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Old 08-12-2021, 11:39 AM   #1
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JC Refrigerator Conversion

Has anyone replaced their 1200 norcold guts with the jc refrig. conversion to 12 volt compressor? If so how does it work does it stay cold.
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Old 08-12-2021, 11:44 AM   #2
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They recommend the 120v unit for a 1200. I'm at 2 plus years and love it. I did install a 600 watt dedicated inverter with an automatic transfer switch.
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Old 08-12-2021, 02:46 PM   #3
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I also went with the 120v version. My ice maker plug on back is powered by the inverter. So no extra wiring required. If you go with the 12v you will most likely need to run a dictated 10 gauge with to the back of your fridge which is what JC recommends. Mine pulls .9 amps. I did not have to install a new inverter, it work fine with my old 2004 modified sign wave version. It also works great and keeps ice cream frozen hard. Just got back from 2300 mile trip with no problems. I think JC charges $250 for the install. You need to make a appointment in advance as they are very busy during the summer. I did my on install at my house.
Good luck.
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Old 08-12-2021, 02:59 PM   #4
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Mine is set up the same John. The smaller inverter is just to save the batteries from running the big inverter. If it dives the icemaker plug-in is a backup.
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Old 08-12-2021, 04:05 PM   #5
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I went with the 12V version because I didn't want to run an inefficient DC-AC inverter 24/7. That choice was based on my electrical engineering background. Overall the 12V version is going to be more efficient and use less overall energy from your batteries. Any DC-AC converter is going to be at best 80%-90% efficient and is the root cause of the loss of efficiency. Net result is a 120V powered unit running on a DC-AC converter is going require 110% to 120% more current from the battery anytime you aren't connected to shore power.

Another factor is if you are running your inverter 24/7 any other items such as TVs, microwaves and etc. that are connected to the inverter supplied 120 VAC are drawing perisidic power even when turned off. This results in even more drain on the batteries.
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Old 08-12-2021, 05:50 PM   #6
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Neighbor replace his sorry RV fridge cooling unit with a 120 VAC compressor unit. Works great for him.

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Old 08-13-2021, 04:30 AM   #7
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I converted to the 120v system and use the ice maker plug because it powered by the inverter. I had this done 2 years ago and have been very happy.
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