This is a power module for APC's Symmetra PX line of modular, scalable three-phase UPS systems used in data centres — rather than a standalone UPS, it's a hot-swappable capacity/redundancy building block that slots into a Symmetra PX frame. Rated 10kW scalable to 16kW, it lets a data centre add power capacity or N+1 redundancy incrementally as load grows, without needing to replace the whole UPS system. This kind of modular architecture is aimed at facilities engineers and data centre operators managing critical infrastructure uptime, not general office or small-business power protection.