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 > Refrigerator on D.C. When traveling?

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palmwhit

Arizona

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Posted: 06/03/18 02:08pm Link  |  Quote  |  Print  |  Notify Moderator

I've run refer on propane when underway since taking delivery of our 2006 Lance in late 2005. We burn diesel so that's an advantage on explosive fumes danger at pumps, but doesn't protect you from the gasser on the other side of the pump. To be safe, just turn the refer off prior to reaching pumps and back on after clearing.
Never had the flame blow out when moving in all those years either. Individual designs might not offer same wind protection however.

pianotuna

Regina, SK, Canada

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Posted: 06/03/18 04:13pm Link  |  Quote  |  Print  |  Notify Moderator

Hi,

The problem is voltage drop on the 12 volt side. My 12 volt setting works well--if I'm plugged into shore power when the voltage is 13.2, and draws about 34 amps. That works out to over 400 watts. I discovered this by accident on a trip in 2009, so I don't have a lot of data about it.

But at 12.7 volts, the fridge just doesn't keep up with the wattage needed to keep running well.

Part of the reason is the makers only use #12 wire for the DC supply to the fridge. #10 or #8 would work much better.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp hours of AGM in two battery banks 12 volt batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

Dennis12

Ridgeley WV

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Posted: 06/03/18 05:04pm Link  |  Quote  |  Print  |  Notify Moderator

Use your propane!


Dennis Hoppert

Pawz4me

North Carolina

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Posted: 06/03/18 05:24pm Link  |  Quote  |  Print  |  Notify Moderator

Our current fridge runs fine on 12v. We keep a thermometer in it and it has no problem maintaining a good temperature. In our former RV we traveled for ten years running the fridge on propane w/o a problem.


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time2roll

Southern California

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Posted: 06/03/18 06:24pm Link  |  Quote  |  Print  |  Notify Moderator

Saint Augustine wrote:

I know not to use propane when moving. Comments.
Why not? Thousands of RVs do it every day.


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PSW

Oklahoma City

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Posted: 06/03/18 06:52pm Link  |  Quote  |  Print  |  Notify Moderator

Our Roadtrek does fine going down the road on 12v. We have a little wireless indoor/outdoor thermometer mounted on the dash and just observe it as we travel. Now, that assumes the refrig was cold to begin with when we turned it to 12v. As soon as we stop for more than an hour or so, we shift back to propane and I have no concern whatsoever of going down the road on propane. On a really hot day, say over 100F, we go with propane.

Our three Class Cs we have owned over the years were all two way (110v or propane) so we always traveled on propane. As others have said TURN IT OFF before you get near a refueling pump. That's the reason we prefer to drive with 12v -- so we don't have to shut off the refrig when we refuel.

People have an inordinate fear of propane. In the area where we live, a lot fleets run on CNG (compressed natural gas) and it compressed to about 3000 psi in its tank. I have never heard of a CNG or LP (aka propane) problem around here and the CNG has been used by some local fleets for a couple of decades.

Paul


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and a 2007 Roadtrek 210P for touring

GordonThree

Northern Michigan

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Posted: 06/03/18 06:52pm Link  |  Quote  |  Print  |  Notify Moderator

Turn off BEFORE you pull into the gas station for fueling.

How do the safety Sam's know someone hasn't already spilled gasoline everywhere? Turning off after pulling into the pump could be too late.


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steveh27

Grosse Pointe Woods, MI

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Posted: 06/04/18 06:04am Link  |  Quote  |  Print  |  Notify Moderator

My 1997 Class B has a Dometic 3 way. I always use 12 volt when traveling. Mine does not work on 12 volt unless the engine is on. It keeps it cold enough.

pianotuna

Regina, SK, Canada

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Posted: 06/04/18 08:20am Link  |  Quote  |  Print  |  Notify Moderator

Another good plan is to make sure the drain hose has a "trap" so that outside air does not flow into the refrigerated space. Of course, if there are temperatures well below freezing you don't want that dip to freeze up. I routinely forget to recreate the trap until I start having cooling issues.

KD4UPL

Swoope, VA

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Posted: 06/04/18 09:45am Link  |  Quote  |  Print  |  Notify Moderator

Saint Augustine wrote:

I know not to use propane when moving. Comments.

Based on what? I can guarantee you there's nothing in the owners manual that says that. RV refrigerators are designed to use propane when in motion. Thousands of people, my self included, do it all the time.
Use the propane when traveling. That's what it's there for.

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