The output power of a microwave oven of 900W does not mean that the electrical appliance consumes electricity. It also depends on the usage of the electrical appliance.

900W only indicates the output power. The actual power consumption depends on the input power or rated power of the microwave oven and its normal use. The rated power only indicates its ultimate power, while the output power Comparing with the input can know the working efficiency of the appliance.

If the power marked on the microwave oven is 1000W, it theoretically uses 1 kilowatt hour of electricity per hour, but in fact it does not necessarily mean that the microwave oven must consume 24 kilowatt hours of electricity every day.

But when it is running at the highest power, it consumes 1 kilowatt hour of electricity per hour. However, it will stop running when it reaches the set temperature. At this time, it will no longer consume power. Most electrical appliances This is the principle, so power consumption cannot be judged by power consumption.

Extended information:

When consumers purchase a microwave oven, the parameter they often consider is the power of the microwave oven. When choosing a microwave oven, you should not just look at the power, but also the output power, because the output power is the useful work for heating food.

The input power of a microwave oven is usually marked on the back of the machine. The smaller the difference between input power and output power, the better. The smaller the difference, the greater the effective power of the microwave oven.

Baidu Encyclopedia - Microwave Oven

Baidu Encyclopedia - Rated Power