1.larger LCD display 2.serveral language to choose 3.N+X parallel system 4.low price 5.OEM ModelWA(RAW)5K(S)W(RW)6KL(S)W(RW)10KL(S)3W10KL(S)3W15K3W20KOutput capacity5000VA6000VA10000VA10000VA15000VA20000VAN+X parallel/redundant connection up to 3 unitsInput Voltage88~138VAC176VAC~276VAC304VAC~476VACFrequency46~54HZ(56~64HZ)Power factor>0.95>0.98>0.95Output Voltage110±1%220VAC±1%Frequency50HZ/60HZ ...