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10-31-2012, 09:59 AM
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#21
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Member
Join Date: Sep 2012
Location: La Verne, CA (Los Angeles area)
Posts: 92
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Re: Refrigerators (2-way) 12v & 110v?
Thanks for the info on the coldplates and physics of ice/water. It def helped my understanding.
I just spoke to Isotherm (Indel Webasto) and they told me the CR 130 w/ the ASU (variable speed and cold plate) is offered in 12v only. I'm a bit confused if this is what I want...
If the ASU senses max voltage the compressor will/can run at maximum. As the voltage or load drops it slows down. I'm guessing it would work because I'm going to have an inverter, solar panels, and two 4D batteries. Any help with this is appreciated.
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10-31-2012, 11:53 AM
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#22
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Member
Join Date: Sep 2012
Location: La Verne, CA (Los Angeles area)
Posts: 92
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Re: Refrigerators (2-way) 12v & 110v?
The cheapest I can find the damn fridge (CR 130 w/ ASU stainless - 12v only) including shipping is $1,808. The Truckfridge same size 12v only but in black including shipping is $699. Both units have the same Danfoss compressor setup.
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10-31-2012, 05:36 PM
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#23
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Senior Member
Join Date: Apr 2011
Location: Oregon Ciry Oregon
Posts: 2,843
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Refrigerators (2-way) 12v & 110v?
Jim
That frozen water jug in he back of the Truckfridge sounds really nice at that price difference. I can think of may ways to spend the difference in cost on other upgrades, in fact did.
__________________
Larrie
Read detailed trip reports, see photos and videos on my travel blog, luinil.com.
Current van: 2002 Ford E350 extended body camper with Colorado Camper Van pop top and Agile Offroad 4WD conversion.
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10-31-2012, 05:49 PM
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#24
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Junior Member
Join Date: Aug 2012
Posts: 14
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Re: Refrigerators (2-way) 12v & 110v?
These look sweet, eh.
http://www.sunfrost.com/index.html
$1,800-1,900 & Up !
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10-31-2012, 05:51 PM
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#25
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Site Team
Join Date: May 2007
Location: Southern New Mexico
Posts: 10,177
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Re: Refrigerators (2-way) 12v & 110v?
Cost is clearly a major factor. How you plan on using the SMB is a factor as well. The Isotherm ASU will help you stay camped in one location for somewhat of a longer time without having to charge back up, depending on all of your other power consumption activities. Probably won't gain more than a day or two however.
Herb
__________________
SMB-less as of 02/04/2012. Our savings account is richer, but our adventures are poorer.
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10-31-2012, 07:59 PM
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#26
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Senior Member
Join Date: Oct 2010
Location: Sacramento Delta, CA
Posts: 1,024
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Re: Refrigerators (2-way) 12v & 110v?
Just to round out the discussion, I have had one of these in my van since 2007 and it keeps on working:
See:
http://www.engel-usa.com/index.php?page ... &Itemid=59
__________________
2002 E350 ext.; 160K; 7.3L; 4R100 (w/4x4 deep pan & filter); 4x4 conv. w/2007 F250/F350 coil frnt axle (oppos. dual Bilstein press. shocks cured DW) diff chg from 3.55 to 3.73 (bad!); BW1356 t.c. (bad!); LT265/70R17/E Michelin LTX M/S2; Engel MT60 Combi Fridge-Freezer; 4 BP 380J pv panels; Auragen 5kw AC gen. in top alt. position; Webasto Dual-Top; Voyager top. 1995 5.8L EB Bronco, bone stock.
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11-01-2012, 09:20 AM
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#27
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Senior Member
Join Date: Oct 2007
Location: Newark, CA
Posts: 795
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Re: Refrigerators (2-way) 12v & 110v?
Quote:
Originally Posted by JimHefner
If the ASU senses max voltage the compressor will/can run at maximum. As the voltage or load drops it slows down. I'm guessing it would work because I'm going to have an inverter, solar panels, and two 4D batteries. Any help with this is appreciated.
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Your description about the ASU monitoring the house battery voltage is correct but keep in mind that, when the house battery drops to 12.2v, the ASU simply turns off the compressor and keeps things cold with the gel pack.
We have solar and a single AGM battery and the Isotherm does fine. No real need for an inverter as far as the refrigerator is concerned since it only runs on 12v.
Quote:
Originally Posted by BroncoHauler
The Isotherm ASU will help you stay camped in one location for somewhat of a longer time without having to charge back up, depending on all of your other power consumption activities. Probably won't gain more than a day or two however.
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I'm assuming you are talking about not having solar. With solar, you could easily stay put until you run out of water or food.
Price is definitely a factor. I think that the ASU is a major advantage. If another refrigerator continually pulls the house battery below 12.2v (the minimum AGM batteries should be discharged), the ASU might keep you from needing to replace the house battery as often. The ASU option is close to the cost of a new battery...
__________________
Jack
'01 Ford EB50p Quigley 4WD
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11-01-2012, 04:57 PM
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#28
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Senior Member
Join Date: Jan 2010
Location: Seattle, WA
Posts: 188
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Re: Refrigerators (2-way) 12v & 110v?
Funny, I just did a search for "isotherm" and found 182 matches over at least 13 pages! This topic has been talked about a lot including Isotherm's ASU, but I only learned through this thread that it appears to over double the price of a comparable frig w/o it these days!!!
As I have written in another thread, I do not think the cold plate in an RV application is any better than just keeping a couple of ice cube trays (* see note below) at the ready that you sacrifice and live without iced drinks if power is low or down. After all, the cold plate has to take up space that could be used for something else and cannot be used in drinks. And I also agree with others that whether it is a tray of ice or the cold plate, these "features" don't stretch the use of a refrig much at all. Frankly, it sounds to me like an over-hyped advertising gimmick.
Footnote * for geeks: It is hard to be the heat of fusion of just plain water!
__________________
2008 E-350 6.0L diesel: Bought new in 2010, 4x2, 4.10 LSD, HD spring-lift all 'round,
Cruiser II Top, 6'7" inside, full-time upper bed w/ kind'a EB50 layout, cozy 4-season rig
Solar: 540 W of Kyrocera w/ Blue Sky 3024iL, 3x100 AmpHr AGM's
Electrical: 4 cf fridge, nuker, water heater, compressor
Propane: stove top, furnace Travel: https://www.lugnutlife.wordpress.com
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11-01-2012, 09:08 PM
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#29
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Site Team
Join Date: May 2007
Location: Southern New Mexico
Posts: 10,177
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Re: Refrigerators (2-way) 12v & 110v?
OK, but once the ice cube tray is just melted ice, you need to start over. The ASU system refreezes the cold plate when alternator, shore, solar power is available and you're good to go again.
Herb
__________________
SMB-less as of 02/04/2012. Our savings account is richer, but our adventures are poorer.
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11-02-2012, 09:41 AM
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#30
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Senior Member
Join Date: Jan 2010
Location: Seattle, WA
Posts: 188
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Re: Refrigerators (2-way) 12v & 110v?
Gosh, is this ASU thing as contentious as what political party is best? What if we practice temperance, don't use the ice cubes for drinks and just let 'em melt and freeze again ?
__________________
2008 E-350 6.0L diesel: Bought new in 2010, 4x2, 4.10 LSD, HD spring-lift all 'round,
Cruiser II Top, 6'7" inside, full-time upper bed w/ kind'a EB50 layout, cozy 4-season rig
Solar: 540 W of Kyrocera w/ Blue Sky 3024iL, 3x100 AmpHr AGM's
Electrical: 4 cf fridge, nuker, water heater, compressor
Propane: stove top, furnace Travel: https://www.lugnutlife.wordpress.com
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