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02-06-2012, 10:30 AM
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#1
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Senior Member
Join Date: Feb 2011
Location: Michigan
Posts: 1,045
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propane vs electricity cost to run fridge
Is there any savings by running the fridge on propane vs electricity at a full hook-up campground.. when then are charging $40 -60 dollars a month for electric ??
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02-06-2012, 10:39 AM
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#2
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Senior Member
Join Date: Aug 2010
Posts: 855
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Probably. But it really depends on your costs. Filling a propane tank can cost 25 dollars. But you could run a refer for maybe two/three months on that propane. But the electric element will run the refer without the need for going out to find gas. Leave the refer on auto and it will choose the most economical mode of operation.
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02-06-2012, 10:44 AM
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#3
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Senior Member
Join Date: Feb 2011
Location: Michigan
Posts: 1,045
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we have a 25% discount on propane here.. a 30 lb refill should be around $20- $22
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02-06-2012, 11:51 AM
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#4
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Senior Member
Join Date: Sep 2009
Location: Maple Ridge, BC, Canada
Posts: 640
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Quote:
Originally Posted by donn
Probably. But it really depends on your costs. Filling a propane tank can cost 25 dollars. But you could run a refer for maybe two/three months on that propane. But the electric element will run the refer without the need for going out to find gas. Leave the refer on auto and it will choose the most economical mode of operation.
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Wonder how it does that ??????
...VTX-AL
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02-06-2012, 11:56 AM
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#5
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Senior Member
Join Date: Aug 2011
Posts: 101
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You might consider calculating the kilowatts per hour of usage with electricity first. You'll probably need an ammeter to do this.
Next, determine the approximate number of hours your equipment runs, and calculate the KW usage during this time.
Do the same for your other RV needs excluding that in question.
Find the cost per KW charged at the park or supplier, and calculate your maximum usage with both variables, subtract out the difference.
As stated before, other costs are incurred which include your time, expense to get the gas, the propane cost, servicing your rig, etc. For these costs, are you willing to go to all of this work? That's a question only you can answer, and only you can assess this by working out the solution mathematically.
Too many variables exist—heating degree days, temp you like to run at, distances to and from the supplier, your abilities, etc.
Just a thought.
Mike
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02-06-2012, 12:37 PM
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#6
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Junior Member
Join Date: Jan 2012
Posts: 14
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All things being equal you can simply remove all the variables as the question is, which is more economical.
Let's assume you have a 325 watt electric element in the refrigerator. We can also assume you run the element for x amount of hours. I'll use 10-hours to make it easy. In this 10-hour day of operating you would consume 3250-watt hours or 3.25 kilowatt-hours. Here on the East Coast the average cost after all deliverables is $0.14 per kWh. So the fridge would cost $0.46 to operate that day. Before all you efficiency nuts jump in, the electric element is essentially 100% efficient and the losses to ambient for the element can be the same ambient losses with the propane so all we can use a factor of 1.0 for the ambient loss comparison.
Now converting the 325 watt element to btu/hr would be a total of 1,109 btu/hr for the same amount of heat. Use the 10 hrs and you consumed 11,090 btu's in that same day on propane. Propane contains approx. 21,590 btu's in every lb. Also, because of the flue gases we can apply an efficiency loss of approx. 10% according to some data I looked up on small propane appliances. So now the 11,090 btus / .90 = 12,322 btu's used that day. Divided by the 21,590 btu's in a lb would equal 0.57 lbs of propane used in the same scenario as the electric element. Again, using pricing in my area we are paying approx. $0.83 per lb. Total cost of propane for that day would be $0.47
So, you can see the prices are very similar and a careful calculation would be made to the prices paid for electric and propane.
Personally, Keep the beer cold no matter the cost. We always use propane when travelling, and switch to electric if at a CG with hook-ups, because we pay for the electric with the camping rate. The same applies to the HW heater as well.
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02-06-2012, 01:45 PM
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#7
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Senior Member
Join Date: Aug 2011
Posts: 101
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Not to be argumentative, but variables actually have an impact in the equation. The reason is the question posed initially wherein the cost was 40 to 60 per month. Not stated was whether the electric cost is a set figure (per month). Therefore, the question may not be as simple as which costs more, gas or electric.
When considering the amount charged per month as a set figure we must allocate our resources accordingly. Paying 40 – 60 per month may be over actual the usage.
A like example is in a cell telephone use where another call under the maximum minutes has no impact on the charges, and purchasing a calling card only adds to the total cost.
Therefore burning propane while under-running the electrical costs is a net loss—if the park charges a set amount.
Sometimes two ways of approach yield two different results.
Ciao,
Mike
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02-06-2012, 08:40 PM
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#8
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Senior Member
Join Date: Sep 2009
Posts: 755
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Quote:
Originally Posted by donn
Leave the refer on auto and it will choose the most economical mode of operation.
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That's not my understanding, I understand that with the switch on auto it will run on electric whenever available, then switch to gas when there is no electrical hookup.
If not, my propane would be empty all the time because I leave it on auto and run it all the time plugged in while at home.
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02-06-2012, 09:22 PM
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#9
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Senior Member
Join Date: Jul 2010
Posts: 2,031
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Are you being charged for electricity if you use it or not? If the CG is going to charge you 40 to 60 dollars for electricity then you will not save anything by go to propane.
__________________
Terry and Janet
2008 3001W Windjammer
2007 Ford F150
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02-06-2012, 09:51 PM
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#10
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2000 Cardinal 5th Wheel
Join Date: Jul 2011
Location: Traverse City
Posts: 21
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Quote:
Originally Posted by flyrotor
That's not my understanding, I understand that with the switch on auto it will run on electric whenever available, then switch to gas when there is no electrical hookup.
If not, my propane would be empty all the time because I leave it on auto and run it all the time plugged in while at home.
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Yes, your understanding is correct....the Person who said it chooses the most efficient ......is.....well, misinformed.
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02-07-2012, 08:43 AM
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#11
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Senior Member
Join Date: Feb 2011
Location: Michigan
Posts: 1,045
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Quote:
Originally Posted by caper
Are you being charged for electricity if you use it or not? If the CG is going to charge you 40 to 60 dollars for electricity then you will not save anything by go to propane.
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The average "bill" For electric is anywhere from $30-$60 dollars per month ...there are meters at each camp site...
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02-07-2012, 11:46 AM
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#12
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Senior Member
Join Date: Jun 2011
Location: Jamestown NY
Posts: 588
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another issue might be, with all the refer fires there seems to be with refers on propane, I'd think the issue would be elect vs propane/fire.
__________________
2012 Winnebago "Journey To Insanity" 40U
2008 Dakota Sport 4x4
2004 Subaru Baja - DW's
2006 Honda Shadow Aero - TOAD for now.
F.R.O.G. member
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02-07-2012, 03:48 PM
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#13
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Senior Member
Join Date: Dec 2011
Location: Louisiana
Posts: 273
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Quote:
Originally Posted by flyrotor
...I understand that with the switch on auto it will run on electric whenever available, then switch to gas when there is no electrical hookup.
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X3
__________________
2012 Rockwood 8314BSS
2011 Chevy
Camping, Dutch Oven Cooking, and Homebrewing
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02-08-2012, 09:08 AM
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#14
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Senior Member
Join Date: Feb 2011
Location: Michigan
Posts: 1,045
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Quote:
Originally Posted by campdohbrew
X3
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X4...But... does any one really know, if .....its cheaper to run a fridge on propane ...or..electricity ??
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02-08-2012, 01:22 PM
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#15
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Senior Member
Join Date: Jul 2010
Posts: 2,031
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It all depends on the cost of hydro. If you are paying less then 15 cent /kwh then it would be better to run the reefer on hydro.
__________________
Terry and Janet
2008 3001W Windjammer
2007 Ford F150
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