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04-14-2010, 10:01 AM
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#1
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Member
Join Date: Mar 2008
Posts: 62
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Running with Inverter
this may be a weak question, but when you are driving on the road, should I be running with the inverter switched on to run the frig, or inverter off, and run the frig on gas?
Thanks, Jcwhitty
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04-14-2010, 10:32 AM
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#2
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Moderator Emeritus
Join Date: Oct 2002
Location: Sheboygan, WI
Posts: 5,642
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Most coaches equipped with non-residential fridges do not have the fridge's electric element wired through the inverter. It generally takes too much power when boondocking. Our last coach had a Norcold 1200 fridge and we ran it on propane when driving or boondocking. However, the ioce maker generally is plugged into a separate outlet that is controlled by the inverter. That way you can make ice while driving or boondocking, as long as the water pump is switched on.
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Mark & Leann Quasius
2016 Cornerstone 45A
2020 Jeep Gladiator Rubicon
2021 Jeep Wrangler Rubicon
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04-14-2010, 10:42 AM
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#3
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Member
Join Date: Mar 2008
Posts: 62
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Thanks Mark...I believe our frig is wired through the inverter, but I will make sure. To save propane, I thought it would be better to run the frig on the inverter when on the road since the alternator is supplying power, but was concerned maybe the excessive use could be harmful to the inverter. It is a Norcold two door frig, two door freezer with ice maker in a 2003 Itasca Horizon motorhome.
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04-14-2010, 10:44 AM
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#4
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Member
Join Date: Mar 2008
Posts: 62
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When I switch on the inverter, the frig swithches from LP to AC. Must be wired through the inverter
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04-14-2010, 10:58 AM
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#5
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Moderator Emeritus
Join Date: Oct 2002
Location: Sheboygan, WI
Posts: 5,642
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You won't harm the inverter, if that's the way it is wired. You just have make sure to take it off the "auto" mode when boondocking, dry camping, or parked overnight without shore power to prevent the batteries from running down.
My present coach has a residential fridge and a 3,000 watt inverter and it runs when driving or dry camping. However, I have lots of batteries plus it's a residential fridge which consumes much less power than my previous Notsocold. But it won't harm your inverter any.
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Mark & Leann Quasius
2016 Cornerstone 45A
2020 Jeep Gladiator Rubicon
2021 Jeep Wrangler Rubicon
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04-14-2010, 11:52 AM
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#6
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Senior Member
Tiffin Owners Club
Join Date: Feb 2010
Posts: 331
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Most RV w/ 110v capability fridges are simply plugged in to a 110v socket like anything else (all of mine have been, and I've had several)-- and whoever built the coach won't bother isolating THAT plug from any others. Also, most fridges give you a choice to use AC or propane.
FWIW, while driving your rig should be charging the batteries that the inverter is using, so... go for it.
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2000 40' Tiffin Allegro Bus \ 2002 Regal 2860 Commodore
1988 53 x 14 Skipperliner \ 1995 32' Party Cruiser
1984 Goldwing Aspencade \ 1976 Harley Sportster
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04-14-2010, 11:55 AM
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#7
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Senior Member
Forest River Owners Club
Join Date: Aug 2002
Location: ...East Texas
Posts: 5,325
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jcwhitty ...what make/model is your RV?
We often run our 4-door Norcold off the inverter while driving, but when we stop for lunch or any other reason for more than a few minutes, I make sure to switch the refrigerator to LP as our 4-door will bring the battery indicators into the yellow or orange warning range pretty fast.
Actually, the refrigerator won't use any noticeable amount of LP. We have run with on Lp quite a bit too. Using LP for refrigerator and hot water, I don't think we would have to refill the 37 gallon LP tank more than once every two-three years (if that) if we didn't use the furnaces. I like to run the refrigerator and water heater on LP at least once a month or so just to be sure no critters have nested in them ...spiders did plug up the water heater burner tube once when we didn't use it on LP for several months.
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Paul (KE5LXU) ...was fulltimin', now parttimin'
2022 Coachmen Leprechaun 319MB
towing 2017 Jeep Grand Cherokee Limited
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04-14-2010, 05:38 PM
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#8
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Senior Member
Newmar Owners Club Solo Rvers Club
Join Date: Mar 2009
Posts: 183
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I started running mine on inverter and almost never use propane anymore. I found that my frig runs a little colder on 110v than it does on LP. I also have the 4 door Norcold and my ext coach will definately have a house frig.
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Tim Heinzen
2013 King Aire
'12 Jeep COD MWF
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04-14-2010, 06:03 PM
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#9
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Registered User
Join Date: Dec 2006
Location: Traveling the lower 48
Posts: 2,450
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If the inverter is an option then I would always keep the fridge running on inverter while driving. The alternator will charge your batteries faster than your fridge can drain them and you will save a bit of propane (the fridge does not use must propane).
When parked for short periods of time (an hour or 3) then I would still leave it on the inverter. If you are going to be parked for an extended period of time without the use of the generator, only then would I switch to propane.
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04-14-2010, 06:38 PM
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#10
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Senior Member
Damon Owners Club Freightliner Owners Club
Join Date: Mar 2006
Location: North East Texas
Posts: 4,946
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Quote:
Originally Posted by roboniko
I started running mine on inverter and almost never use propane anymore. I found that my frig runs a little colder on 110v than it does on LP. I also have the 4 door Norcold and my ext coach will definately have a house frig.
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thats how ours in wired as well, if i leave the inverter on it will run off it, but it will in short order drain the batteries when you shut down the engine
i have on my checklists to switch it over to propane and off we go
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USN Retired, Life time member of the DAV.
Enjoying the 2008 Damon Tuscany 4056, #3998 no your eyes are fine, there are really 6 slides
2022 F150 King Ranch or 2012 Edge toads
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04-15-2010, 07:55 AM
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#11
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Member
Join Date: Mar 2008
Posts: 62
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Thanks all, invereter it shall be.
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04-15-2010, 09:10 AM
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#12
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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Well.. On my rig I can put the fridge on the inverter, or not, depending. (The reason for this is the ice maker needs 120 vac to operate) Normally I let the fridge run on Gas when on the road.. If I power the Ice Makre I force gas mode on the fridge
WHY: Well, running that's about 35 amps load on the alternator
That's a big hunk of it's capacity. So I'd rather not put the load on the multi-hundred dollar alternator which is living in a very hostile enviorment and thus need not be abused.
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Home is where I park it!
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04-15-2010, 08:15 PM
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#13
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Senior Member
Join Date: Oct 2003
Location: Fulltime- On the Road
Posts: 383
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I agree with Wa8yxm. That's a significant and unnecessary load on the engine alternator that costs hundreds of dollars to replace.
That's also why try to use the convertor/invertor with either shore power or generator to charge the coach batteries if they are in deep discharge before starting the engine. That engine alternator will charge the coach batteries really fast at 160++ amps...but also at the risk of over.loading and over heating that very expensive alternator.
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Roadking
2006 Country Coach Inspire. 51946
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