Originally Posted by ranger42c
I don't see how that tracks. The Danfoss compressor runs on DC (sorta) anyway, even when you provide AC to the power supply. Unless they meant the power supply (which converts AC when present to DC) is physically part of the Danfoss compressor? and the reason you needed to replace the Danfoss is because the converter isn't working?
My original fridge was a Norcold DE828.
Yours may operate differently, but that model was actually AC only, with its own inverter to get the AC when DC only was present.
When it failed (a relief, as it turned out) I went to the local Marine Fridge guru, "Freddy Freezer" in North Vancouver. He had enough experience with Marine fridges that he immediately knew the solution. My present fridge is the old box, plates, doors, but the built in power supplies and the AC units have gone. In their place is a 2.7 amp (when running) Danfoss unit.
Now, instead of a draw measured at over 10 amps, that required a second set of house batteries, I was able to add a freezer (another 3 amp Danfoss) and lose the excess weight and expense of that second house bank.
Replacing the AC/DC with DC only cost more than a Costco AC fridge, but way less than a new Norcold but I continue to save on battery replacements.