I have a KitchenAid Preserva, it's really great here a little information about it.
The Preserva® Food Care System’s three elements work to keep your food at its freshest, for longer. Sequential dual evaporators create the ideal humidity level, the FreshFlow™ Produce Preserver absorbs food-spoiling gases and the FreshFlow™ Air Filter reduces common food odors. Which means more deliciously fresh produce and fewer trips to the market.
Estimated Yearly Operating Cost is 57 to 61 dollars
• Automatic Defrost
• Side-Mounted Freezer
• With Through-The-Door-Ice Service
KitchenAid by Whirlpool
Capacity: 23.9 Cubic Feet
Estimated Yearly Electricity Use is 570 kwh
Your cost will depend on your utility rates and use from the state you live in.
Its really a beautiful piece of equipment I would reccomend it highly.