I correct in that? Yes

Well now I have to go and pull my battery cables...I know our old converter did not supply 12v directly, but responses here make me wonder if replacement does. Just out of curiosity-


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wnjj

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Posted: 01/30/19 09:20am Link  |  Quote  |  Print  |  Notify Moderator

AnEv942 wrote:

Well now I have to go and pull my battery cables...I know our old converter did not supply 12v directly, but responses here make me wonder if replacement does. Just out of curiosity-

How could it not supply 12V directly? The lights and water pump are just 12V loads and so is a battery that is charging. The converter can’t tell the difference. Now some older converters need a battery for balasting or they would either produce too high of a voltage or have excessive ripple but there would still be power to the system.

If your camper disconnect was between the battery and load center but the converter was connected on the battery side then I could understand.

There were also some old style ones that had a switch to choose battery or converter to supply the RV but couldn’t charge the battery from the converter. My sisters 1980’s Coleman popup had that.

AnEv942

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Posted: 01/30/19 09:48am Link  |  Quote  |  Print  |  Notify Moderator

I dont know- out put of old converter went thru battery- if battery not wired, on shore with disconnect switch not engaged (either position) there was no 12v at fuse panel. My assumption (to assume is to error) was all output of new converter still went thru battery, never checked with battery not connected.

Edit:
I'll be dipped. Removed, isolated both battery positive leads, plugged in camper-
everything works, 13.5+ volts. Battery disconnect has no effect (Thinking out put of converter might go thru switch). Turning off converter 12v fades away. Though I dont think I would use converter to supply high loads directly- its possible to have 12v if battery dumps(and removed). Now I'm curious why and how the old converter behaved as it did- no changes were made to wiring.

Which makes me wonder about OPs converter and no 12v?

* This post was edited 01/30/19 11:03am by AnEv942 *

starcraft69

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Posted: 01/30/19 11:15am Link  |  Quote  |  Print  |  Notify Moderator

burningman wrote:

valhalla360 wrote:

Lights and water pump run off 12v...disconnect the battery and you had no 12v.

No reason to disconnect the battery when plugging into shore power.


The power converter in camper does provide 12 volt DC power and everything should be working whether there is a battery present or not, when plugged into shorepower the battery is entirely unnecessary.
That’s why that device is called a converter.

Either your converter is dead or something is turned off or disconnected.



This is a untrue statement in most RV today Battery must be present for power converter to supply power to 12v side of unit .


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Ty151

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Posted: 01/30/19 12:09pm Link  |  Quote  |  Print  |  Notify Moderator

Checked battery this morning, 13.8 volts on the meter.

I’m still confused as it seems there have been different opinions. It sounds like some believe lights and other 12v items should work with shore power independent from the battery. Some responses say battery needs to be connected no matter what.

I haven’t located my converter yet, so I’ll need to do that, but it seems like I need to find it and make sure it’s working correctly and that no circuits are turned off.

If the shore power doesn’t work, what have been your experiences with using battery power when dry camping or boondocking. I’ll be in the desert without hook ups for 2 nights and plan on spending most of my time out of the camper (not using power). I’ll charge electronics and other things in my portable generator. How long will a fully charged battery last? Rough estimate as I know there are several variables

2chiefsRus

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Posted: 01/30/19 12:24pm Link  |  Quote  |  Print  |  Notify Moderator

Ty151 wrote:

Checked battery this morning, 13.8 volts on the meter.

I’m still confused as it seems there have been different opinions. It sounds like some believe lights and other 12v items should work with shore power independent from the battery. Some responses say battery needs to be connected no matter what.

I haven’t located my converter yet, so I’ll need to do that, but it seems like I need to find it and make sure it’s working correctly and that no circuits are turned off.

If the shore power doesn’t work, what have been your experiences with using battery power when dry camping or boondocking. I’ll be in the desert without hook ups for 2 nights and plan on spending most of my time out of the camper (not using power). I’ll charge electronics and other things in my portable generator. How long will a fully charged battery last? Rough estimate as I know there are several variables


will you need to run your furnace? that's the biggest battery drain. also just because you aren't in the camper, doesn't mean things aren't using power. Some refrigerators draw power to run the electronic boards. Smoke detectors and propane detectors draw 12volt power.


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Ty151

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Posted: 01/30/19 12:32pm Link  |  Quote  |  Print  |  Notify Moderator

I may run the furnace at night for a short time, but not 100% sure that I will need it.

Eric&Lisa

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Posted: 01/30/19 01:05pm Link  |  Quote  |  Print  |  Notify Moderator

AnEv942 wrote:

...Battery disconnect has no effect (Thinking out put of converter might go thru switch). Turning off converter 12v fades away. ...


From the dredges of my memory, I seem to recall this is not a good thing for the converter. If a heavy load is present, it cannot put out enough power to feed it, and can cause the converter to fail. Certainly good for a test with a few lights, but I wouldn't go turning on the furnace or running the electric jacks.

-Eric


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burningman

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Posted: 01/30/19 01:14pm Link  |  Quote  |  Print  |  Notify Moderator

A “battery charger” may need to detect a load to charge.
A “converter” converts 120 VAC to 12 VDC. No battery needed.
My 1967 Security did it, and everything in between up to my 2017 model, with the batteries physically removed.

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