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Answer: In layman's terms, the application of the principle of electromagnetic induction produced by high-power electrical products, such as motors, compressors, relays, lamp and so on. These products require a ratio of at startup current required to maintain normal operation is much larger (approximately 3-7 fold) of the starting current. For example, a power consumption during normal operation of about 150 watts refrigerators, its starting power up to 1000 watts or more. Further, since the inductive load or disconnect the power supply is turned on the moment, will produce * voltage potential, the peak voltage of this inverter can withstand far greater than the voltage value of the inverter can easily lead to transient overload , affect the service life of the inverter. Therefore, such an appliance to the power supply waveform demanding.