This AIMS Power 3000W 24V Rack Mount Inverter is ideal for providing backup power to your essential equipment such as: telecom, audio/visual and computers. It will generate 3000W of high quality pure sine power at a stable 120Vac output. Power is maintained to your equipment seamlessly through a built-in 20A transfer switch with a typical transfer time of less than 20 milliseconds. The transfer switch will bypass city/utility power when it is available, and when city/utility power is lost, the inverter will automatically switch to the backup DC power source. In backup mode, the rack mount inverter will supply power as long as the DC power supply provides enough voltage.