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05-22-2017, 02:50 PM
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#1
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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Propane fridge battery/propane consumption
Hi,
If I run my fridge/freezer the night before a trip on propane how much amps would I expect the fridges board to pull from the batteries and propane to use?
Normally I always use the battery disconnect when I leave but obviously cannot do so if I want to run the fridge.
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2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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05-22-2017, 02:56 PM
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#2
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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It sure does work without a power.
I thought I had a signature setup, will check.
**Looks like I replied to a deleted post***
__________________
2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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05-22-2017, 03:00 PM
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#3
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Senior Member
Thor Owners Club Solo Rvers Club Mid Atlantic Campers Ford Super Duty Owner
Join Date: Sep 2012
Location: Manassas, VA
Posts: 755
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I just traveled 70 miles home from a campground. About an hour and 15 minutes in duration. I ran my Norcold refrigerator on 'auto' mode. The amount of propane used was negligible. However, when I got home and shut off the frig I checked my control panel. The house battery had run all the way down. I ran my generator for about a half hour as I usually do every month but the house battery was then only up by 50%. I had to plug the RV in overnight to bring the house battery back up to 100%. So you probably won't run out of propane cooling off the frig overnight. But you will run your battery down. IMO, if you can, plug your rig in while cooling off the frig before a trip.
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2006 Four Winds Majestic 23A
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05-22-2017, 03:04 PM
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#4
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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Thanks Mike,
I do not have power at my storage. I was dry camping last week and my Trimetric told me I had 86% charge left after using the fridge for about 14 hours and furnace blow motor overnight.
I have two 236mah deep cycle batteries.
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2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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05-22-2017, 03:13 PM
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#5
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Senior Member
Newmar Owners Club
Join Date: Oct 2009
Posts: 10,308
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Without looking the 12vdc power usage of the fridge, I am going to say it is very little, just powering the boards, your furnace on the other hand is a big power hog on your batteries........
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2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer, 2003 Harley-Davidson
FLHR Road King Anniversary
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05-22-2017, 03:25 PM
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#6
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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Yep, the furnace is definitely a big hog.
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2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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05-22-2017, 06:59 PM
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#7
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Senior Member
Join Date: Dec 2010
Posts: 599
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Propane fridge battery/propane consumption
Generally speaking the fridge will burn about a gallon of propane in 5 days and use about 20 amp hr of battery in a day. These figures will vary depending on the ambient temperature and is for constant use after the fridge has cooled down.
__________________
2013 Coach House 261XL QD Banks
SafetyPlus steering, Centramatic, TSTint TPMS, Dish
Sacamento, CA
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05-22-2017, 07:09 PM
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#8
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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Quote:
Originally Posted by coachmanjay
Generally speaking the fridge will burn about a gallon of propane in 5 days and use about 20 amp hr of battery in a day. This figures will vary depending on the ambient temperature and is for constant use after the fridge has cooled down.
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So it really does not cost a lot to run it.
I am just conditioned to turning off the battery disconnect when I leave the coach for more than a few hours.
__________________
2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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05-22-2017, 07:15 PM
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#9
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Senior Member
Join Date: Dec 2010
Posts: 599
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No, the fridge does not use a lot to maintain temp. When you disconnect the batteries you also turn off the smoke and propane detectors and may lose memory in any item that runs on DC
__________________
2013 Coach House 261XL QD Banks
SafetyPlus steering, Centramatic, TSTint TPMS, Dish
Sacamento, CA
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05-22-2017, 07:22 PM
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#10
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Senior Member
Tiffin Owners Club
Join Date: Mar 2015
Location: Southern NM
Posts: 2,514
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Quote:
Originally Posted by mikebreeze
I just traveled 70 miles home from a campground. About an hour and 15 minutes in duration. I ran my Norcold refrigerator on 'auto' mode. The amount of propane used was negligible. However, when I got home and shut off the frig I checked my control panel. The house battery had run all the way down. I ran my generator for about a half hour as I usually do every month but the house battery was then only up by 50%. I had to plug the RV in overnight to bring the house battery back up to 100%. So you probably won't run out of propane cooling off the frig overnight. But you will run your battery down. IMO, if you can, plug your rig in while cooling off the frig before a trip.
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Mike you have something wrong, while traveling, your house batteries should be charged with the chassis alternator, so when you got home your house batteries should be fully charged.
I would check with a volt meter to make sure your alternator is charging your house batteries, should read around 13.5v with the engine running.
As for the OP, you should have NO problem, if your batteries are good, running the fridge overnight.
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2005 Tiffin Allegro Bay 37DB
W22 Workhorse Chassis 8.1 Flat Towing a 82 Jeep CJ7
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05-22-2017, 07:25 PM
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#11
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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I have dry camped a bit with the coach but always start the generator in the morning in to charge the batteries a for a while.
__________________
2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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05-22-2017, 08:01 PM
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#12
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Senior Member
Monaco Owners Club
Join Date: Dec 2007
Location: Hartwell, GA
Posts: 240
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My Norcold 1200 is rated to draw 1.9 Amps. Therefore, in 12 hours, it would use about 23 amps. Whether this is a problem or not depends on your battery capacity. If you only have one group 24 battery (usable capacity of 32 amps), you will nearly exhaust it in 12 hours. When your battery is connected, there are other hidden loads, the largest of which is probably your LP detector.
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2005 Monaco Diplomat 40PDQ
Hartwell, GA
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