Vertiv PSI5-1500SRT2UXLI Lithium-Ion 1500VA 2U Rack/Tower UPS
Overview
The PSI5-1500SRT2UXLI is a 1500VA/1350W line-interactive UPS from the Vertiv Liebert PSI5 Lithium-Ion series, purpose-built for edge computing closets, distributed IT nodes, and security infrastructure racks where depth is a constraint. At 11.81 inches deep, this 2U unit fits shallow wall-mount cabinets and 2-post open-frame racks that standard-depth UPS units simply won't clear. The LiFePO4 lithium-ion chemistry is the practical reason to spec this over a comparably priced VRLA unit: expect a roughly 50% longer service life, a dramatically smaller footprint by weight (20.5 lbs vs. 40+ lbs for lead-acid equivalents), and a hot-swappable battery that won't force a maintenance window. Pure sine wave output at 98.4% efficiency means clean power delivery to sensitive network equipment, NVRs, and access control panels — not the stepped approximation that can cause power supply instability in modern switching PSUs. Runtime is 20 minutes at half load and 9 minutes at full — plan accordingly for multi-camera NVR loads versus lightweight edge switch deployments. The gravity-sensing LCD rotates display orientation automatically between rack and tower install positions.
Compatibility
The PSI5-1500SRT2UXLI supplies eight NEMA 5-15R outlets with a NEMA 5-15P input cord, matching standard 120VAC North American branch circuits. Output voltage is selectable among 100, 110, 115, and 125VAC to match equipment requirements. Three programmable outlet groups allow sequenced shutdown or load shedding across connected devices — useful in NVR-plus-switch-plus-access-control rack builds where boot order matters. Network management is available via optional network management Intellislot card (sold separately), enabling SNMP integration with VMS platforms and IT monitoring systems. The EPO (Emergency Power Off) connector supports integration with building management or fire suppression systems. Compatible with any 120VAC load drawing up to 1350W total; input range of 75–150VAC provides AVR correction across wide utility voltage swings without dropping to battery — an important consideration in older commercial buildings with marginal wiring. Pair with a UPS-compatible rack cabinet for a complete edge power solution. For broader Vertiv power infrastructure options including higher-capacity models, see the full Vertiv catalog. If your deployment requires more runtime or higher wattage, consider a higher-capacity variant in the Liebert PSI5 family.
Installation Notes
Mounts in 2U of rack space in standard 19-inch 2-post or 4-post racks, or wall-mount using the included bracket hardware. The 11.81-inch depth fits wall-mount enclosures with as little as 12 inches of usable interior depth. Operating temperature range is 32°–104°F (0°–40°C) — do not install in unventilated outdoor enclosures or locations that exceed this range during summer peaks. USB connectivity supports runtime monitoring and graceful shutdown via compatible UPS management software. Battery is hot-swappable; replacement does not require powering down connected equipment. Meets UL 1778 5th Edition, UL1973 3rd Edition, and CSA C22.2 107.3-14 — verify AHJ acceptance for your jurisdiction before installation in life-safety-adjacent applications.
