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Rectangular mini-tower UPS in dark finish, front panel with status display and power button

Vertiv

Vertiv PSI5-1100MT120 UPS 1100 VA 990W 120V

SKU CH-E5V4-SVCV6 MPN PSI5-1100MT120

Provides 1100 VA line-interactive backup with automatic voltage regulation and five NEMA 5-15R outlets

  • Voltage version120 V
  • AC input voltage75-146VAC
  • Input line frequency55-65 Hz (57-63 Hz Battery to Normal comeback)
  • Power inputNEMA 5-15P
  • Volt-ampere rating1100 VA
  • Power rating990 W

Model PSI5-1100MT120

  • AVR corrects power disturbances from 83 to 159 VAC without battery use
  • 9 power factor delivers 990 W usable output from 1100 VA rating
  • Plug-and-play mini-tower needs no rack space or installation
  • Two programmable outlets prioritise critical loads during outages
  • Optional communication card enables remote monitoring of up to 50 UPS units

Plug-and-play 1100 VA mini-tower

The Vertiv PSI5-1100MT120 is a line-interactive UPS rated at 1100 VA and 990 W with a 0.9 output power factor. It connects through a NEMA 5-15P plug and provides five NEMA 5-15R outlets for desktop workstations, network gear or point-of-sale systems. No rack space or professional installation is required.

990 W with AVR headroom

Automatic Voltage Regulation corrects sags and swells from 83 to 159 VAC without drawing battery power. The unit accepts an input range of 75 to 146 VAC at 55 to 65 Hz and transfers to battery in under 6 milliseconds. At full 990 W load the battery will deplete faster than at lighter loads; the internal VRLA pack needs 6 to 8 hours to regain 90 % capacity after a discharge.

Two programmable outlets and optional remote card

Two of the five outlets can be programmed to shed non-critical loads during extended outages, preserving runtime for essential equipment. A USB port supports local monitoring, while an optional Vertiv Liebert Unity communication card enables remote oversight of up to 50 UPS units through the free Vertiv Trellis Power Insight application. Surge protection meets ANSI C62.41 Category A Level 3 at 1372 J.

How it compares

Measured against everything we stock in Uninterruptible Power Supplies (UPS), at today’s prices. Recalculated every night.

Price $475.99
Cheaper than about 67% of the 1,153 comparable items (median $948.99).

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Specifications

Product
Brand nameLiebert
Product linePSI5
Model namePSI5-1100MT120
Ports & slots
Communication portsUSB
Power
Voltage version120 V
AC input voltage75-146VAC
Input line frequency55-65 Hz (57-63 Hz Battery to Normal comeback)
Power inputNEMA 5-15P
Volt-ampere rating1100 VA
Power rating990 W
Voltage output120VAC (100/110/115/125VAC user-configurable)
Power outlets5
Battery typeValve Regulated Lead Acid (VRLA)
Battery charge time6-8 h to recover 90%
Built-in protectionElectronic (over current, short circuit w/ latching shutdown)
Size & build
Rack mountingMini Tower
Product dimensions5.7 in × 14.8 in × 8.7 in
Product weight26 lb (11.8 kg)
Shipping weight15.00 kg
Package size483 × 330 × 229 mm
Environment & compliance
Regulatory approvalsUL 1778, c-UL-us Listed
Temperature rangeOperating Temperature, ° F (° C) 32-104 (0-40)
Storage Temperature °F (°C)-5- 122 (-15- 50)
Humidity range20% to 90% non-condensing
More details
Surge protectionANSI C62.41, Category A, Level 3 1372 J

Other versions of this model

5 more in the same range

Questions about this item

Will the PSI5-1100MT120 protect my older PC that has a standard ATX power supply?

Yes. The UPS delivers pure sine wave output at 120 VAC, which is compatible with active PFC and older ATX power supplies. Its AVR corrects sags from 83 to 159 VAC without using the battery, so your PC stays powered during brownouts.

How can I confirm the UPS is regulating voltage and communicating with my server after I plug it in?

Connect the USB port to your server and install the Vertiv monitoring software. The software will display real-time input voltage, output voltage, load percentage and battery status, proving AVR is active and the link is working.

What cables and accessories come in the box, and what must I buy separately for remote monitoring?

The box includes the UPS, a USB cable and a NEMA 5-15P input cord. The five NEMA 5-15R outlets are built in. For remote monitoring you must purchase a Vertiv Liebert Unity communication card separately.

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