Residential Fridge versus three-way in a Class B or C

Do an energy survey as best you can...then times 1.5. Then you can select batteries with at least double the amp hours. A solar panel? Standard is at least one solar watt for each battery amp hour. Regarding residential fridge, I suggest you look up their power needs. It may not be what you heard. The right solar system eliminates the need for any generator use on most days without A/C need. Not a bandaid to cut down on generator use.