MGE last week announced two uninterruptible power supplies for protecting small business and home networks.The Nova AVR 600 and 1100VA are line-interactive UPSes that can be remotely managed from a Web browser or via the Simple Network Management Protocol.Line-interactive UPSes use an inverter\/converter to replace the battery charger, inverter and source selection switch. The inverter\/converter charges the battery and converts power from DC to AC. When power is available, the inverter\/converter charges the battery; if the power fails, the battery provides the power to the server or workstation. An offline UPS is more commonly used with low-end gear - when power fails, the UPS detects the lack of power and connects the battery.MGE also includes a Network Management Proxy agent with the AVR 600 and 1100VA. The UPSes include a USB port for management.From the network management software, users can monitor power availability, battery capacity and automatic system shutdown.The Nova AVR UPSes feature automatic voltage regulation (AVR), which provides a wide tolerance to power fluctuations and protects against power surges. Their line-interactive nature also reduces voltage fluctuations, thus saving battery capacity during power surges or brownouts.The UPSes have enough battery power to keep a PC running for 15 to 45 minutes, allowing users sufficient time to power down their systems in prolonged power failures.Because charging is controlled by a microprocessor, battery life can be extended by as much as 50%. Management software gives advanced warning when the batteries need to be replaced.Both UPSes are also compatible with MGE's Personal Solution-Pac software, which performs an orderly shutdown of all applications during a blackout prior to UPS battery depletion.The UPSes work with Windows XP and Mac OS X, as well as Linux. They start at $115 and are available now. They are the same price as offline systems.