Possible AC/DC Fridge Replacement Fit - Page 3 - Escape Trailer Owners Community

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Old 07-19-2014, 11:51 PM   #21
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The dual 6 Volt batteries offered by Escape can provide an estimated 232 Ah of 12 Volt power.
Are you factoring in the fact that even deep cycle batteries suffer when more than half the available Ah is withdrawn? So, to extend the lifespan of those expensive batteries, you should estimate half of 232, or 131 Ah is available on a regular basis.

"Very few lead-acid batteries die of old age. Most are murdered by their owners", said someone who knows far more about batteries than I.

And even worse, a trip to where the sun never shines, like the Pacific Northwest? Or so I have heard...

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Old 07-19-2014, 11:53 PM   #22
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Yes, "116 Ah", says someone better at simple division than I...
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Old 07-20-2014, 12:01 AM   #23
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The link is the spec sheet showing the dimensions and models for all of the NovaKool fridges. There are some that may work (at least dimension wise) to replace the 6.7 CF Dometic RB 8555 as well.

F
http://www.novakool.com/products/sin...al2013_002.pdf
Don't know why they're so modest about being around for over 20 years. They've sure been around a lot longer than that. I bought a unit in 1982 for a boat I was building. It worked really well although with 8D batteries and a diesel generator I didn't really pay much attention to its' power consumption.

I'd buy one again although if I do it'll be to make a top loading chest type unit under my settee and I'll use a holding plate.

For those that have a 12 volt charging line from their tow vehicle and find the draw of propane unit on 12 volts to be a little more than their tug can supply, this unit should be able to more easily be run on 12 volts underway.

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Old 07-20-2014, 12:11 AM   #24
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...Or am I missing something?
Well, as long as I am spending someone else's money, here is a suggestion...

Retrofit the existing ETI installed refrigerator with one of these:
//http://www.westmarine.com/buy/waeco-adler-barbour--cu-100-air-cooled-coldmachine-compressor--11861085

The compressor could run during the heat of the day, the propane at night. Powerful cooling during the day when the solar panel is contributing, then quiet and no-battery cooling at night. Best of both worlds, perhaps? No woodwork design changes necessary. The compressor could be located remotely in a storage area with forced air cooling (which I have actually done on a boat). The evaporator is quite space efficient so you won't loose food storage space.

Send us pictures...

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Old 07-20-2014, 12:23 AM   #25
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Well, as long as I am spending someone else's money, here is a suggestion...

Retrofit the existing ETI installed refrigerator with one of these:
//http://www.westmarine.com/buy/waeco-adler-barbour--cu-100-air-cooled-coldmachine-compressor--11861085

The compressor could run during the heat of the day, the propane at night. Powerful cooling during the day when the solar panel is contributing, then quiet and no-battery cooling at night. Best of both worlds, perhaps? No woodwork design changes necessary. The compressor could be located remotely in a storage area with forced air cooling (which I have actually done on a boat). The evaporator is quite space efficient so you won't loose food storage space.

Send us pictures...

-
Alan
Alan, now you're biting off more than I can chew.
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Old 07-20-2014, 12:26 AM   #26
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Batteries should not be discharged below 50% - so you need to figure 116 amp-hours.
Yes, that's true. I stand corrected. See, I always miss something. I'm also told that various battery monitors also alert you when they get too low, and some can prevent excessive discharge.

So, based on that, about 2 and a half days with just the fridge, no recharge, and about half that with everything running. But, with adequate solar and the batteries to store it, boondocking is still not out of the question.
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Old 07-20-2014, 12:34 AM   #27
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... and the batteries to store it...
Last week I suggested we needed a 5 kWh, 110v, 30 pound, $100 lithium super battery.

I'm still waiting...

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Old 07-20-2014, 12:57 AM   #28
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Last week I suggested we needed a 5 kWh, 110v, 30 pound, $100 lithium super battery.

I'm still waiting...

I'll get in line. I want ten.
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Old 07-20-2014, 01:03 AM   #29
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I agree that planning for discharge to the 50% level makes sense, but that's not a magic level. Each discharge cycle reduces the battery life, and deeper discharge uses more life. If you discharge deeper a couple of times a year, the battery won't suddenly die as a result... assuming you don't run it completely flat.
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Old 07-20-2014, 01:12 AM   #30
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Man, this forum is like going to RV University. Love it.

Just looked up the Go Power system online and was digging through the specs. If you have two of the 160W panels, Carmanah says it will maintain your battery charge up to 18 amps per hour depending on the light level. So, one panel can give you up to 9 amps per hour. I've seen other comments here that show an output of more like 6.75 to 7 amps. That supports the theory that going with a DC fridge is not only practical, but will work for boondocking.
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