A rack/tower UPS with line interactive topology, the UltraTech 0E-RCKMT1500 provides battery backup and surge protection for servers, network devices and telecom installations without an active power factor correction (PFC) power supply. The 0E-RCKMT1500 uses Automatic Voltage Regulation (AVR) to correct minor power fluctuations without switching to battery power, which extends battery life, essential in locations with frequent power fluctuations.