Attach the device to an emergency power off (EPO) system so that power can be turned off in an emergency situation. Green mode bypasses unused electrical components in good power conditions to achieve very high operating efficiency without sacrificing any protection. High frequency design reduces or eliminates bulky transformers resulting in lighter units for ease of handling. Energy meter provides actual kilowatt hours of usage for energy conscious users. Intuitive LCD interface provides clear and accurate information with the ability to configure the UPS locally with easy to use navigation keys. UPS recognizes when external battery packs are attached and automatically adjusts runtime. Multiple outlet groups may be controlled separately from the UPS for discrete reboot of hung devices, sequenced on / off and non-critical load shedding.