. APC award-winning Smart-UPS® is the most popular UPS in the world for servers storage & network power protection. Trusted to protect critical data & equipment from power problems by supplying clean & reliable network-grade power. In addition to legendary reliability & manageability Smart-UPS have extremely high efficiency at low medium & high load levels making them ideal for todays multi-core or virtualized servers that have varying load consumption. Available in a variety of form factors (tower rack mount rack/tower convertible) there is a model for every application & budget. Rack mounted Smart-UPS are ideal for powering Blade or density optimized servers in a distributed power protection environment as the primary or redundant protection. Smart-UPS® models have long been considered the benchmark for all network & server UPSs. Smart-UPS feature a 16-segment LED display extended range automatic voltage regulation (AVR) & pure sine wave output on battery. Additional manageability options are available through the Smart-Slot interface which is an internal slot for the installation of optional accessory cards. The extended run Smart-UPS XL has the capability to add external battery packs to scale runtime from minutes to hours typically needed for converged voice & data network power protection. The entry level Smart-UPS SC is an economical choice for small & medium businesses looking to protect small switches networking devices & point-of-sale (POS) equipment..