Keep essential infrastructure running through brief outages and unstable power with the Vertiv Liebert PSI5 1500VA rack-tower UPS. Built for 120 VAC environments, it delivers 1,500 VA / 1,350 W of capacity in a 2U form factor that installs cleanly in a rack or stands in a tower orientation. This model is a strong fit for IT teams protecting servers, switches, storage, and branch equipment where uptime matters more than basic surge protection. The 4-minute standby time gives systems enough runway for orderly shutdowns or short ride-through events, reducing the risk of data loss and service interruption. Multiple input voltage compatibility across 100 V AC, 110 V AC, 115 V AC, 120 V AC, and 125 V AC adds deployment flexibility in mixed environments. Outlet support includes 4 x NEMA 5-15R and 2 x NEMA 5-20R connections, giving you the right mix for standard and higher-draw equipment. For infrastructure teams that want a compact UPS with serious output capacity and a rack-friendly footprint, the PSI5 1500VA is designed to protect more than power — it protects continuity.