The densest, most power packed UPS available - offering HP customers more watts per U than any other UPS - allowing for more valuable rack space to be utilized by all your server, storage and networking equipment. The leading edge HP UPS R5500 Uninterruptible Power System features a slim 3U rack-mount design, offering up to 4500 Watts of true power (5400 watts international). This new rack-space saving design allows more support for critical rack mountable equipment. This product brings unprecedented power density and innovative features to the proven HP family of rack-mountable UPS products. The UPS R5500 is a high power density solution, designed for customers who want to provide power protection in space-constrained rack enterprise environments.