... year warranty14. Factory direct selling15. Application: cars, trucks, trailers, boats, solar systems, wind generators, laptops, camcorders, cell phones and so on ... THD≤3%Transfer time≤4ms automatic tranferOverload120%10min,1501minPeak factor3:01:00Max.working altitude≤4000m (the altitude prep above 1000meter,derate ... -circuit,over load,high-voltage,over temperature Inverter 1500w for solar system