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Old 02-05-2020, 10:19 AM   #1
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On Shore Power With No Battery

Are there any issues with leaving trailer plugged in to shore power 24/7 with out the battery in the trailer? Thank you.
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Old 02-05-2020, 11:37 AM   #2
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No issue with leaving it plugged it, but why would the battery not be installed?
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Old 02-05-2020, 11:58 AM   #3
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Both my 12 volt batteries have quick disconnect plugs so I can use them to power my trolling motors at the cabin and backup power in the winter when the power goes out at home. My trailer is plugged in and the batteries are only in the trailer for 4 month out of the year. I have not had a problem yet...
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Old 02-05-2020, 12:03 PM   #4
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I’m asking here, not telling. Are there devices such as propane detectors, refrigerator ignition, thermostats etc, that depend upon 12v DC to operate? If you don’t need them when the batteries are out you’d be ok.
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Old 02-05-2020, 12:10 PM   #5
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The power unit in the trailer supplies 12 volts to the 12 volt items...like lights etc while the batteries are not installed. Just don’t get carried away and plug in a 12 volt item that requires 10 to 20 amps to run.
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Old 02-05-2020, 12:21 PM   #6
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I keep batteries in the garage for winter. Easier to watch electrolyte level and put it on a prolonged charge every so often.
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Old 02-06-2020, 12:42 AM   #7
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Originally Posted by Eggscape View Post
The power unit in the trailer supplies 12 volts to the 12 volt items...like lights etc while the batteries are not installed.
I agree - if there is something that needs 12 volts DC to run, it will run with the converter... so as long as the AC power is as reliable as you need those 12 V things to be, life is good.

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The power unit in the trailer supplies 12 volts to the 12 volt items...like lights etc while the batteries are not installed. Just don’t get carried away and plug in a 12 volt item that requires 10 to 20 amps to run.
Why not? It's a 55 amp converter.
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Old 02-06-2020, 06:49 AM   #8
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Originally Posted by Brian B-P View Post
I agree - if there is something that needs 12 volts DC to run, it will run with the converter... so as long as the AC power is as reliable as you need those 12 V things to be, life is good.


Why not? It's a 55 amp converter.
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Old 02-06-2020, 08:16 AM   #9
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I agree - if there is something that needs 12 volts DC to run, it will run with the converter... so as long as the AC power is as reliable as you need those 12 V things to be, life is good.
This could be demonstrated by plugging in to shore power and flipping the disconnect switch to kill the battery power.
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Old 02-06-2020, 08:56 AM   #10
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I always thought if you have solar you need to have batteries connected. without solar, see above.....
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Old 02-06-2020, 09:10 AM   #11
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Are there any issues with leaving trailer plugged in to shore power 24/7 with out the battery in the trailer? Thank you.
I would think that this is ok. The only worry I would have is that the wires to the battery would be live since the converter is trying to charge them. I would flip the battery disconnect so that there is no juice going to the battery leads.
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Old 02-18-2020, 04:57 PM   #12
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It's probably good to have a battery in there, even if it's a small car battery or something. The converter design assumes that a battery will be there as a "buffer" to stabilize voltage. There might be enough capacitors in the converter and various devices to do the job, but it's a bit harder on the electronics. Hard to say if it's enough to matter, though clearly it's fine in the short term.
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