Vertiv Liebert PSI5 Lithium 800VA 2U Rack/Tower 120V | Rack Mount UPS

Maintain critical edge infrastructure with a UPS designed for constrained spaces and steady power protection. The Vertiv Liebert PSI5 Lithium 80 delivers 800 VA of backup capacity in a short-depth 2U rack/tower form factor, making it a practical fit for branch closets, network cabinets, and compact server rooms where standard-depth hardware is too large. Lithium battery architecture helps reduce routine battery maintenance compared with traditional sealed lead-acid designs, while the rack/tower convertible chassis gives deployment flexibility across mixed environments. At 120 V, it aligns with common North American IT power requirements and supports smaller loads that still need clean ride-through during outages and brief power events. This model is a strong choice when uptime matters more than raw capacity. It is sized for network gear, edge compute, and storage that must stay available through short interruptions, controlled shutdowns, or generator transfer windows. The short-depth design also helps preserve airflow and service clearance in cabinets where every inch counts. For teams standardizing on compact UPS protection, this Vertiv unit offers a disciplined balance of size, runtime intent, and lithium battery economics. It is the kind of UPS you choose when the rack is full, the footprint is fixed, and downtime is not an option.