The VDC-XE is suited for high power applications such as data centers, health care facilities, and other mission-critical operations that may require up to 30 to 40 s of back-up power. This extended run time will allow several stand-by engine generators to start and synchronize and allow the VDC-XE to transfer to the generators upon a utility power outage. Featuring a 20-year life without a major service interval, the enhanced VDC-XE unit‘s power electronics and high-speed rotor design provide significantly improved power density and run time.