Circuit Breaker Yes Surge Energy Rating 1030 J Waveform Type Simulated Sine Wave Output Frequency 60 Hz Load Capacity (VA) 800 VA Load Capacity (Watt) 450 W Battery Size 12V Number of Batteries 1 Backup/Run Time (Half Load) 13.50 Minute Backup/Run Time (Full Load) 1.20 Minute Battery Characteristics Maintenance-free Replaceable Battery Yes Typical Battery Recharge Time 8 Hour USB Yes Serial Port Yes USB (HID Compliant) Port Yes Alarm Overload /On Battery / Low Battery