1500 watt pure sine wave inverter - Fiberglass RV


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Old 06-09-2013, 01:36 PM   #1
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1500 watt pure sine wave inverter

as some of you know lil snoozy is all electric , 110 fridge this is what I have done so far . replaced the charger with a 35 amp converter , changed to a 7 pin plug so the converter will charge the battery on the go , I have a 1500 watt pure sine wave inverter so I can run the fridge, on the go can it be hooked to the batteries' on its cables converter is on its on cables . and charges as we go .?
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Old 06-09-2013, 01:59 PM   #2
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If I understand correctly, you want to run your 110 volt refrigerator from your trailer battery using an true sine inverter (mounted in the trailer) and have the tow vehicle provide enough charging current to keep the trailer battery from discharging while driving.

If this is correct, I think that the answer is yes, provided that you have heavy enough cables from the tow vehicle battery all the way to the trailer battery. Likely this would be 6 or 4 gauge copper wire. Do you know how many amps the refrigerator pulls on 110 volts while running and about how far the tow battery is from the trailer battery?

An alternative solution would be to mount the inverter next to the tow battery and run a 110 volt cord to the trailer to power both the refrigerator and the converter.
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Old 06-09-2013, 02:19 PM   #3
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Tom I have looked in the manual and in the fridge to fine the amps to no avail ,I am using 6 g cable . when I am not towing the shore power will charge the bat with the converter and the inverter is turned off ?
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Old 06-09-2013, 03:11 PM   #4
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Tom I have looked in the manual and in the fridge to fine the amps to no avail ,
If you post the brand and model we can find it on the internet.

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I am using 6 g cable .
That's a great start. Is it 6 gauge all the way back to the trailer battery?

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when I am not towing the shore power will charge the bat with the converter and the inverter is turned off ?
Yes, it will. I think that your only issue is running the fridge while driving.
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Old 06-09-2013, 03:33 PM   #5
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it is a magic chef mod #mcbr360s
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Old 06-09-2013, 03:49 PM   #6
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it is a magic chef mod #mcbr360s
Here is the manual. http://mcappliance.com/document/MCBR360W.pdf

It says not designed to be run with an inverter, though with a true / pure sine inverter, you are probably OK.

Quote:
This unit is not designed to be installed in an RV or used with an
inverter.
I can't find the amperage draw, even in the manual. Since you already have the 6 gauge wiring, I'd say try it. If you can measure the current flow from the trailer battery, it will tell you if the tow charge is keeping up or if you are drawing down the trailer battery.
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Old 06-10-2013, 07:33 AM   #7
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Home Depot Magic Chef 3.6 cu. ft. Mini Refrigerator in White-DISCONTINUED: questions, answers, how to, FAQs, tips, advice, answers, buying guide
Magic Chef is alleged to report 1.2v at 120v. That would be 144 watts. Given a typical inverter efficiency of 90%, that would be 160 watts which would be 13.3 amps at 12vdc. My Dometic requires about 10amps at 12vdc and my tow pretty much keeps up. I expect 13 amps would be doable.

I wonder if the "not in an RV" comment in the manual is as much about shaking apart as current quality.
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Old 06-10-2013, 08:48 AM   #8
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I wonder if the "not in an RV" comment in the manual is as much about shaking apart as current quality.[/QUOTE]


It may not be shaking apart. The refrig would have been trucked, trailered, and handled over and over ever since it left the factory.
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Old 06-10-2013, 08:57 AM   #9
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I wonder if the "not in an RV" comment in the manual is as much about shaking apart as current quality.

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It may not be shaking apart. The refrig would have been trucked, trailered, and handled over and over ever since it left the factory.
Some of these small AC refrigerators dissipate heat through the side walls as opposed to a coil on the back, making them harder to properly ventilate. This also makes them less efficient.
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Old 06-10-2013, 02:07 PM   #10
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It may not be shaking apart. The refrig would have been trucked, trailered, and handled over and over ever since it left the factory.
True enough, although packed from the factory is quite different than installed in the trailer. And I can see trapped heat taking it's toll as well.

Anyhow, just a thought. I know that RV rated carbon monoxide and gas sensors are allegedly "ruggedized" so I was thinking out loud, so to speak.
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