The APC Symmetra LX is a modular, scalable rack-mount UPS starting at 4kVA and expandable up to 8kVA, with N+1 redundant power module design meaning it can tolerate a single power-module failure without losing UPS protection — modules can typically be added or replaced without powering down the load. It supports both 220/230/240V and 380/400/415V input configurations. The Symmetra LX line is aimed at growing server rooms and small data centres wanting a UPS that can scale its capacity over time as IT load increases, rather than needing to be replaced outright when initial capacity is outgrown, with the redundancy built in to protect against a single internal fault.