Chuckles, the best way to run the numbers and compare systems is to put everything in kilowatt-hours. And, a household fridge draws much less power than you might think, once you realize that it cycles on/off and uses almost no power for substantial amounts of time. (Especially if you don't go frost-free.)
There are also differences in how you use--or waste--the power generated from solar panels. An MPPT controller will provide a 20-30% power gain, compared to a dumb regulator that simply dumps excess voltage. BIG change in the amount of power you get out. Solar panels are pretty much all built to standards and regulations in the US, if yours are rated for 80W they will put out 80W, plus or minus a 10% manufacturing tolerance, during midday on the bright sunny times of the year. But if that's measured at 20VDC output, and your regulator is knocking that down to 14 VDC? You'll only see 57W in useful power, and that only during a 4-6 hour peak period. Roughly 300watt-hours, which you might see as 20-25 "amp hours". That's all they are rated for--if you follow the conversions, and use a dumb regulator.
AFAIK the cheapest MPPTs are going to set you back over $200 though, and that's the new low-priced stuff.