I use an electric fridge that draws about 80 watt average with a 1/5 duty cycle in typical summer 85f ambient. This is a 120v unit run with an inverter. I have 320 AH of battery capacity and am using a single 235W module. I have no other significant or parasitic draws in the trailer, basically designed the solar to run the fridge. I figure three days without sun is about my maximum. The good news is that the 235W module harvests some power even in cloudy conditions and throughout the whole day.
The 12v Danfoss compressor fridges draw less power (maybe 20% less) but cost 8-10 times more, initially. I also needed an inverter that cost more than what I could have used just to run entertainment devices.
