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Open Roads Forum  >  Tech Issues

 > how much elect. does your rv refrigerator use?

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oldbeek

lancaster CA

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Posted: 07/24/11 03:58pm Link  |  Print  |  Notify Moderator

I was doing an audit of how much AC each appliance used at my home. I bought a Kill-a-watt meter to do the audit. When I came to my plugged in RV, it used 5kw per day. In So. Calif. that is $.75 per day. Upon further investigation, I found the frig was using over 4kw per day. And the inverter was using the remainder. My 21 cu ft frig in my house uses 2.1 kw and my 14 cu ft freezer uses 1.6kw/ day.


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pianotuna

Regina, SK, Canada

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Posted: 07/24/11 04:10pm Link  |  Print  |  Notify Moderator

Hi,

I've done some testing on my Dometic Fridge. It takes 3.7 kwh to cool it down. It takes 4.8 kwh to run it for 24 hours. The duty cycle is 2/3.

I've added fans and have not had a chance to repeat the tests above with them running.

If you are paying for the electricity it may be cheaper to run on propane. If you are not--then go for it!


Regards, Don
Full Time in a Kustom Koach Class C 28'5", 256 watts Unisolar, 875 amp hours in two battery banks 12 volt batteries, Magnum 3000 watt PSW inverter.

ScottG

Bothell Wa.

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Posted: 07/24/11 04:27pm Link  |  Print  |  Notify Moderator

Here in Wa. state, it costs me $5 a month to keep the fridge on.


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mena661

Southern California

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Posted: 07/24/11 04:32pm Link  |  Print  |  Notify Moderator

Do you live in your RV? I just turn my RV fridge off when I'm at home.


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red31

Bryan

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Posted: 07/24/11 04:50pm Link  |  Print  |  Notify Moderator

One of the smallest Dometic 1.9 cuft compact fridges is rated 115 watt AC.

Golden_HVAC

Fulltime, CA, USA

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Posted: 07/24/11 07:29pm Link  |  Print  |  Notify Moderator

Hi,

I would leave the refrigerator off when not in use. THey are expensive to run it when not getting ready to go camping. Like stated above, 4.8 KW a day is not unusual. Your home electric refrigerator is much more energy efficient.

The problem is that when boondocking, it is nearly impossible to beat the low wattage used by a propane refrigerator on gas. They only use about 50 watts a day when on gas.

If you unplug the inverter for a long time, expect the batteries to go dead in about a week. The propane and carbon monoxide leak detectors use about 1.6 amp hours per hour, and will use up 35 - 40 AH per day, or 220 in a week.

Fred.

Gale Hawkins

Murray, KY

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Posted: 07/24/11 07:54pm Link  |  Print  |  Notify Moderator

A frig with a 325 watt heating element in 24 hours with a 100% duty cycle would use about 7.8 KW.

Yes per Cu. Ft. a RV frig can have an energy cost of about 1200% more than a new home model.

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