1.Max efficiency:96% Euro efficiency:95.5% 2.THD<3% 3.MPPT>99.5% 4.CE, SAA,etc certificates 5.5 years ... standard warranty SpecificationsCE, SAA, etc certificateMax efficiency 96%Euro efficiency 95.5% IP 655 year warrantyUp to 20 years warranty extensionHigh quality and ... housingAutomatic protection including over voltage, islanding, short circuit, overload5years warranty grid tie solar inverter