It is important to keep your refrigerator and freeze full so that they do not have to work as hard to stay cold. This does not mean that you have to keep it stocked at all times with foods. If, your appliances hold more food than you can possibly consume, stock them with bottles of water. Keep frozen liquids in the freezer. By keeping them full, you will drastically lower the amount of energy that they'd ordinarily need to function properly.
Another advice is to prevent opening your freezer and refrigerator doors too often. Every time that you open your fridge and freezer they have to work harder to stay at the appropriate temperature. Obviously, you need to open them to get food. But, try to be efficient about it so that you do not have to open and close the doors as often. Keeping these appliances well stocked and closed at all times will help during a power outage. When you lose power, do not open the fridge and freezer doors. Your food should remain cold and preserved for about 30 hours.
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