According to this report, refrigerators take around 500 kWh a year to run, or 1.5 kWh a day.
So it looks like one panel, in combination with a battery, is enough to do the job for a fridge. Unless you were talking about a walk in, then maybe a few more. Also, that Forbes article gives a figure of 20-30 panels for the average home to power it year round. A refrigerator certainly isn't half the energy a household consumes.