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Old 03-31-2015, 11:28 AM   #1
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Question Refrigerator on battery

I have a Sierra 377FLIK with a house hold refrigerator,and a 1000 watt inverter just for the refrigerator. How long can I expect the battery to last while towing? This is the first non-propane refrigerator I have had.
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Old 03-31-2015, 01:23 PM   #2
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I don't know the tow set up in the F350, but on the F150 with the tow package I have a relay (located in my glovebox in a baggie, guess Ford doesn't install them) that I installed in the fuse compartment. When towing my 5th wheel the truck charges the house battery.

As for how long the battery will last running the refrigerator, I couldn't say. I had mine on the house battery for about 6 hours and it wasn't dead.
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Old 04-05-2015, 08:12 PM   #3
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I am almost ready to pull the trigger on a 377flik with the residential fridge and inverter but I don't completely understand how this works. since you have one can you explain about how the inverter set up kicks in? I don't need an explanation on what an inverter is or anything, just wondering if this is 'on' all the time or if it can be cut off. Also, do these have just one 12v batt or does this inverter set up have a bigger battery bank? I assume this will kill the truck batt if one was to park overnight and not disconnect the 7-pin to the truck (my ram 12v i live all the time on the trailer plug). Any explanation of the workings on this would be appreciated.
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Old 04-05-2015, 08:54 PM   #4
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I have no idea also about the inverter etc. But in the F150 forums that I found this answer to, the RV battery only charges when the truck is running, when the power is off, the RV battery is not being charged by the alternator, thus it is running off the RV battery.


Sorry for jumping in, I dont have a 377flik, I was just chiming in on the charging that the 2014 F150 does. (my model F150)
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Old 04-06-2015, 06:43 AM   #5
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There is a switch to change from the inverter to normal power when on shore power or you can run it of the inverter all the time it is you choice. As to the running down of your battery most trucks stop sending power to the trailer when the key is off or at the most after 20 min, just like your radio will go off after about 20 min.
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Old 04-06-2015, 06:59 AM   #6
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Quote:
Originally Posted by stevewise View Post
I have a Sierra 377FLIK with a house hold refrigerator,and a 1000 watt inverter just for the refrigerator. How long can I expect the battery to last while towing? This is the first non-propane refrigerator I have had.
Well it will depend on how often you open the doors and let the cold air out. If you get down to temp and it stays closed you shouldn't pull that much power. If you open and close it, like at every stop you make your going to use a lot more 12 volt power for that inverter. If I had a residential refer, I would put in a second battery. If you boondock a lot go with 6 volt if you stayed plugged in mostly go with 12 volt. Remember that if a 12 volt go's out you still have one. If a 6 volt go's out you have nothing.
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Old 04-07-2015, 08:09 AM   #7
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I recently bought a used RV and the condition of the batteries were completely unknown. While I was home, I ran things off a fully charged battery to see how long they would really last. A DC voltmeter will give you a good idea of what is left in the battery while you're conducting the test. I have installed a volt/amp meter permanently and now after a couple weekends out (connections are not available for us), I feel like I now know my batteries and I can judge how long they will run things.

You could also use math, but there is nothing like a real world test IMO.
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Old 04-07-2015, 08:34 AM   #8
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I think you will find you need a lot more battery bank than the one it came with to supply your inverter to run a residential refer very long. Probably some solar also to help keep those batteries charged during the day while boon docking unless you will be hooking up to shore power. JMO
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Old 04-07-2015, 11:11 AM   #9
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Some trucks send power to the trailer only when running (like my 2011 F350) but others send power to the trailer whenever they are connected. Some trucks, perhaps most, have a simple way to change the way they deliver power to the trailer by moving a wire so you can pick the way you like. I prefer power only when the truck is running so I don't have to worry about unplugging the trailer when the vehicle is turned off for an extended amount of time.
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Old 04-07-2015, 04:37 PM   #10
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...Some trucks, perhaps most, have a simple way to change the way they deliver power to the trailer by moving a wire so you can pick the way you like.
Where might I find that?



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