New Fridge Topic: A Different Approach - Page 7 - Escape Trailer Owners Community

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Old 09-28-2014, 07:07 PM   #61
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Please start a new thread and keep us updated via it. I am very interested in doing something similar with my 6.7.
I will start a new thread when I get started and will document the project in detail with pictures.
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Old 09-28-2014, 09:20 PM   #62
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I will start a new thread when I get started and will document the project in detail with pictures.
Yeah I spoke to Nova Kool some months ago and "suggested" they contact ETI regarding using the compressor fridge as an option. Don't know what came of it, but it makes sense if you have the solar. Very high efficiency and low amperage draw, plus, they're right down the road in east Vancouver.
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Old 09-28-2014, 09:55 PM   #63
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yes, depending on how the Dometic solution works out, I have considered adding a 2nd solar panel for the Nova Kool. Wonder if I would be happy with not adding 2 more 6v batteries.....
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Old 09-28-2014, 10:27 PM   #64
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yes, depending on how the Dometic solution works out, I have considered adding a 2nd solar panel for the Nova Kool. Wonder if I would be happy with not adding 2 more 6v batteries.....
I think a pair of 6 volt batteries is sufficient. They say that these units run about 50% duty cycle once cooled, even in hot temperatures. The unit I mentioned draws 5.2 amps while running so 50% duty cycle works out to about 62 amps per day. During the day the unit will draw the most power when it is hot and the sun is providing the most power to the panel(s). Over night, when it is cooler the duty cycle should go down while the draw is completely from the batteries and I believe they will perform just fine.
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Old 09-28-2014, 10:40 PM   #65
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Thank you.

Another issue for consideration is the lower sunlight in the non summer months up here in the PNW. Supposing the equivalent of 3-4 hours sun per day, times 18.28 amps with 2 solar panels, makes it a little tighter...............but probably still ok because fall/winter trips will be of shorter duration.........
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Old 09-28-2014, 10:57 PM   #66
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Thank you.

Another issue for consideration is the lower sunlight in the non summer months up here in the PNW. Supposing the equivalent of 3-4 hours sun per day, times 18.28 amps with 2 solar panels, makes it a little tighter...............but probably still ok because fall/winter trips will be of shorter duration.........
I'm also thinking there is some correlation between the need for power and the amount of available sunlight.
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Old 09-29-2014, 12:24 PM   #67
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I'm seriously looking at the Nova Kool RFU6800 as a replacement for my Dometic 4.3 that has always had marginal cooling performance. The RFU6800 is a 12 volt, 6.8 cuft, 2 door unit (refer on top and freezer on the bottom) with a Danfoss compressor that will fit in the space I currently have my 4.3 and microwave. I have plenty of battery and solar charging capacity to run this unit off the grid, boondocking, even on grey days. Removal of the old unit and installation of the new one will be pretty simple. I also plan to well-insulate the vented area in the back. I like the larger refrigerator with the separate 2.5 cuft freezer door on the bottom for good efficiency. Right now I'm getting quotes; looking for best price and availability. Hopefully this will become reality before Christmas.
Okay. If the compressor refers are so much better, why aren't they used instead of the Dometics?

Is there a cost issue? Will the Nova Kool fit through the door? Is there a downside to compressor units that would explain why they are not the standard?
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Old 09-29-2014, 12:45 PM   #68
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FYI - resent my email to Dometic regarding purchasing a T class RML 8555 and received this back:

Hello Mel,
------------
My apologies that this has taken so long to get back to you on, but we've had to pull in quite a few people in other departments to help me find an answer for you. We are still currently working on it and will very soon hopefully have an answer for you.

Sincerely,
Nikki Clemans
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Old 09-29-2014, 12:46 PM   #69
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After spending a few days in the 21, I am truly disappointed in our fridge performance. The highs each day have been in the high 60's or very low 70s. We have had to keep the fridge on '5' to keep the temps in the acceptable range (below 40 in the main compartment). Given the discussion on the forum, I expected marginal performance, but even so, I am surprised. i guess I had expected we do keep the temps acceptable with the fridge on "4". We will see how the towing goes today.
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Old 09-29-2014, 12:51 PM   #70
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This topic is about an approach to resolving issues specifically with the 8XXX series from Dometic. Compressor-based refrigerators are a valid alternative, but I think their use is a separate subject.
I have responded to the specific question raised about the absorption/compressor choice in the recent AC/DC Refrigerators, in post #35 of that thread.
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