Sustain critical desktop and edge equipment through outages with the Vertiv Liebert PSI5 1500VA tower UPS. Built for environments that cannot tolerate abrupt power loss, it delivers 1,440 W of output capacity and pure sine wave power on battery to support sensitive electronics, active PFC power supplies, and network-connected systems. This model is sized for higher-density desktop protection, giving you more usable wattage than lower-tier units that are rated by VA alone. That matters when the load includes modern servers, storage, switches, and workstation-class systems that draw real power, not just apparent power. The tower form factor fits cleanly beside a desk, under a counter, or in a small equipment area where rack space is not available. The PSI5 1500VA is a practical choice for teams that want stronger runtime and cleaner output without moving to a full rack UPS. It is designed to bridge brief utility interruptions, reduce downtime risk, and preserve orderly shutdowns during longer events. For branch offices, retail back rooms, and distributed IT closets, it provides the kind of power protection that justifies the step up from entry-level desktop UPS models.