Here's a usage table put out by Steca for the approximate energy requirements for various ambient temperatures and different fridge/freezer temperatures for their two DC models (PF166 and PF240). Hopefully this helps others. The Stecas come with a drain plug on the bottom for emptying residual water. Condensation is definitely an issue for us here in Central Texas and we have to wipe the bottom of our fridge out every 2 to 3 months, depending on how humid it is. Remember, however, that our off-grid place does not have air conditioning. Both Stecas are inside. Also, keep in mind the operating temperatures for these units are from 50 deg. F to 109 deg. F. Not sure what would happen if you are below the minimum operating temperature. Just something to consider.
Conext XW6848 with PDP, SCP, 80/600 controller, 60/150 controller and Conext battery monitor
21 SW280 panels on Schletter ground mount
48v Rolls 6CS 27P
I am available for custom hardware/firmware development
I'd give up some amount of efficiency if a freezer had thermal storage and an oversized compressor such that it only needed to run for 6 hours/day (ie, while non-battery solar or generator power is available).