It really depends on how much power your particular refriderator uses, and the conditions you camp in. Most of the information I see on the net in regards to soar requirements drastically underestimates in my opinion. You also need to account for other uses such as parasitic draw, lights, tv if you'll be watching that any etc.
For my system euth flat mounted panels I plan on 70 percent of rated output as an average. In the spot I'm in now trees shade part of the panels 3 to 4 hours towards evening. Hasn't made much difference though as we have been getting afternoon rain about the same time of day. It's actally rare that our summer dry camping is in ares/spots where solar haverest is optimal. In the winter we use sothern areas where tree cover and afternoon showers aren't really an issue.
Plan your system for where and how you'll use it
2015 Ram 3500 Laramie CTD, 4X4, AISIN, B&W Companion Puck Mount
2016 Heartland Bighorn 3270RS, 1kw solar with Trimetric and dual SC2030, 600 watt and 2k inverters.