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Old 05-16-2018, 10:18 AM   #1
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Fridge on 12 Volt, How Long Will It Work?

I have a 2012 184BH, it has a new to me 3 way fridge with a dial to select shore power, 12 volt, or propane. My trucks trailer plug will charge the battery when running or draw off the trucks battery when turned off. I guess I'm wondering how well these work on 12 volt and how long they will run? I mainly travel in my camper and drive all day and stop overnight like at a walmart and hit the road again the next day. I figured it'd be a power hog. I just wondered what all you guys do. Thanks in advance.
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Old 05-16-2018, 10:39 AM   #2
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I have a 2012 184BH, it has a new to me 3 way fridge with a dial to select shore power, 12 volt, or propane. My trucks trailer plug will charge the battery when running or draw off the trucks battery when turned off. I guess I'm wondering how well these work on 12 volt and how long they will run? I mainly travel in my camper and drive all day and stop overnight like at a walmart and hit the road again the next day. I figured it'd be a power hog. I just wondered what all you guys do. Thanks in advance.
Mainly dry camp leave propane on all the time.Only remember the low DC light coming on once.We have the model 1210 Frig, what has helped was adding interior 12V fan to circulate cold air. Thanks
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Old 05-16-2018, 06:07 PM   #3
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We run ours on propane when moving. Uses very little propane and very little 12v.
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Old 05-16-2018, 07:17 PM   #4
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I wouldn't think it would run on just 12V for very long. Propane is a better idea.
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Old 05-16-2018, 07:35 PM   #5
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As the 12 volt is like the 120 AC current, they both are heating an element. Your batteries will not last long with the fridge on 12 volt. A trailer we owned in the 1980s had a 3-way fridge. I tried using it on the 12 volt and after towing for three hours, the trailer battery was almost dead.

The dealer said the fridge sucked more power than the TV could provide. Not sure if that was true.

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Old 05-17-2018, 08:54 AM   #6
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Jayco's power usage chart claims TV 2-4 amps,TV boaster always on 1 amp, Frig 3 amps. Thanks
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Old 05-19-2018, 09:39 AM   #7
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But that 3 amps is when a fridge is on propane and using DC to power the board that controls the fridge.

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Jayco's power usage chart claims TV 2-4 amps,TV boaster always on 1 amp, Frig 3 amps. Thanks
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Old 05-19-2018, 09:47 AM   #8
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They are power hogs when on DC. I previously had Class B rv's. They all had 3 or 4 cf 3-way refrigerators. DC power is very inefficient way to cool a fridge. 1 to 2 hours will cook a battery. When I had the Class B's, I'd put the fridge on DC while we were driving. It was enough to maintain the temp. Once I stopped, I'd switch to either propane or AC depending what was available.

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Originally Posted by silverta16 View Post
I have a 2012 184BH, it has a new to me 3 way fridge with a dial to select shore power, 12 volt, or propane. My trucks trailer plug will charge the battery when running or draw off the trucks battery when turned off. I guess I'm wondering how well these work on 12 volt and how long they will run? I mainly travel in my camper and drive all day and stop overnight like at a walmart and hit the road again the next day. I figured it'd be a power hog. I just wondered what all you guys do. Thanks in advance.
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Old 05-19-2018, 11:15 AM   #9
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Originally Posted by silverta16 View Post
I have a 2012 184BH, it has a new to me 3 way fridge with a dial to select shore power, 12 volt, or propane. My trucks trailer plug will charge the battery when running or draw off the trucks battery when turned off. I guess I'm wondering how well these work on 12 volt and how long they will run? I mainly travel in my camper and drive all day and stop overnight like at a walmart and hit the road again the next day. I figured it'd be a power hog. I just wondered what all you guys do. Thanks in advance.

Why wouldn't you run it on propane??
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Old 05-19-2018, 11:58 AM   #10
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Last three way fridge I had could be powered by the truck when we were towing, but the trailer battery won't power the fridge overnight. Also, on 12v it would "maintain" a cold temp, but couldn't cool the fridge.
Best bet, use 120 or propane when stopped, switch to 12v when towing. Too many people will tell you to just go ahead and use propane while towing, but it's illegal in places, and always dangerous.
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