... UL,IEC,VDE certificates 4.Frequency 50/60HZ 1500w Pure sine wave inverter, 1.5KW-6KW Solar Inverter With 8 ... , ISO9001, UL, TUV, CE and so on quality standards. Model1500W2000W3000W4000W5000W6000W InputRated capacity(W)1500W2000W3000W4000W5000W6000WCommercial Power range(VAC ... commercial inversion state:60/50±0.5protectionoverloadInput/output over high or low protecting; low battery protecting; surge ...