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

Maintain critical edge systems through brief outages with the Vertiv Liebert PSI5 Lithium 800VA UPS. Its short-depth 2U rack/tower design fits shallow cabinets and mixed deployment environments where standard-depth hardware is not practical. The lithium battery platform is a strong fit for teams that want fewer battery replacements and a lower-maintenance power layer over the life of the unit. This model is built for 120V installations and is suited to protecting network gear, small servers, storage, and other essential electronics that cannot tolerate unexpected power loss. The rack/tower flexibility makes it easier to standardize across branch sites, telecom closets, and distributed IT rooms without redesigning the space around the UPS. For procurement teams, the value is in the combination of compact footprint, lithium battery technology, and Vertiv’s enterprise power pedigree. It is a practical choice when uptime matters, rack depth is limited, and battery service intervals need to stay predictable. The included RDU120 accessory adds deployment value for teams that want clearer visibility into UPS status in the field.