Vertiv Liebert PSI5 Lithium-Ion UPS 1500VA/1350W 120V Line Interactive AVR

The Vertiv Liebert PSI5 Lithium-Ion UPS is a purpose-built uninterruptible power supply designed to protect critical equipment in edge and distributed IT environments. Built around lithium-ion technology, this 1500VA / 1350W unit delivers dependable power resilience for servers, networking gear, storage, and edge computing devices. With a 120V line-interactive AVR topology, the PSI5 automatically corrects voltage fluctuations, shielding sensitive electronics from brownouts and surges while preserving precious battery energy for the moments that truly matter. Designed for compact spaces and busy IT operations, it combines reliability, efficiency, and ease of management to help organizations maintain uptime, protect data, and optimize operating costs. Whether you’re safeguarding a micro data center, a remote site, or a high-density workspace, the Liebert PSI5 Lithium-Ion UPS is built to deliver robust performance with minimal footprint and maintenance overhead.

• Advanced lithium-ion power for longer life and lighter weight The PSI5 replaces traditional lead-acid packs with lithium-ion chemistry, offering extended service life, faster recharge, and reduced weight. This translates into less frequent battery replacements, easier installation, and a smaller total cost of ownership over the life of the unit.
• Ample capacity for critical equipment With 1500VA / 1350W capacity, this UPS can support a range of essential devices during outages, including edge servers, network switches, storage arrays, and virtualization appliances. The robust rating provides headroom for multi-device protection and smooth, controlled shutdowns when power is interrupted, helping prevent data loss and equipment damage.
• 120V Line-Interactive AVR protection The automatic voltage regulation (AVR) maintains stable output in the face of voltage sags or surges, reducing wear on connected equipment and extending hardware life. The line-interactive topology provides efficient, responsive protection suitable for typical office, edge, and distributed IT environments without unnecessary energy waste.
• Edge-ready design for space-constrained deployments The compact, rugged form factor is ideal for IT closets, telecom cabinets, or remote sites where space is at a premium. The Liebert PSI5 is optimized for edge computing and distributed IT deployments, delivering reliable performance where uptime is critical and environmental conditions may be less forgiving than a traditional data center.
• Intelligent monitoring and proactive maintenance Built-in diagnostics and status indicators give IT teams visibility into runtime, load, and health of the UPS and its lithium battery. This enables proactive maintenance, reduces unexpected outages, and simplifies operations by providing actionable data through a simple, user-friendly interface.

Technical Details of Vertiv Liebert PSI5 Lithium-Ion UPS 1500VA/1350W 120V Line Interactive AVR

• Capacity 1500VA / 1350W to support essential devices during short outages and brownouts.
• Output Voltage 120 VAC, optimized for common IT and office equipment power requirements.
• Battery Chemistry Lithium-Ion, delivering longer life, faster recharge, and reduced maintenance compared with traditional lead-acid batteries.
• Topology Line-Interactive AVR for automatic voltage regulation to stabilize output during voltage fluctuations.
• Form Factor and Design Compact, space-efficient footprint suitable for edge deployments and distributed IT closets.
• Protection and Reliability Built to guard critical equipment against power disturbances, with robust safety and monitoring features to support uptime and data integrity.

How to install Vertiv Liebert PSI5 Lithium-Ion UPS

Installing the Vertiv Liebert PSI5 Lithium-Ion UPS is straightforward and designed to minimize complexity while delivering maximum uptime. Follow these best-practice steps to ensure a safe, reliable setup that will serve your edge and distributed IT environments well:

• Choose a suitable installation site Select a stable, well-ventilated area away from heat sources and excessive dust. Ensure the surface can support the weight of the UPS and that there is sufficient clearance for airflow and cable access. Position the unit so that the connected equipment is within easy reach to reduce cable strain during maintenance or replacements.
• Connect to a proper power source Use the included power cord to connect the UPS input to a grounded 120V outlet that matches the unit’s specifications. Avoid using extension cords or daisy-chains that could introduce additional impedance or safety risks. Ensure the outlet is on a dedicated circuit if there is a heavy load on the same line.
• Protect connected equipment Plug critical devices into the UPS outputs. Prioritize servers, network gear, and storage devices to be connected directly to the UPS so they receive clean, regulated power during outages or voltage disturbances. Do not exceed the listed 1500VA / 1350W capacity to preserve battery runtime and protection.
• Initial battery conditioning Allow the lithium-ion battery to fully charge before relying on the unit for critical loads. This initial conditioning helps maximize runtime and battery health over the life of the UPS. The first full charging cycle is important for establishing accurate battery capacity and performance metrics.
• Configure monitoring and run a self-test Use the built-in interface or compatible management software to configure alert thresholds, notifications, and shutdown behavior. Run a self-test to verify the UPS and battery health, ensuring that power protection is active and ready to respond to real outages.

Frequently asked questions

• Q: What is the capacity and voltage of the Vertiv Liebert PSI5 Lithium-Ion UPS? A: The system provides 1500VA / 1350W capacity with a 120V output to support critical IT equipment during power disturbances.
• Q: What battery technology does the PSI5 use? A: It uses Lithium-Ion battery technology, offering longer life and faster recharge compared with traditional lead-acid batteries.
• Q: What type of protection does it provide? A: It uses Line-Interactive AVR to regulate voltage and protect connected devices from brownouts, surges, and minor outages, helping to maintain uptime and equipment longevity.
• Q: Is the PSI5 suitable for edge deployments? A: Yes. Its compact, rugged design is optimized for edge computing and distributed IT environments, where space is limited and uptime is critical.
• Q: How do I monitor and maintain the UPS? A: The unit offers built-in diagnostics and status indicators, and is compatible with standard monitoring interfaces to track runtime, load, and battery health for proactive maintenance.