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Old 08-29-2016, 02:53 PM   #15
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As far as the ability to cool, they should both be about the same.

The flame from LP or the electric heating element both supply approximately the same amount of heat to the boiler.

As for which is cheaper, if you have electricity available, use it. This will be the cheapest form of heat for the boiler.

The electric heater is cleaner than the LP burner and not as finiky, i.e. LP orifice clean, burner tubes clean, burner clean.

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Old 08-29-2016, 03:09 PM   #16
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We always started two or three days before we left on gas. "Stuff" was taken out and placed in the fridge the day before we left so everything was acclimatized. Only time we used gas was when Wally docking unless the generator was on.

Our fridge seemed to be able to hold the cold so we turned it off while we were travelling. As soon as we stopped for the evening the fridge was turned on and whatever was available was used for fuel. If we were plugged in or using generator it was on electric, if no electric was available it was on gas.

Best thing for the freezer is to be full, for the chest enough space for the cool to circulate.

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Old 08-30-2016, 02:34 PM   #17
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Originally Posted by Clifftall View Post
It's best to cool it down before you get there ( 24 hours ). I would not use propane at a CG if I had electric.
That's what I did when I had a gas/elect refer. Plus you are paying for electric in your site fee.
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Old 08-30-2016, 02:44 PM   #18
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I too have the option of gas or electric. I always use elect when plugged in and I use elect from solar when I'm not. The only time I use lp is when I'm trying to conserve battery power.
MADP, Jeep, Blue Ox, SMI AFO, Solar: 900w/672a, Amish cooling unit, Lifetime: SKP & Days End
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Old 08-30-2016, 03:10 PM   #19
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You can also freeze a few milk jugs full of water in the house freezer, and put them in the RV fridge to help cool it. But, as Waiter 21 said, both gas and electric should work the same. I use electric as I'm always plugged in at home and the fridge is always cold.

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Old 08-30-2016, 04:24 PM   #20
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One more comment ...

Note that none of this applies to residential type refrigerators only the Absorbtion type :-)

1. The electric heat source puts out same heat at same voltage no matter what the altitude is.

2. Output on 120 V is dependent on the shore power voltage, if there is low voltage ( 110 volts ) vs. normal voltage ( 120 volts ) the electric heat source output drops 15 percent, so cool down time on electric and maximum cooling capability drop if shore power voltage is low.

3. Propane burner heat source output is altitude dependent. Output drops about 4% per 1000 feet elevation change. The higher the altitude the less heat the burner produces, reducing the maximum cooling capability.

4. Below about 5,000 feet the maximum cooling capacity on Propane will be more than the maximum cooling capacity on 120 Volts AC.

5. When cooling down or when needing maximum cooling due to refrigerator doors being open and shut a lot or due to using in very hot ambient conditions, maximizing the air flow across the condenser ( the area at the top on the rear side back wall of the refrigerator with all the fins on it ) is critical. Make sure nothing is obstructing the air flow. Better not to have added a wasp screen on the inlet vent, it reduces the air flow. Buying a cheap cat flea collar and putting in the rear side bottom behind the inlet vent will repel and kill wasps and not reduce the air flow. Make sure your top vent has nothing obstructing air flow as well.
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Old 08-31-2016, 07:55 AM   #21
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We use electric all the time (inverter while driving), but the fridge doesn't know the difference. It's only looking for heat!
Joe & Annette

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Old 08-31-2016, 10:13 AM   #22
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My frig does not do well on electric when the a/c is on and only a 20 amp service. so when doing initial cool down and in transit I use gas. Once on 30amp I switch to electric. then gas back home. I can tell you it doesn't use a lot of propane but when on electric it uses none which it better
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Old 09-01-2016, 06:43 AM   #23
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Originally Posted by ga traveler View Post
I went to factory school on the Dometic and Norcold refrigerators. They had cutouts of cooling units that were restricted and had to be replaced. I noticed that the restrictions were right where the electric elements sat. I asked the instructor if this was caused by the heating element getting hot in a much smaller area than the gas flame area. He said the factory approach was both were equal, but he and most of the guys at the factory felt Gas was better and would prolong the life of the cooling coil. I run my refrigerator on gas almost all the time.
This is good information and enough of a reason to keep using propane. It uses so little anyway.
Burns & Diane
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Old 09-01-2016, 06:55 AM   #24
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I leave mine on all the time and keep things like ketchup, mustard, and water bottles in it. I also keep some items in the freezer. I had my last trailer for 10 years and never turned the fridge off. I've had my current trailer for 10 years and only turn it off when I winterize and remove all of the food.

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