Output Output Power Capacity 540Watts /900 VA Max Configurable Power 540Watts /900 VA Nominal Output Voltage 120V Output Connections (3) NEMA 5-15R (Surge Protection) (4) NEMA 5-15R (Battery Backup) Input Nominal Input Voltage 120V Input Frequency 47 - 63 Hz Input Connections NEMA 5-15P Cord Length 1.83meters Input voltage range for main operations 88 - 139V Input voltage adjustable range for mains operation 78 - 152V Batteries & Runtime Battery Type Maintenance-free sealed Lead-Acid battery with suspended electrolyte : leakproof Included Battery Modules 1 Typical recharge time 8hour(s) Replacement Battery RBC32