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07-17-2016, 09:12 AM
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#1
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Senior Member
Join Date: Feb 2013
Location: Sedona, AZ
Posts: 1,281
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Use of inverter with residential refer
First, I am talking about a dedicated inverter for the refer, not the whole house inverter. I know that the MH uses the most efficient power available. So with the inverter on but also plugged into shore power it will use shore power. Is there any harm in leaving inverter on all the time. For example, in a CG for two weeks and plugged in. Does it do any harm to anything to just leave the inverter on all that time?
Advantages I see are in case of power outage, refer will still run, at least until batteries crap out.
Disadvantages I see are just extra wear and tear on the inverter?
Comments from those smarter than me about all things electrical?
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Shell Bleiweiss
2014 1/2 Thor Challenger 37KT
Sedona, AZ
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07-17-2016, 11:40 AM
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#2
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Senior Member
Join Date: Sep 2012
Posts: 6,836
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FWIW If it is constructed properly when the inverter gets 120 VAC from the supply main it disconnects the Inverter output and connects mains power to the refrigerator. It should also disable the inverter at that point. If it did not it would remain as a load on the 12 VDC system. I cannot speak for your particular inverter but I would expect that to happen and check the specifications for what you have.
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07-17-2016, 11:55 AM
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#3
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Senior Member
Join Date: Jul 2014
Posts: 11,467
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My 1000 watt Xantrex inverter has a 1/2 amp draw while sitting idle. I leave it on all of the time.
When not plugged in, its working and when plugged in, the half an amp is covered by the charger.
I also have a 2000 watt Xantrex. It also draws .5 amps idle. It was switched on for 5 years, while we lived aboard.
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07-17-2016, 12:20 PM
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#4
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Senior Member
Holiday Rambler Owners Club
Join Date: Jun 2011
Posts: 6,072
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Mine has been running almost non stop for 3 years. I did change the thermostatic snap disk to that runs the fans to one that runs at a lower temp. Keeping the temps down in the compartment helps.
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Myron & Deborah
08 HR Endeavor 40 SKQ
2012 Ford Edge Limited FWD 3.5L
Aluminator tow bar, Demco base plate
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07-17-2016, 01:43 PM
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#5
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Senior Member
Join Date: Oct 2012
Location: Indiana
Posts: 2,326
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Three years and I have never turned it off. Just can't think of any reason. Not only will it keep the fridge running in case of a power outage but it will also protect your TV and other electronic devices when ever there is just a momentary blip in power.
If you have you AGS set up you do t have to worry about running the batteries down if there is an extended power outage.
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Paul, Kathy, and Tux the Mini Schnauzer
2014 Tiffin Phaeton 42 LH, 2013 Honda CRV
"When the time comes to look back, make sure you'll like what you see"
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07-17-2016, 05:59 PM
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#6
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Senior Member
Fleetwood Owners Club American Coach Owners Club
Join Date: Mar 2011
Posts: 4,955
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I talked to Magnum, the maker of my inverter. He said on or off, makes no difference. We use ours very seldom, so it stays off until needed.
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2014 American Eagle 45T
DD 500
Pulling a Honda CRV
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07-17-2016, 07:02 PM
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#7
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 12,731
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On all the time. Just let the system decide when it should be enabled and utilized.
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Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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07-17-2016, 08:16 PM
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#8
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Senior Member
Join Date: Sep 2011
Posts: 2,022
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It depends on how the dedicated inverter is wired. In my case the dedicated is connected directly to the batteries and the only thing it powers is the household refrigerator and if I have them aboard, a 17 cu ft freezer in the pickup and a 3 1/2 cu ft freezer in the basement. Since the only coach/dedicated inverter interface is through the DC input, my inverter stays powered all the time, and when on shore power, the Magnum house inverter is charging the batteries and also providing power for my dedicated inverter. Were I to stay in one place for an extended period, I'd shut off my dedicated and plug the reefer into a house 110v outlet. WHen I set it up, I wired both power 110v supplies so I could replug as necessary.
Because my dedicated is always drawing from my house batteries, If I lose shore power I'm already on the house batteries, so my refer and freezers never lose power or experience a surge. We've been running this way for 60,000 miles and have never had any problems with our setup. When we're in boondock mode, we seldom even turn on our house inverter. We've also got 840W of solar on the roof feeding the house batteries, so the load on the batteries is minor whether we run the refer or the refer and freezers. THe reason for the freezers is that we fish Alaska every second summer, and they come down full of shrimp, salmon and halibut.
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Pigman
2013 Tiffin Allegro Bus 43QGP
2011 Chevy Silverado 1500 Toad
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