... Max efficiency to 90%7. Topology: Microprocessor8. Low battery voltage, over battery voltage, lack-voltage alarm ... 1000W Waveform Modified sine wave Frequency 50Hz / 60Hz THD <5% Protection Low Voltage Alarm DC10.5± ... Outlook, Input voltage, Output voltage, Frequency, Socket type, Protection functions(Low battery voltage, over battery voltage, lack- ... DC to 220 volt AC inverter, Power Inverter, Inverter