Tripp lite smart online su6000rt3uhv on line double conversion ups protects server networking or telecommunications equipment from blackouts voltage fluctuations and surges in a compact towerrackmount housing in rack configuration power module and battery pack occupy only 3 rack spaces each 6u total upright tower placement of entire system supported with included tower stands large capacity 6000va4200 watt power module converts raw input ac to dc and then back to perfect sine wave ac