You can use a low-energy refrigerator, because the insulation layer is thick and the temperature rises slowly after power failure. You can refrigerate by freezing some ice cubes. However, the refrigerator is afraid that frequent startup and voltage fluctuation will make it difficult to protect and start the compressor. You just need to make sure that you can use it safely without the above two points. If there are the above problems, it is good to solve them. Buy a voltage regulator with sufficient power supply and delay protection for 3 minutes after power failure. The price is not expensive either. I used 70 yuan.