Yueqing Sandi Electric Co.,Ltd is one of the leading China dc to ac inverters manufacturers,Website:http://www.cnsandi.com, welcome to wholesale cheap dc to ac inverters from our professional factory. Technical Parameters  Model SDP-50KW Isolation mode Low Frequency Transformer DC Input Rated voltage (Vdc) 360V   Rated current(A) 139A AC Output Rated output power 50KW   Output waveform Pure Sine Wave   Rated Voltage 220V±3% 110/220VA±3% 380VA±3%   Phases Single phase 2 phase 3 wire 3 phase 4 wire   Rated current (A) 227.27A 227.27A (phase current) 76A (phase current)   Frequency 50Hz or 60Hz   Rated output voltage range (V) 110/120/220/230/240/380/400/415/440VAC optional   Phases Single / Two/ Three phase optional   Power Factor (PF) >0.95   Overload Ability 150%, 5 seconds   Efficiency >94%   Waveform distortion rate (THD) <3%(Linear load)   Dynamic Response  (0 to 100% load) 5%,  ≤50ms   Display LCD   Running mode Working continuously   Electrical insulation properties 2000Vac, 1 Minute AC Bypass Function  Optional Solar Charge Controller built in Optional AC to DC battery Charger built in Optional RS485 remote monitoring Optional Wide voltage input 100-850VDC(optional)  Off grid inverter can work without battery Protection Function Protection Input reverse polarity, under voltage, overvoltage, output over-current, short circuit, overheating etc.   Cooling method Fan-cooled   Short-circuit protection No automatic recovery, need to restart the machine Working environment Noise ( 1 meter)  ≤50dB   Degree of protection IP20(indoor)   Working Altitude (m)  ≤2000   Working temperature -25~+55℃   relative humidity 0~90%,non-condensing Mechanical dimension Depth* Width * Height 700x750x1300mm   Weight (Kg) 370Kg Certification European CE(EMC & LVD), SAA