Typically, 5KW is enough for a home generator. If you can reduce some electrical appliances, 2KW will be enough.
The specific calculation method based on commonly used electrical appliances is as follows:
1. Power level of common household appliances:
Microwave oven 600-1500 watts
Rice cooker 500----1700 watts
Stove induction 300----1800 watts
Electric wok 800----2000 watts
Electric water heater 800----2000 watts
Refrigerator 70----250 watts
Electric heating 800----2500 watts
Electric grill oven 800----2000 watts
Oven sterilization 600----800 watts
Electric iron 500----2000 watts
Air conditioner 600 ----5000W
Air conditioner 1000W< /p>
Microwave oven 1000W
Electric cooker 1000W
Electric water heater 1000W
Vacuum cleaner 800W
500W hair dryer
500W electric iron
Washing machine 500W
TV 200W
Computer 200W
Kitchen hood 140W
Fan 100W
0.5W flashlight
50-100W lighting
2. Calculate the power of electrical appliances that must be used during a power outage
250W refrigerator
200W TV
200W computer
50-100W lighting
< p>The starting battery box is a compressor type, and the starting current is calculated as 2.5 times, so the generator power of the refrigerator is 250*2, 5=625W< /p>Thus, the minimum power of the domestic generator is 200+200 +100+625=1125W, which leaves some power available, so a 2KW generator is enough!
3. Calculating the power of commonly used electrical appliances
Some families can add air conditioners, electric water heaters and other equipment to the necessary electrical appliances:
Because air conditioners are understoodHowever, the starting current of the air conditioner is also calculated based on 2.5 times. A 1000 W air conditioner requires a generator power of 2500 W. Coupled with the 1000 W power of the electric water heater, plus the 2000 W power of the essential original electrical appliances.
< p>So, commonly used generators in home appliances are 1125W + 1000W + 2500W = 4625W, which leaves a few 5kW spare generators are enough!Energy consumption is 8 kWh per hour.
Chengdu, a common unit of electricity in Chinese households, that is, kilowatt hour, the symbol is kWh, the energy consumption of an appliance with a power of 1 000 watts in one hour. Electricity consumption is 1 kilowatt hour.
The kilowatt hour is what we usually call the “degree”, which is the unit of electrical power. The symbol is: kWh. The calculation formula is thenssance multiplied by time. Suppose the power of an energy-consuming device is 2,500 watts, that is, its power consumption per hour is 2.5 kilowatt hours, or 2.5 kilowatt hours of electricity per hour.
The power is 8000W=8KW, so the electricity consumption in one hour is:
8KW*1h=8KW·h, or 8 kilowatt hours of electricity.
So 8,000 W uses 8 kilowatt hours of electricity per hour.
Detailed information:
Power consumption of commonly used electrical appliances:
< p>Power consumption of commonly used electrical appliances (continued):Electric energy and safe use of electricity
Relationship between electrical power and current: in household circuits , the voltage U= 220V for sure. Because I = P/U, the greater the total power P of the electrical appliances, the greater the current ttotal I in the circuit is high. If the total current in the circuit exceeds the safe value, the fuse will easily blow. Therefore, do not use several high-power electrical appliances at the same time in the domestic circuit.
When using high-power electrical appliances, you must add a fuse to the electrical box. The function of the fuse is that when the current in the circuit exceeds the maximum normal operating current allowed by the circuit. the fuse will automatically blow, thus protecting the circuit.
Electric power (W) is the same as the unit of electrical energy. The international unit is the Joule (J)
The formula for electric power: P=W/t (t). in the formula represents time, and the base unit is Seconds - s, also commonly used hours - h unit for calculation)
The electric power measurement formula: P = UI (U in the formula represents la voltage, the basic unit is volt-V; Capital I represents current, the base unit is ampere-A)
According to Ohm's law: U=IR (R in the formula represents resistance and the base unit is ohm-Ω)
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