Unless the compressor is not allowed to rotate and only air is blown, it is impossible to generate electricity once a night, which is no different from an electric fan, not an air conditioner. It's just a marketing tool of Gree. First, define what night is. Suppose you go to bed at night 10 and get up at 6 o'clock the next morning. These eight hours are called one night. Let's talk about the power consumption of air conditioners. Take a small inverter air conditioner as an example. The refrigeration capacity is 2000W, which is the highest energy efficiency standard at present, and the first-class energy efficiency COP is 3.6. Suppose you can make a super energy-saving air conditioner with COP=4 exceeding the first-class energy efficiency, and its basic power consumption is 500WW. Air conditioning refrigeration is to move the heat generated indoors to the outside to keep the indoor environment comfortable and cool. The sources of indoor heat include human body heat dissipation, radiation heat and conduction heat invaded by the atmosphere from walls, doors and windows, heating and heat dissipation of household appliances, etc. , all belong to the air conditioning load. So the air conditioning engineering design engineer calculated that the heat load of a room with 12 square meter is about 2,200W, which is what we often say. In this way, a room of 10 square meter is equipped with an air conditioner with a cooling capacity of 2,000W hours, which just meets such heat load demand. Therefore, in the course of eight hours, an air conditioner with a cooling capacity of 2,000W per hour and a cost of 0.5 kWh will consume 4 kWh to complete the work of moving heat to the outside. This is just a matter of energy balance, not 1 kwh. One kilowatt-hour electricity in the evening is the test data of a special laboratory without human body heat, and it is a warehouse with excellent thermal insulation performance. It is by no means a phenomenon under normal installation and use. Consumers must recognize this fact and not be deceived by the advertising language of unscrupulous manufacturers.