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Old 07-16-2012, 01:02 PM   #1
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A/C

Have a gas RV - 2011 with V10 ford engine. What is more economically to use? Dash or generator ?
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Old 07-16-2012, 01:09 PM   #2
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We use both if needed.

I doubt there is much savings using one instead of the other.

Jon
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Old 07-16-2012, 01:57 PM   #3
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Quote:
Originally Posted by Sightseer33 View Post
Have a gas RV - 2011 with V10 ford engine. What is more economically to use? Dash or generator ?

1. Use the gennie first as it was made to run-uses approx .6 gph plus gives it the much required monthly exercise resulting in less problems and longivity. Also will enable running the fridge or other electrical items as needed.
2. Use the dash ac second to supplement the roof air if needed and leave the power demands to primarily pushing the rv down the road.
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Old 07-16-2012, 02:42 PM   #4
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Thanks. Running both until unit cools then turn off dash air
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Old 07-16-2012, 03:45 PM   #5
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What size generator? That MIGHT have an effect on the amount of gas consumed.
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Old 07-16-2012, 04:41 PM   #6
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Old 07-16-2012, 09:24 PM   #7
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Thanks. Running both until unit cools then turn off dash air
I believe you have arrived at a sensible conclusion.
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Old 07-17-2012, 09:04 AM   #8
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Sightseer33,

You have asked kind of an open question.
If you are underway, do whatever you have to do.

If you are standing still, running the main engine for the AC is not a good idea for a whole lot of reasons.

If you are underway and running the APU for the AC, you are putting hours on the APU and burning fuel that you would not burn if you ran the cab AC. But, if the cab AC just won't do it, go for the whole show.

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Old 07-17-2012, 11:34 AM   #9
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I often hear how it is "Cheaper to use the Generator and the roof A/C"

I also do not believe it, But that is more feeling than anything I can prove.. But consider this.

When you engage the engine driven air compressor, it does suck a bit more fuel out of the tank, but 100% of teh horse power that it uses is used to compress gas .

When you run the gnerator only PART of the enegery the engine generates becomes electricity, I forget the precise percentage, but Thomas Edison optimized the design back when and not much improvement has been made since.

This power runs through wires (Loss) to a motor which like the generator is less than 100$ and that compresses the gas.

Losses every inch of the way up to this point.

NOW: the losses continue, but are the same in both systems so they balance out.

Page 2=====

The dash AC cools the area just behind the DASH (Front seat area)
"
The ROOF A/C cools the house.

It gets hot enough, I run both.
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