Lots of good advice. I run a Nevercold (aka:Norcold) 0041 ac/dc fridge in my Tiger. While it was suppose to be the top of the line, rugged marine/adventure RV fridge it's been nothing but trouble which is amplified by the lack of any customer service from Norcold. While I really like the concept of an ac/dc fridge I've learned a couple hardlearned lessons.
1) Verify build date code prior to accepting the fridge since thats what your warranty will be based from. (eg: My new in the box Nevercold was built several years before I took delivery so it was technically out of warranty when I had my first problem)
2) There is no such thing as a Nevercold "authorized" RV refrigerator repairman or service center. Sure, they are plenty of RV repair facilities but they will charge you out the ******** just to guess at what is wrong and typically won't warranty their own repair. They also hate dealing with Nevercold as a company.
3) AC/DC fridges hate hot weather. They either won't keep cool or shutdown once they get hot. Install a small, low volt computer fan over the coils(?) to help cool it so it keeps running.
4) At least with a Nevercold plan on replacing the thermorestor, thermostat and sensor coil as normal, routine maintenance and keep extra parts around for ongoing repairs.
5) Budget for a new house battery (runs the fridge) every 2-3 years since the Nevercold will kill it.
Cheers!