Tripp Lite SmartOnline SU12KRT4UHW 12,000VA / 12Kva / 10,800 watt online, double-conversion UPS system offers complete power protection for critical server, network and telecommunications equipment in an 8U rack/tower configuration. This system delivers complete N+1 redundancy when used at loads up to 6kVA, and non-redundant operation at loads between 6 and 12kVA. Fault-tolerant auto-bypass prevents unexpected service interruptions during UPS overload or internal fault conditions. Included parallel PDU with manual bypass switching enables hot-swappable replacement of all major UPS system components in both N+1 and combined operating modes. Enhanced availability, fault tolerance and simple hot-swap replacement options make this UPS ideal for advanced networking applications in data centers, computer rooms, network closets and rugged industrial locations.
Tripp Lite SmartOnline SU12KRT4UHW Features,

Tripp Lite SU12KRT4UHW 12kVA, 12,000VA / 10,800 watt on-line, double-conversion UPS system in 8U total rack/tower configuration
Hardwire input and output connections
Maintains sine wave output within 2% of selectable 200/208/220/230/240V nominal
Supports 50/60Hz operation for worldwide frequency compatibility
Expandable runtime with optional external battery packs
Some external battery configurations require the use of Tripp Lite’s External Battery Configuration Software (see manual)
Intelligent battery management system with temperature-compensated charging extends battery life
Battery independent restart
Highly efficient economy mode option
Optional RELAYIOMINI interface modules available (requires removal of USB interface module)
HID-compliant USB interface enables integration with built-in power management and auto shutdown features of Windows and Mac OS X
Optional 2POSTRMKITHD supports installation in 2 post 19 inch racks (2 required)
Optional 2-9USTAND supports upright tower placement (1 required)
Supports Emergency Power Off (EPO) via built-in interface
Front panel LEDs and LCD readout with scroll controls
LED / LCD display panel rotates for viewing in rackmount or tower configurations
External battery packs are field replaceable and hot swappable
Included Parallel PDU with manual bypass switch enables hot-swap replacement of power modules at any supported load level
Applications utilizing the optional network communications card require two SNMPWEBCARD accessories (install one per included power module)
Unique configuration offers 12kVA non-redundant operation and automatic N+1 redundancy at load levels of 6kVA and under
Compatible with Tripp Lite UPS management card options TLNETCARD, WEBCARDLX, SNMPWEBCARD, MODBUSCARD and RELAYIOCARD