Responding backward -
I was a little surprised - I was expecting the marine-standard Danfoss compressor, but the label on the compressor says "SAWAFUJI Model SK-511N". It uses R134A refrigerant.
It's dual voltage - It runs on both 115 volts AC and on 12 volts DC. It will run on 115 volts if 115 is available, if 115 isn't available, it will run on 12 volts, but if the battery voltage drops below about 11.6 volts, the unit will shut down. The unit has a small 115/12 volt regulated power supply on top - the power supply has a standard computer cord inlet, so it may be possible to run on 230 volts with only a power cord change, but I don't know this as a fact.
The power supply is the black rectangle on top of the unit - the longer rectangle is the normal Norcold control module for the unit when it is a refrigerator.
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