We have a Dometic 65 Refrig/freezer combination in our Eagle Shell. For long trips like the 10 day trip we just took to Big Bend Ranch State Park, we set it up 1/3 freezer and 2/3 refrigerator. We then freeze a bunch of entrees, chicken, pork chops, steaks, burgers and ice cubes for cocktails plug it into 120 volts the day before and then we travel with the Dometic running on the alternator. Upon arrival, we change the setup to all refrigerator. I only have 80 watts of solar and have found the freezer and my C-Pap draw a little too much power. But with the refrigerator only and the frozen entrees, we easily went ten days. The entrees remain frozen for many days, in fact in the early part of the trip we had to thaw some meat. We should have left the first 3 days of food unfrozen.
We did run out of ice cubes by day 7, but by then there was plenty of room in the Dometic for the Bourbon. I have a second battery in the Eagle for the Dometic, C-Pap and Propex Forced Hot Air furnace. The AGM "house" battery charges with the solar panels and/or the alternator if needed.
As someone said early, I like not being dependent on ice. Also, we have found many uses for the Dometic not related to camping. We use it for groceries when we shop, so we don't have to worry about heading right home. Also, serves as an extra freezer or refrigerator when needed at home.
2016 F150, FX4, XLT super cab
2019 FWC Hawk Shell
2009 Ford Ranger 4x4, XLT, Supercab total loss on 7/30/19
2014 FWC Shell total loss on 7/30/19
Towed behind our home which is a 2005 Kountry Star Diesel Pusher