Description
The Vertiv Liebert PSI5-1100MT120N is a high-performance, line-interactive mini tower UPS designed to protect critical IT and network equipment from power disturbances. Delivering 1100VA / 990W of reliable backup power, it features automatic voltage regulation (AVR) with buck and boost technology to stabilize incoming utility power while extending battery life.
This model provides pure sine wave output on battery, making it ideal for sensitive electronics such as servers, network switches, storage devices, VoIP systems, and security equipment. Integrated network connectivity via the included RDU120 network card enables remote monitoring, alerts, and graceful shutdown through standard SNMP and web-based management tools.
With a compact tower form factor, quiet operation, hot-swappable batteries, and programmable outlet groups, the PSI5-1100MT120N is a dependable power protection solution for network closets, branch offices, and edge IT deployments.
| Specification | Details |
|---|---|
| Manufacturer | Vertiv |
| Brand | Liebert |
| Series | PSI5 |
| Model | PSI5-1100MT120N |
| Form Factor | Mini Tower |
| UPS Topology | Line-Interactive |
| Power Capacity | 1100 VA / 990 W |
| Input Voltage | 100 / 110 / 115 / 120 / 125 VAC |
| Output Voltage (On Battery) | User-selectable, pure sine wave |
| Output Frequency | 60 Hz ±1% |
| Automatic Voltage Regulation (AVR) | Buck and Boost |
| Transfer Time | 4–6 ms typical |
| Battery Type | Valve-Regulated Lead-Acid (VRLA) |
| Recharge Time | Up to 6–8 hours to 90% |
| Output Receptacles | NEMA 5-15R |
| Communications | USB, Ethernet (RDU120 Network Card) |
| Network Management | SNMP and web-based monitoring |
| Outlet Groups | Programmable outlet group |
| Audible Noise | < 45 dB (line mode) |
| Operating Temperature | 32°F to 104°F (0°C to 40°C) |
| Certifications | UL 1778, FCC Class B |
| Color | Black |
Payment & Security
Your payment information is processed securely, and we do not store credit card details or access your credit card information.
Return Policy (Short Summary)
We offer a 30-day return window for most unopened, factory-sealed items.
Returns must be authorized before shipping back and must include all original packaging and accessories. Opened or used items are not returnable unless defective.
Some products—such as custom orders, special-order items, audio gear, software, and LED video walls—are non-returnable. Non-defective returns may be subject to a 20–30% restocking fee, and customers are responsible for return shipping costs.
For damaged or incorrect items, please contact us immediately.
From Scope to Sign-Off
A structured delivery process designed to reduce risk and keep projects moving.
Plan
Discovery, site review, requirements gathering, and project alignment. We define scope, constraints, and success criteria before any design work begins.
- Discovery calls & stakeholder interviews
- On-site survey & infrastructure review
- Requirements & use-case documentation
- Project scope, timeline & milestone alignment
Engineer
System design, schematics, signal flow, BOM development, and documentation. Every project leaves this phase with a complete engineering package.
- AV system design & signal flow diagrams
- Equipment selection & BOM development
- Rack layout & control system design
- As-built documentation package
Deploy
Procurement, logistics, installation, programming, commissioning, and training. We own the delivery from first shipment to final handoff.
- Authorized procurement & logistics coordination
- Physical installation & cable management
- Control system programming & configuration
- Commissioning, testing & end-user training
Support
Monitoring, maintenance, lifecycle planning, and long-term service agreements. We stay engaged long after project close.
- 24/7 remote system monitoring
- Preventive & reactive maintenance
- Technology lifecycle & refresh planning
- Long-term service level agreements
A decade of delivery — trusted by 275+ clients across industries
