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scottykrug's avatar
scottykrug
Explorer
Oct 31, 2019

Converting to dc fridge

Ok, been perusing the threads on this topic but want to toss this out to the group to see if there is anything I have missed. All thoughts welcome...

Backstory.. our 5 year old dometic reefer has slowly lost its ability to keep our food cold. Fridge temps now go into the 50° F range which is unacceptable. I have cleaned the coils, added fans, straightened up the ductwork, and while all this originally helped, the fridge IMHO has failed. We have looked at rebuilding the ammonia system (between $400 and $700) to full fridge replacement which can go up to $2000 depending on the system. I am strongly leaning towards a dc based system as it does not have to be level, reduced fire hazard, and we never go off grid. Last time we boondocked was in our last camper almost 10 years ago. Even if we did, I can tie in a second group 31 battery backed up by a 2000 wt genset. I am reading between the lines that my truck will be able to carry the load when driving. I found a company that makes a compressor rebuild that replaces the ammonia system completely and draws less than 1 amp. I love the idea that it is the old fridge where I don’t have to rebuild my kitchen. The cost is almost exactly what it would be to rebuild the ammonia system. To me this looks absolutely perfect.

What if anything am I missing? Fire away!!!

Thank you for your reading this and your potential input.

Scooter
  • wa8yxm's avatar
    wa8yxm
    Explorer III
    There are two basic options.. One may be hard to find.
    Many have converted to residential fridges. 120 volt (Fed via an inverter) these often suck 100-300 watts running and abou a 50% duty cycle (That's a target for all fridges)

    The other, and both Dometic and Norcold made these at one time. are what I call "Danfoss Class" (Danfoss is one of the companies that makes the compressors they use. I do not know what make Dometic and/or Norcold use).. These are very high effiency compressor fridges,, meat all your requirements (off level and such) and draw (Door closed seems strange to have to say door closed) Less than 50 watts.. How does this compare? A pair of 1136 lamps is 50 to 60 watts.
  • Yep, that is where I found out about this. A sort of epiphany moment as I was ready to replace the whole fridge with a Furrion or one of the yacht designed units for much more money. As for fans.... I have enough fans now to fly it around the camper. One of the steps to try and help the old system limp along. I am quite excited about this but will wait to order. I want to see all comments here to cement the decision. I really don’t need this functional until spring.
  • Have you seen this couples videos link?
    Seems like the only problem they ran into was a lot of ice forming on the fins inside. They added interior fans to solve the issue.

    Scott
  • I assume you're talking about the one from JC Refrideration?
    Yes, the DC version is the way I will go if this POS cooling unit still wont work right next year.
    It does draw more than 1A @12VDC though. Not a deal killer to us.

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