... charger.6) Full output power to 50°C(122°F)without de-rating7) Can working about 20 years, strong ... /60HZ (Auto detection)Efficiency(Line Mode)>95%Transfer switch Rating30ATransfer time ac to dc/dc to ac10ms (typical)Inverter mode ... ,Short,Under/ Over voltageProtection ClassIP25Display LEDInverter, AC input ,Operating state,AlarmConnectBattery,AC output ,AC inputSize(H×W×D)200×120×370mmWeight6kg