Don’t run 24 hrs. a day, contrary to popular belief. They cycle on and off every half hour. If you don’t open the door it’s half that.
When you open the door it’s like it’s like the cold air flows out like a waterfall. But refrigerators and freezers have a door on top instead of the side very little flow of cold air occurs.
So when you use your old AC refrigerator you open it a lot just to see what’s inside. You stand there looking for what’s good to eat or what needs to be thrown away. (We throw tons of food away all the time because we let it sit there till it’s no good). Someone should invent a refrigerator with a glass door.
Well they have a refrigerator already with a double glass door. It’s available and it’s in our warehouse and has been for years, it’s 12 volt. But, you can get them in standard 120 AC as well (you see them every day at the front of the check out door at the grocery store displaying cold drinks. For that matter our 12 volt top loading refrigerator/freezers also include a sliding glass doors over each compartment.
In temperate climates the Refigerator/Freezer are usually the biggest loads in the house. I designed thousands of Independent Solar Systems and systems to combat perpetual blackouts. My first question to customers from the Caribbean (usually from Haiti and the Dominican Republic was, “how many refrigerators or freezers do you have?” And, I was almost done. Because most of them didn’t need hot water heaters because the water never gets cold, and air conditioning systems because of constant ocean breezes.
Using the most efficient and smallest appliances, like refrigerators, (that your wife will agree to accept), can save you thousands of dollars.
Finally,, people never ever throw away their old refrigerators, their very ineficient energy hogs. They a members of the family, you don’t get rid of them till they virtually die. A typical refrigerator that’s 20 years old uses 600 watts, a new one uses less than half that.