Reliability and efficiency have never looked so attractive. The 9155 single-phase Uninterruptible Power System (UPS) delivers a combination of advanced technology, user-friendly design and low price that''s absolutely unmatched by competing products. This innovative design offers high efficiency (90 percent or better across all load ranges), low input current distortion (less than 5 percent total harmonicdistortion, with an active IGBT rectifier that delivers 0.99 power factor correction) and high power factor output (0.9 PF). With advances being made in miniaturization and processing power and more equipment being served by dual-cord power supplies, the challenge of protecting that power, and doing so in a limited space, grows ever greater. Fortunately, advances in technology have also meant that more power protection per square foot can now be provided. The 9155 delivers premium levels of efficiency, reliability and flexibility, all in a sleek tower half the size of most other units on the market today.