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04-04-2015, 06:55 AM
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#1
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Montana Fan
Join Date: Mar 2006
Location: Sioux Falls
Posts: 291
M.O.C. #5590
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Inverter
I have seen lots of "inverter" topics, but cannot seem to find an answer. So, in hopes that I am not reinventing a question I will ask. If we replace our refrigerator with a residential model can we use an inverter to power it while driving down the road?
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04-04-2015, 08:08 AM
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#2
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Montana Master
Join Date: Apr 2013
Location: Arroyo City
Posts: 3,110
M.O.C. #13395
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Yes, if you have enough storage battery, or a strong charging system
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04-04-2015, 09:50 AM
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#3
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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The number of batteries and your charging system is what will make the difference. Many, if not most, folks who use an inverter have more than one battery.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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04-04-2015, 10:30 AM
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#4
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Montana Fan
Join Date: Mar 2006
Location: Sioux Falls
Posts: 291
M.O.C. #5590
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We have two 12 volt deep cycle marine/rv. Old ones gave up and I got these before hearing about 6 volt golf cart batteries.
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04-04-2015, 02:38 PM
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#5
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Montana Master
Join Date: Jan 2013
Location: Depends on temps
Posts: 1,648
M.O.C. #13157
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Jim, To convert 12vdc to 120vac it takes a x10 factor. A 4x6vdc golf cart bank will have about 440 amp hours. You never want to discharge a bank below 50%. So you have 220 amp hours to use daily assuming you have the ability to recharge the bank to 100% daily.
Your frig uses 2 amps to run? It is on a 50% duty cycle. So in a 24 hour period it uses 2x12= 24 amps. Now convert that to 12vdc use that is 240 amp hours of battery use.
To run a residential frig, using 2 amps to run on a 50% duty cycle you will need at least 4x6vdc battery bank and have the ability to recharge the battery bank daily.
Your frig, may be different, but this is the basic math you need to use.
Jim
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2012 Ram Laramie 3500 DRW 4x4 3.73 Tow Max Pkg B&W Companion 60 gal RDS aux fuel tank. 2014 Montana 3150RL, 2 A/C's, Leather, 6 Point Jacks, Splendede WD2100XC, Mor/ryde X-Factor, Duravis 250 tires with TST 507RV monitors. 2 x Honda EU2000's
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04-04-2015, 03:09 PM
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#6
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Montana Master
Join Date: Feb 2008
Location: Hillsboro
Posts: 593
M.O.C. #8238
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It has a lot to do with how big the refrigerator you would get is. That aside, an inverter will work, however the amperage input to operate it is significant. You would have to evaluate your truck's charging system capabilities to be able to keep up with demand, as well as the amp hours of your batteries.
One thought, like some with propane do, is to shut it off while traveling. A cold refer should hold it's temps for several hours, if you don't open it.
And, just to clarify the battery thing, having two 6 volt golf cart batteries does NOT give you more amp hours. Your two 12 volt ones wired in parallel have more amp hours than two 6's would, wired in series for 12 volts. The advantage to the "golf cart" batteries are that they are much more able to take repeated deep discharge cycles than the 12 volt ones would, and have a longer life because of that.
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Terry and Patsy
Vietnam Veteran, US Navy
2017 3810
2015 GMC Sierra 4X4 3500 SRW
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04-05-2015, 04:57 AM
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#7
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Montana Fan
Join Date: Aug 2011
Location: Livingston
Posts: 131
M.O.C. #11717
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JIm: The answer to your question is, "Yes!" We do it while driving down the road all the time.
We have a resi refridge powered by a 1000W inverter.
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04-05-2015, 07:41 AM
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#8
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Montana Master
Join Date: Feb 2006
Location: Denver
Posts: 1,049
M.O.C. #5329
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Just to satisfy my curiosity, when did manufacturers stop using propane or three-way refrigerators? A friend has a new SOB, and that's the first one I ever saw.
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04-05-2015, 08:29 AM
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#9
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Montana Master
Join Date: Mar 2012
Location: Redding
Posts: 1,421
M.O.C. #12339
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04-07-2015, 05:29 AM
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#10
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Montana Master
Join Date: Feb 2006
Location: Denver
Posts: 1,049
M.O.C. #5329
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Thanks for the link. It was informative, but I still prefer the RV fridge.
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