So this is what I'm going to do. I could get a Norcold N8DC delivered to a local RV shop for $1514. A 1 year warranty. In looking over other 12v alternatives none will just drop into the N641 hole and some won't get thru the door and most will need some cabinet height adjustment. Keep hearing about Danfoss compressors but any brand I can find has only a 2 year warranty on the compressor.
Started to look at energy consumption and it is almost a wash between 12v and 120v as far as watts consumed. Ya, but the inverter loss they say. In my rig solar goes thru an MPP LV2424 to the 24v LiPo4's and inverted back out as 120v to the PD distro panel.. where it would be sent out as 120V or bucked down to 12v for use by a new 12v fridge. So no matter what, inverter loss is a given... and by staying with 120v could actually be more efficient than the 12v alternative. ( That's actually a question if you have an opinion.)
So now looking at an EnergyStar rated MagicChef. Have to do some remodeling to accommodate the height but that may have been unavoidable anyhow.
Almost 1/4 the price for 3 additional cu ft and a 5 year warranty on the compressor... and it will fit thru the door.
https://www.homedepot.com/p/Magic-Chef-10-1-cu-ft-Top-Freezer-Refrigerator-in-White-HMDR1000WE/302245066?MERCH=REC-_-pip_alternatives-_-313489925-_-302245066-_-N&#product-overview