Army Girl,
I'm not quite sure where you are coming from and how much you want to spend.
If you are into big bucks ($3,000), buy a Sunfrost refrigerator or freezer that can be run on 12 volts or 120 volts AC - your choice. They are the most efficient apppliances you can buy.
But what most people in the boondocks do is have a propane fridge/freezer.
Todd