Keep critical infrastructure running through power disturbances with a modular online UPS designed for dense, high-availability environments. The APC Smart-UPS Modular Ultra 10 delivers 10 kW of output in a 9U rackmount design, giving you serious power density without giving up serviceability or control. Built for environments that outgrow fixed-capacity UPS platforms, this model scales to 20 kW with N+1 redundancy, so capacity can expand as rack loads increase. That matters when the cost of downtime is measured in application interruptions, failed transactions, or delayed recovery windows. The online topology conditions power continuously, while the touchscreen interface and network management card give operations teams the visibility they expect in a premium infrastructure layer. For enterprise buyers, the value is in the architecture: modular capacity, redundant headroom, and a compact rack footprint that fits modern data center planning. It is the kind of UPS you specify when uptime, service access, and future expansion all need to be solved at once.