In layman's terms, high-power electrical products, such as motors, compressors, relays, fluorescent lamps, etc., are made using the principle of electromagnetic induction. This type of product requires a much larger (approximately 5-7 times) starting current than the current required to maintain normal operation when starting. For example, a refrigerator that consumes about 150 watts of electricity during normal operation can have a starting power of more than 1,000 watts. In addition, since the inductive load generates a back-EMF voltage at the moment the power is turned on or off, the peak value of this voltage is much greater than the voltage that the car inverter can withstand, which can easily cause the car inverter The instantaneous overload affects the service life of the modified sine wave inverter
When using an ordinary multimeter to measure the AC output of a quasi-sine wave (modified sine wave) vehicle-mounted inverter, the displayed voltage is about 20V lower than 220V.
There will be problems when operating precision equipment, and it will also cause high-frequency interference to communication equipment.