This is 3000w/9000w 24v Pure Sinewave Low Frequency Inverter, it is with Isolated output transformer to provide users with cleaner energy. 3000w with 3 times 9000w instantaneous power, more protective, it is suitable for various loads. This 3kw low frequency inverter has complete protection function, input over/low voltage, overload, short circuit, low battery voltage, over temperature etc.