Tripp Lite's SmartOnline SU1500XL on-line, double conversion UPS protects critical server, networking or telecommunications equipment from blackouts, brownouts, voltage fluctuations and surges. This large-capacity 1.5kVA/1200W UPS continuously converts incoming AC to DC, then back to perfect sine wave AC output at 120V AC (+/-2%). It removes harmonic distortion, fast electrical impulses, frequency fluctuations and other hard-to-solve power problems not addressed by other UPS systems. True sine wave output and zero transfer time provide guaranteed compatibility with all equipment types. It includes 6 UPS-supported outlets. Two load banks, each with 3 outlets, can be independently controlled via a software interface to selectively reboot remote equipment or automatically shed less critical loads to extend battery runtime for the most critical equipment. Battery backup time can be extended with the addition of multiple external battery packs. This unit includes a slot for an internal SNMP/web card, plus DB9 enhanced serial monitoring port for unattended shutdown, remote control and monitoring of UPS system and power data. The HID-compliant USB interface enables integration with built-in power management and auto shutdown features of Windows and Mac OS X. It also includes Tripp Lite's PowerAlert UPS Power Management Software and is compatible with Tripp Lite's Watchdog Service Monitoring/Rebooting Software.