Vertiv Liebert PSI5 UPS - 1500VA/1350W 120V | 2U Tower/Rack, Line-Interactive AVR

The Vertiv Liebert PSI5 UPS delivers reliable, cost-effective power protection for your school, home, or office setup. With a robust 1500VA/1350W capacity and a compact 2U form factor, this line-interactive AVR UPS safeguards your equipment from outages, brownouts, sags, surges, and electrical noise. Its flexible tower or rack-mount design fits neatly into compact workspaces, classrooms, small data closets, or under-desk setups, ensuring critical devices stay powered when the grid falters. The PSI5 is built to extend the life of your electronics, protect sensitive data, and minimize downtime in everyday environments where dependable power matters most.

• Power protection with 1500 VA / 1350 W capacity enables backup for a workstation, small server, and essential peripherals during outages. It supports multiple devices while preserving data integrity and minimizing downtime.
• Line-Interactive AVR technology maintains stable 120V output by actively regulating voltage during brownouts and surges, reducing stress on connected hardware and preserving lifetime of sensitive electronics.
• 2U form factor supports rack-mount or tower installation, enabling flexible deployment in compact spaces such as under desks, in office closets, or inside IT racks without compromising accessibility or cooling.
• Battery-backed and surge-only outlet configurations let you prioritize critical devices for power during an outage while conserving battery life and enabling graceful shutdown of nonessential equipment.
• Comprehensive management options include USB and Serial connectivity, real-time monitoring, and compatibility with Liebert monitoring tools to enable proactive alerts, remote administration, and automated shutdown policies for business continuity.

Technical Details of Vertiv Liebert PSI5 UPS

• Model: Liebert PSI5 UPS, 1500VA / 1350W
• Topology: Line-Interactive AVR (Automatic Voltage Regulation)
• Output: 120V nominal
• Form factor: 2U rack-mountable and tower-compatible
• Input voltage range: 88–144 VAC (typical for 120V systems)
• Protection: Surge protection, voltage regulation, overload protection
• Transfer time: Typically under 6 milliseconds
• Battery: Replaceable Sealed Lead-Acid (VRLA) battery cartridge
• Battery recharge time: Approximately 4–6 hours to full recharge after discharge
• Communication ports: USB and Serial; optional network management interface
• Outlet configuration: Multiple outlets with a mix of battery-backed and surge-only protection for critical devices
• Operating environment: Suitable for desktop, office, and light server room applications
• Certifications: UL, CE listed; recognized by major electrical safety standards
• Efficiency and noise: Energy-efficient operation in normal mode with low audible noise during operation

How to install Vertiv Liebert PSI5 UPS

Installing the PSI5 is straightforward and designed for quick deployment in both rack and tower configurations. Follow these steps to ensure reliable protection and performance from day one:

• Choose a well-ventilated, clean location with easy access to outlets and your connected devices. Avoid placement in damp areas or spaces with restricted airflow that could cause heat buildup.
• Mount the UPS in a rack or place it on a stable, level surface. If rack-mounting, insert into a 2U rack space and secure per standard rack installation practices. Maintain adequate clearance around the unit for cooling and cable management.
• Connect the UPS to mains power using the included power cord. Verify that the local power supply matches the UPS’s 120V nominal rating and that the input range falls within the recommended specification.
• Plug critical devices into the UPS’s battery-backed outlets to ensure continuous operation during outages. Non-critical equipment can use surge-only outlets if available, helping to manage energy use and preserve battery life for essential gear.
• Establish communications with a computer or management system using the USB or Serial port and install the Liebert monitoring software or drivers. Configure automatic shutdown, energy monitoring, and alert notifications so you receive timely information about battery status, load, and runtime estimates.
• Run a preventive test by simulating a power interruption to confirm correct operation. Observe the UPS status indicators or software dashboard to verify that equipment remains powered and that battery discharge, alerts, and shutdown sequences function as intended.
• Schedule periodic maintenance checks, including battery health assessments and firmware updates if available. Replace the battery according to the manufacturer’s guidelines to maintain peak performance and runtime reliability.

Frequently asked questions

• What does 1500VA / 1350W mean for my setup? The VA rating indicates maximum apparent power the UPS can deliver, while the watt rating reflects continuous real power available to load. Choose a unit with headroom above the combined wattage of your critical devices to ensure reliable operation during outages and transitions.
• Does the Liebert PSI5 provide voltage regulation during brownouts or surges? Yes. The Line-Interactive AVR technology actively regulates voltage to keep output within safe ranges, protecting sensitive electronics without unnecessarily depleting the battery.
• Can the PSI5 be mounted in a rack and used as a tower? Yes. The PSI5 is designed as a 2U rack-mountable unit that can be configured as a tower for flexible deployment in deskside, closet, or rack environments.
• What ports are included for management? The UPS typically includes USB and Serial ports for local management and monitoring. Depending on the model or region, an optional network management interface may be available for remote monitoring across a facility.
• What is the expected runtime at typical loads? Runtime depends on load and battery condition. At moderate loads (roughly 50% of rated capacity), you can expect several minutes of runtime to perform a safe shutdown. Higher loads shorten runtime. Regular battery maintenance helps preserve runtime and reliability.