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08-21-2019, 07:07 PM
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#1
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Junior Member
Join Date: Apr 2018
Posts: 16
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Running the roof A/C while driving.
We generally turn on the inverter while traveling so we can keep the refrig nice and cool and have the 120V recepticles working. We live in Florida and sometimes the RV heats up with just the dashboard AC running.
I've checked out other posts on running the generator while traveling and running one of the two roof ACs. My question is if I have the inverter on while traveling and I decide to start the gen and run a roof RC then where will the power be coming from? Will the inverter support the generator or the RV engine? Just looking for a way to keep the refrigerator and a roof AC unit running.
Thanks in advance for any input.
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Jack & Sue
2018 Fleetwood Bounder 35K
2013 Jeep Patriot TOAD
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08-21-2019, 07:13 PM
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#2
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Senior Member
Monaco Owners Club
Join Date: Oct 2014
Location: Rigby, Idaho
Posts: 3,946
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Shut off the inverter and run everything on the generator. Running the generator to power the inverter is as redundant as a urinal in a shower. I mean, what's the point.
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Cheers,
TonyMac
2006 Monaco Safari Cheetah 40PMT
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08-21-2019, 07:14 PM
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#3
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Junior Member
Tiffin Owners Club
Join Date: Jan 2019
Location: Everett, Washington
Posts: 24
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When you run your generator it will power the refrigerator and the roof top ac. You would only need to use the inverter when the generator is not running. This is what I do.
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08-21-2019, 07:17 PM
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#4
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Senior Member
National RV Owners Club Freightliner Owners Club
Join Date: Jul 2015
Location: Conch Republic
Posts: 2,534
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I would have to know what your inverter is but with the Zantax I have and every other I have used the system would sense the Generator coming on and make the generator supply everything including charging the batteries. This is called "pass through" I think. It is seamless and when you turn off the generator it should go back to inverting and the AC will stop.
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33' 2008 National Tropical on a Freightliner chassis.We tow a 2001 XJ (Cherokee) RVM#189
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08-21-2019, 07:39 PM
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#5
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Senior Member
Join Date: Aug 2016
Posts: 3,400
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Don't run the inverter while underway. Just run the genset and it will power everything you need. And be sure to turn it off when refueling.
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08-21-2019, 08:13 PM
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#6
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Senior Member
Join Date: Apr 2015
Location: Rogers, AR
Posts: 2,623
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It depends on your inverter. If It automatically goes to “pass through” when it senses 120V, generator or power post plug in, you don’t have to do anything, just start the generator and go. If it doesn’t have this automatic feature, I would shut off the inverter while the generator is running.
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2019 Fleetwood Discovery LXE 40M w/2021 Equinox
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08-21-2019, 08:28 PM
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#7
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Senior Member
Ford Super Duty Owner
Join Date: Jan 2019
Location: Anchorage, Alaska
Posts: 637
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Just a few weeks ago we drove through AZ and while approaching PHX the temp was 115. Our dash A/C wasn't keeping up very well and the cat started panting, so we lit up the generator, started the roof A/C, and pressed on down the road. While that didn't actually "cool" the interior, it made it bearable, and the cat appreciated it too.
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08-21-2019, 08:31 PM
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#8
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Senior Member
Join Date: Jun 2014
Location: Gulf Coast, Alabama
Posts: 2,450
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Quote:
Originally Posted by alank
It depends on your inverter. If It automatically goes to “pass through” when it senses 120V, generator or power post plug in, you don’t have to do anything, just start the generator and go. If it doesn’t have this automatic feature, I would shut off the inverter while the generator is running.
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Since many wouldn't know whether they have a common one (that automatically selects what power source is to be used in descending order), I think that any Manually Selecting panel would have to have a warning or light or something to instruct users when to throw what switch.
I am no expert, but doubt that a manually-selected panel is even out there, much less condoned by the Feds or otherwise.
We fire up the genset when temps get too warm, and that process automatically turns off the inverter or propane because 120V is the default source of power, whether from a gen-set or shore power.
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Rick and Sandy
2003 American Eagle, 59K miles
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08-21-2019, 08:48 PM
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#9
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Senior Member
Join Date: Apr 2018
Location: Shingle Springs Ca.
Posts: 334
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We have never run the gen. for air con. in hot weather, but have given lots of thought to making some sot of curtain or barrier behind the front seats to contain the dash air to that area. has anybody done something like that?
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Dee & Dale & 2 four legged kids
2013 Canyon Star 3856/ Jeep Liberty following
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08-21-2019, 09:06 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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if its over 75F
i run the genny and both a/c units and the dash air. I like to be chilly
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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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08-21-2019, 09:14 PM
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#11
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Registered User
Join Date: Sep 2016
Posts: 1,209
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Start up the Genny and run both rooftop ac and the dash ac. Forget about the inverter. It don't matter.
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08-21-2019, 09:17 PM
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#12
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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I haven't done it yet but on some of the higher end CC's they installed an air con unit under the bed that runs off the dash air compressor. If I needed to I can turn on both of those as well as run the gen for the three 15k heat pumps. Have never been anywhere O needed that much cooling.
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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08-21-2019, 09:45 PM
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#13
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Member
Join Date: Nov 2017
Posts: 45
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Quote:
Originally Posted by old golfer guy
We have never run the gen. for air con. in hot weather, but have given lots of thought to making some sot of curtain or barrier behind the front seats to contain the dash air to that area. has anybody done something like that?
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Yes - We do that. We use it in hot as well as cold weather. It keeps the air in the cab area instead of having the dash air try to cool/heat the entire coach. It works well for us.
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J & M
05 TS Envoy 38DS04 CAT C7, 350 HP
2017 Jeep Cherokee TrailHawk - Ready Brake Tow
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08-21-2019, 10:33 PM
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#14
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Senior Member
Join Date: Aug 2017
Posts: 698
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Quote:
Originally Posted by old golfer guy
We have never run the gen. for air con....
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One question...why?
The generator is there precisely so you CAN run the AC while driving or boondocking. When we run in hot weather, the generator, both roof air conditioners and the dash air are running.
It’s a motor HOME, and I sure don’t keep my sticks & bricks home at 85 degrees in the summer.
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