Description
The Vertiv Liebert PSI5-1000RM1201UN is a high-performance line-interactive UPS designed to protect critical IT and network equipment in space-constrained rack environments. Delivering 1000VA / 900W of reliable power, this 1U rackmount UPS features automatic voltage regulation (AVR) and pure sine wave output to ensure consistent, clean power during outages and voltage fluctuations.
This model includes an integrated network management card, enabling remote monitoring and control via SNMP or web interface. With fast transfer times, hot-swappable batteries, and programmable outlet groups, the PSI5 provides dependable uptime for servers, network switches, storage devices, and edge infrastructure. Its high efficiency and compact 1U form factor make it ideal for network closets, small data centers, and distributed IT deployments.
| Specification | Details |
|---|---|
| Manufacturer | Vertiv |
| Product Line | Liebert PSI5 |
| Model Number | PSI5-1000RM1201UN |
| UPS Type | Line-Interactive |
| Form Factor | 1U Rackmount |
| Power Capacity | 1000 VA / 900 W |
| Input Voltage | 120 VAC |
| Output Voltage | Selectable 100 / 110 / 115 / 120 / 125 VAC |
| Output Waveform | Pure Sine Wave |
| Automatic Voltage Regulation (AVR) | Yes (Buck/Boost) |
| Transfer Time | 4–6 ms typical |
| Output Receptacles | NEMA 5-15R (battery-backed) |
| Network Management | Integrated SNMP/Web Network Card |
| Battery Type | Valve-Regulated Lead-Acid (VRLA) |
| Battery Recharge Time | Approx. 6 hours to 90% |
| Hot-Swappable Batteries | Yes |
| Programmable Outlets | Yes |
| Dimensions (W x D x H) | 17.2 x 20.1 x 1.7 in (438 x 511 x 44 mm) |
| Weight | Approx. 36.4 lb (16.5 kg) |
| Operating Temperature | 32°F to 104°F (0°C to 40°C) |
| Certifications | UL, c-UL-us, FCC Class B |
| Typical Applications | Servers, network closets, switches, storage |
Payment & Security
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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
