Smart-UPS On-Line provides high-density, double-conversion, online power protection for servers, voice / data networks, medical labs, and light industrial applications. The Smart-UPS On-Line is capable of supporting high loads. The device features unity output power factor enabling it to support power-hungry blade servers or heavily loaded equipment racks. When business-critical systems require runtime in hours, not minutes, Smart-UPS On-Line can be configured with multiple battery packs to meet aggressive runtime demands. The UPS includes an integrated network management card for remote management. The Smart-UPS On-Line provides value to customers with demanding power conditions, including a very wide input voltage window, extremely tight output voltage regulation, frequency regulation, internal bypass, and input power factor correction.