Tripp Lite's SU20K3/3XR5 20kVA SmartOnline 3-Phase Intelligent, True On-Line Extended Runtime UPS System has been redesigned to save valuable space and simplify runtime scalability. The SU20K3/3XR5 features a large internal battery compartment that contains more internal batteries than the equivalent standard-run model (SU20K3/3) and more space to add additional optional internal battery packs to extend runtime. Large capacity 20,000VA/16,000 watt UPS continually converts incoming AC power into filtered DC power, and then resynthesizes it back into AC power with a pure sine wave. Hardwire input and output connections support a variety of permanent or PDU style power connections. SU20K3/3XR5 features 120/208V AC, 3-phase, 4-wire (plus ground), wye input and output. It also features a wide input voltage correction range: 96-144/166-250V AC. An accessory slot accepts an optional internal SNMP card (model # SNMPWEBCARD) for remote shutdowns, reboots and more.