Changing a freezer into a super eco fridge

Even the most ecological fridges (A++) on the market are only reaching 90kWh per year power consumption. That is not enough for a fridge in my opinion knowing that some ecological energy efficient freezers with minus 18°C inside only need 130kWh per year. I am dreaming of the following project: putting a fridge's thermostat into one of these well insulated energy efficient eco freezers and therewith building my super green eco fridge. I calculated that the fridge's power consumption would be around 30-40kWh per year at 25°C room temperature.


Now i found somebody describing the changing of a chest freezer into a super eco chest fridge reaching 36,5kWh a year: http://mtbest.net/chest_fridge.html