APC SRTG8KXLI (Tower/Rack) APC Smart-UPS RT 8kVA 230V High Density, Double-conversion Online, Lead-acid battery Max Configurable Power (Watts) 8.0KWatts / 8.0KVA (4m 55s Backup time on Full Load of 8000Watts) Interface Port(s) Hard wire 3-wire (H N + E) 1 RJ-45 Serial, Smart-Slot, USB; Multifunction LCD Network Management Card 3 with Environmental Monitoring