PSA: Mobicool A40 3-way absorption cooler - Page 4 - Fiberglass RV


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Old 03-14-2013, 01:13 PM   #43
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right below that number it says 6.6 @ 12v, I think!! It is a 3 way, is it not?
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Old 03-14-2013, 01:21 PM   #44
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Didnt realize how heavy these guys are empty 20kgs (44lbs) add a few cold ones to it and I may have a problem moving it out of the car.
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Old 03-14-2013, 01:24 PM   #45
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Quote:
Originally Posted by cpaharley2008 View Post
right below that number it says 6.6 @ 12v, I think!! It is a 3 way, is it not?
Venturing into territory I only very dimly (and often incorrectly) understand:

I think amps "count" is different depending on the source voltage...."six point six amps" at 12v works out to about the same wattage as "point seven amps" at 120v...

Francesca
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Old 03-14-2013, 01:31 PM   #46
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Correct Francesca, both are high draws for a inverter/battery, we are saying the same thing, differently!!
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Old 03-14-2013, 01:43 PM   #47
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My only point is I believe in keeping with one you made earlier, that converting 12v power to 120v in order to run this fridge on 120v via an interior car connection would result in power losses across the inverter.

I was attempting to further point out that in order to do so, one would need a car-mounted inverter capable of putting out more wattage than most cigarette lighter-type plugs and inverters designed to fit them will supply.

Whew!

Francesca

P.S.

And if I'm all wet, I'm sure someone will be along directly to say so!
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Old 03-14-2013, 01:48 PM   #48
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gotcha...
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Old 03-14-2013, 01:54 PM   #49
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Yay!

And thanks for not taking me to task for saying "converter" instead of "inverter" in my last post...all fixed now.

Onward through the Electrical Fog...

Francesca
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Old 03-14-2013, 02:20 PM   #50
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V X A = W. For the same wattage, the other stuff seesaws. That's playground algebra for one thing gets bigger while one gets smaller to maintain equality across the parallel tracks. I'll bet that clarifies everything.

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Old 03-14-2013, 02:32 PM   #51
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The story of Pi- what a great movie!!
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Old 03-14-2013, 02:42 PM   #52
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The posted specs say
  • 15 g/h (that's 15 grams of propane per hour, which would produce about 190 watts of heat flow if burned completely)
  • 290 BTU/hour (that is 85 watts of heat flow)
  • 0.70 A at 100 to 120 V AC (that is 70 to 84 W)
  • 6.6 A at 12 V DC (that is 79 W)

The 12VDC outlets in my minivan are labelled for a maximum of 120 watts. Most inverters intended for in-car use are rated at 100 watts or more, although I have a little 75 watt inverter which would be insufficient for this application.

It has the power sources of a classic "3-way" RV refrigerator.
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Old 03-14-2013, 03:00 PM   #53
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I've got a 1500/2000 inverter, 1/0 entry cable from the battery, and solar. I can't run my dorm fridge forever but at least it WILL produce cooling performance considerablly more useful than 35 below ambient F. or 20 below ambient C. And it's about twice the size of this cooler and built-in. No free lunch folks.

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Old 03-14-2013, 03:34 PM   #54
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Quote:
Originally Posted by Brian B-P View Post
The posted specs say
  • 15 g/h (that's 15 grams of propane per hour, which would produce about 190 watts of heat flow if burned completely)
  • 290 BTU/hour (that is 85 watts of heat flow)
  • 0.70 A at 100 to 120 V AC (that is 70 to 84 W)
  • 6.6 A at 12 V DC (that is 79 W)

The 12VDC outlets in my minivan are labelled for a maximum of 120 watts. Most inverters intended for in-car use are rated at 100 watts or more, although I have a little 75 watt inverter which would be insufficient for this application.

It has the power sources of a classic "3-way" RV refrigerator.
A decimal point here, a decimal point there...
Pretty soon it's obvious why I flunked grade school math

Thanks for the correction, Brian!

Francesca
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Old 03-14-2013, 08:51 PM   #55
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It is Pi day: 3/14.

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Old 03-14-2013, 09:10 PM   #56
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Quote:
Originally Posted by rabbit View Post
It is Pi day: 3/14.

jack
I know!

I actually let Hubby off early from his make-work of calculating it to its last digit so he can celebrate...

I haven't seen him so excited since the time he 'splained to me how/why there's no gravity in our front yard!

Francesca
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