Vertiv PSI5-1500RT120LIN 1500VA Lithium-Ion Rack UPS with RDU120 Network Card
Overview
The Vertiv PSI5-1500RT120LIN is a 1500VA / 1350W 2U rack-mount line-interactive UPS designed for environments where battery longevity, fast recharge, and remote management matter more than raw runtime. The distinguishing feature of this model over the base PSI5-1500RT120LI is the factory-installed RDU120 network management card — it arrives ready for SNMP and web-based monitoring without requiring a separate card purchase or slot installation. If you're deploying a rack that will be monitored remotely — a remote site, a wiring closet, or a secondary server room — this variant saves you a step and ensures management capability is present from day one.
Line-interactive topology with automatic voltage regulation (AVR) means the PSI5-1500RT120LIN conditions incoming power continuously, correcting sags and swells between 75V and 146VAC without switching to battery. In environments with chronic undervoltage or overvoltage — common in older commercial buildings or locations fed by long branch circuits — this protects connected equipment without shortening battery life through unnecessary discharge cycles. The unit only inverts to battery for genuine power failures or waveform events AVR cannot correct.
Key Features
- 1500VA / 1350W Lithium-Ion Battery: Lithium-ion chemistry charges to 80% in roughly two hours versus four or more for traditional VRLA — a critical advantage in environments that cycle through frequent outages or need rapid recovery after a test discharge. Li-ion also delivers a longer service life: typically five to ten years versus three to five for lead-acid, reducing replacement labor in hard-to-access rack locations.
- 98.6% Efficiency in Normal Mode: The PSI5-1500RT120LIN operates at up to 98.6% efficiency under line-interactive mode, which translates directly to lower heat output and reduced electrical draw on the branch circuit. In a rack with six to eight UPS units, that efficiency delta versus older 92–94% designs meaningfully reduces cooling load and operating cost over a three-year cycle.
- Wide Input Voltage Window (75–146VAC): A 71-volt operating window lets the AVR stage handle extreme sags without inverting to battery. This is the spec that determines whether your UPS extends battery life in real-world conditions or burns through cycles on every brown-out event. Sites with unreliable utility power — retail locations, remote offices, industrial facilities — benefit most from this range.
- Six NEMA 5-15R Output Receptacles: Six standard outlets accommodate the mixed-load density typical of a 2U rack footprint: servers, switches, patch panels, and IP cameras drawing 1U equipment loads. The NEMA 5-15P input plug connects to standard 120VAC 15A circuits — no dedicated outlet or PDU required for installation.
- User-Configurable Output Voltage: Output can be set to 100, 110, 115, 120, or 125VAC, allowing the unit to serve equipment with tighter input tolerances or to compensate for branch circuit voltage drop. This is a practical feature when deploying in older facilities where measured outlet voltage deviates from nominal.
- Factory-Installed RDU120 Network Card: Remote monitoring, shutdown scripting, and SNMP integration are available out of the box. This matters for unmanned sites where a silent power event would otherwise go unnoticed until equipment fails. The RDU120 enables proactive battery health reporting and scheduled self-tests without physical access to the rack.
- 2U Rackmount Form Factor (3.38 in H × 17.24 in W × 16.18 in D): At 16.18 inches deep, the PSI5-1500RT120LIN fits standard 4-post racks without requiring a deep-cabinet exception. Weight is 28.4 lbs — manageable for a two-person rack installation without a lift assist.
- Operating Temperature to 40°C: Rated for operation up to 40°C, the unit tolerates the elevated ambient temperatures common in telecom closets and edge deployments where dedicated cooling is limited or unreliable.
- UL 1778 and c-UL-us Listed, FCC Part 15 Class B: UL 1778 is the UPS safety standard required by most commercial facility managers and AHJs. FCC Part 15 Class B limits EMI emissions to levels safe for office and light commercial environments, avoiding interference with nearby wireless equipment.
Integration and Compatibility
The PSI5-1500RT120LIN fits into any rack environment drawing on a standard 120VAC 15A branch circuit. The NEMA 5-15P plug connects directly without adapters. Six 5-15R outlets serve standard ITE equipment; the unit does not include twist-lock outlets, so loads requiring L5-15R connections require an adapter or should be evaluated against the 3000VA variants in the PSI5 family that include twist-lock receptacles. Output voltage configurability (100–125VAC) enables the unit to serve international equipment operating on 100V or 110V nominal when deployed in North American racks.
The factory RDU120 card integrates with Vertiv's monitoring ecosystem and supports standard SNMP traps, making it compatible with most enterprise NMS platforms without vendor-specific software. For PoE switch and IP camera rack deployments, the RDU120 enables automated graceful shutdown scripting that protects NVR recording integrity during extended outages. Pair with a compatible NVR for a complete protected recording infrastructure.
For guidance on sizing UPS capacity to camera and NVR load, consult the UPS and power planning guide. For the broader Vertiv UPS and power management catalog, including extended battery modules and larger PSI5 family members, the full line is available for comparison.
Frequently Asked Questions
Q: What is the difference between the PSI5-1500RT120LIN and the PSI5-1500RT120LI?
A: The PSI5-1500RT120LIN includes a factory-installed RDU120 network management card. The base PSI5-1500RT120LI does not include the card. Both share identical power, battery, and mechanical specifications: 1500VA / 1350W, 98.6% efficiency, 6 × NEMA 5-15R outlets, and 28.4 lbs in a 2U rack enclosure.
Q: Does the PSI5-1500RT120LIN support extended battery modules?
A: The source evidence does not confirm extended battery module compatibility for this specific model. Consult Vertiv's PSI5 accessory documentation to verify EBM support before planning for extended runtime.
Q: What input circuit does the PSI5-1500RT120LIN require?
A: The unit uses a NEMA 5-15P input plug and connects to a standard 120VAC 15A branch circuit. No dedicated outlet, PDU, or hardwired connection is required.
Q: What is the operating temperature range for the PSI5-1500RT120LIN?
A: The unit is rated for operation up to 40°C, making it suitable for telecom closets and edge rack environments where ambient temperatures can exceed typical data center norms.
Q: Can the PSI5-1500RT120LIN output voltage be adjusted?
A: Yes. Output voltage is user-configurable to 100, 110, 115, 120, or 125VAC, allowing the unit to serve equipment with narrower input tolerances or to compensate for voltage drop on long branch circuits.
Q: What safety certifications does the PSI5-1500RT120LIN carry?
A: The unit is UL 1778 Listed and c-UL-us Listed, meeting the UPS safety standard required by most commercial facility managers and AHJs. It also carries FCC Part 15 Class B certification for EMI emissions.
The detail I keep coming back to on the PSI5-1500RT120LIN is the 98.6% efficiency figure in normal mode — that is genuinely high for a line-interactive unit at this price tier, and it has real consequences in a dense rack. When you're protecting twelve camera feeds, a PoE switch, and an NVR in a single 2U slot, the difference between 93% and 98.6% efficiency shows up as measurable heat reduction and lower monthly draw on the branch circuit. Over a three-year run, it adds up.
Technical Highlights:
- 98.6% Normal-Mode Efficiency: Less than 1.4% of input power lost as heat in steady-state operation — directly reduces thermal load in enclosed wiring closets where cooling capacity is constrained.
- 75–146VAC Input Window: A 71-volt swing handled by AVR without inverting to battery. Sites on weak utility feeds or long secondary circuits can run through sags that would burn through VRLA cycles in minutes on narrower-window designs.
- Factory RDU120 Network Card: Arrives ready for SNMP integration and remote shutdown scripting — no post-install card purchase, no slot hunting, no firmware compatibility questions. For unmanned edge sites, this is not optional equipment.
Deployment Considerations:
- The 5-15P input plug is rated for a 15A branch circuit. If your rack load approaches 1350W continuously, verify the branch circuit is dedicated and not shared with other loads — 1350W on a 15A / 1800W circuit leaves minimal headroom for inrush.
- At 16.18 inches deep and 28.4 lbs, verify your rack's usable depth and weight rating before ordering — some wall-mount and short-depth enclosures will not fit this unit without a shelf extension.
The PSI5-1500RT120LIN is the right unit for a remote surveillance rack — NVR, PoE switch, and IP camera infrastructure — where you need the RDU120 to monitor battery health and trigger graceful NVR shutdown remotely, and where lithium-ion's fast recharge cycle matters because the site may cycle through outages without on-site battery service capability.
