CyberPower UPS selector tool http://eu.cyberpowersystems.com/products/ups_sizing_tool.htm

The Professional Rackmount LCD Series provides advanced level of power protection to mission-critical servers, telecom equipment, VOIP and internet working hardware. Featuring Pure Sinewave output and Automatic Voltage Regulation (AVR), it can stabilize AC signal or deliver seamless power to connected equipment .The Multifunction LCD Readout indicates critical power/battery conditions. The included PowerPanel(r) Business Edition management software provides comprehensive network power management including unattended-shutdown, event logging, reporting, and notifications. The patented GreenPower UPS(tm) technology can reduce energy costs by up to 75% and dissipate 80% less heat than competitive models. An optional SNMP/HTTP Remote Management Capabilities enables remote management of the system through standard web browser. With stands and skids included in package, the unique convertible design allows configuration flexibility in either Tower (T) or Rackmount (RM) form.

Features and Benefits:

2U rack space GreenPower UPS(tm) Technology : Energy-Saving UPS Save upto 75% of electricity Pure Sine Wave output Line-interactive technology Automatic Voltage Regulator (AVR) PowerPanel(r) Business Edition software Multiple outputs for multiple servers Multiple communication interfaces Programmable brownout and over voltage protection Microprocessor based full digital control EMI, RFI, Surge and spike protection Phone/Fax/Modem and DSL/Network protection Scheduled shutdown Auto restart/Auto charge User-replaceable batteries SNMP / HTTP Remote Management Capabilities (optional) RM/T configuration Dual Serial ports and USB connectivity Critical load outlets Metal housing Hot-swappable battery packs Multifunction LCD readout Audible alarms Resettable Circuit Breaker Extended-Runtime (XL) models* Emergency Power-Off (EPO) Port