Maximum input power:1×400Watt Output voltage mode:120/230V Auto Switch PV Open circuit voltage:30-60Voc Operating voltage range:22-60V Starting voltage range:22-60V short-circuit current:18A Maximum working current:16A Output parameters:@120V/@230V Maximum Output Power:350watt/350watt Rated Output Power:320watt/320watt Output current:2.91A/1.52A AC voltage range:80-160VAC/180-280VAC Number of branch connections:15 units/25 units AC frequency range:47.5-52/57.5-62Hz Power factor:>95% Static MPPT efficiency:99.5% Max output efficiency:95% Loss of power at night:<0.5w Total current harmonics:<5% Size(L×W×H)mm:165×176×38 Net amount:0.82kg Waterproof grade:IP65 Temperature range:-40°C to +65°C Heat dissipation mode:Self-cooling Communication mode:433MHz