Gee, $7,000 seems like a lot just to run a refrigerator. How about something like this instead:

Alternative to solar/electric refrigerator

I see several advantages here, the biggest one being that you can use any relative heat source to run this sort of unit with. With some minor modifications, you could even run this thing using a wood fire, bunker oil, coal, whatever you can find and burn. You could even make a cheapo solar collector that would run this thing, which is going to cost far less than PV arrays and batteries.

I like flexibility and thrift.