The IBM 5594-6BX is an uninterruptible power supply that provides rack protection with increased efficiency and powerful management capabilities to safeguard high availability IBM system x, BladeCenter, and Flex server environments. In today's high availability server environments, unplanned power outages or line quality irregularities can have a considerable financial impact on all sized business. The typical utility power is 99.9% available, but that means that there can be almost of 9 hours downtime a year, not to mention brown-outs and other power quality problems.