Tripp Lite SU20KRTHWTFASSM 20,000VA / 20kVA / 18,000 watt online, double-conversion UPS system offers complete power protection for critical server, network and telecommunications equipment in a 16U rack/tower configuration pre-assembled into a Tripp Lite 25U rack enclosure. This system delivers complete N+1 redundancy when used at loads up to 50%, and non-redundant operation at loads between 50 and 100%. Fault-tolerant auto-bypass prevents unexpected service interruptions during UPS overload or internal fault conditions. Included parallel PDU with manual bypass switching enables hot-swappable replacement of all major UPS system components in both N+1 and combined operating modes. Enhanced availability, fault tolerance and simple hot-swap replacement options make this UPS ideal for advanced networking applications in data centers, computer rooms, network closets and rugged industrial locations.