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Tall black rack-tower UPS cabinet, LCD display front, 49 by 17 by 34 inches

Vertiv

Vertiv Liebert AS4D0NCXGNNXLKB 20 kVA 18 kW 208 V UPS

SKU CH-A6BP-CD94Y MPN AS4D0NCXGNNXLKB

Delivers 20 kVA and 18 kW of double-conversion backup with 10 minutes at full load or 26 minutes at half load in a rack or tower form factor

  • Voltage version208 V
  • AC input voltage200/208/220/230/240 VAC
  • Input line frequency40 Hz to 70 Hz auto-sensing
  • Power input3-Wire (L-L-G)
  • Volt-ampere rating20 kVA
  • Power rating18 kW

Model AS4D0NCXGNNXLKB

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  • 20 kVA capacity supports critical 18 kW loads
  • Online double-conversion topology delivers clean 208 V power
  • Scalable N+1 architecture adds resilience for growing racks
  • Factory-fitted SNMP card enables remote monitoring instantly
  • 10-minute full-load runtime protects equipment during outages

20 kVA 18 kW Scalable UPS

This Vertiv Liebert AS4D0NCXGNNXLKB is a 20 kVA 18 kW online double-conversion UPS that operates at 208 V single-phase input and output. It supports scalable N+1 redundancy within a 20 kVA frame and ships with a factory-installed SNMP Webcard for network management. The unit installs in either rack or tower orientation.

IT facilities needing 208 V single-phase power

This UPS suits data-centre rows, network rooms and critical IT loads that require 208 V single-phase supply with scalable N+1 redundancy and remote monitoring. Sites that need three-phase input, higher kVA ratings or longer battery autonomy at full load should evaluate alternative platforms.

10 minutes full-load battery runtime

At full load the internal VRLA batteries provide 10 minutes of runtime; at half load the runtime extends to 14 minutes. This single figure determines whether the unit meets the hold-up window required by the protected equipment.

How it compares

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

Price $25,438.99
Pricier than about 96% of the 1,153 comparable items (median $948.99).

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Specifications

Product
Brand nameVertiv
Product lineLiebert
Model nameAS4D0NCXGNNXLKB
Power
Voltage version208 V
AC input voltage200/208/220/230/240 VAC
Input line frequency40 Hz to 70 Hz auto-sensing
Power input3-Wire (L-L-G)
Volt-ampere rating20 kVA
Power rating18 kW
AC output frequency60 Hz default; 50/60 Hz user-configurable
Battery typeValve Regulated Lead Acid (VRLA)
Runtime on batteryFull Load: 5 mins.
Half Load: 14 mins.
Size & build
Product dimensions49 in × 17 in × 34 in
Product weight920 lb (417 kg)
Shipping weight417.31 kg
Package size1245 × 1245 × 432 mm
Environment & compliance
Temperature rangeOperating temperature: 32 °F - 104 °F (0 °C - 40 °C)
Humidity range0–95%, non-condensing

Other versions of this model

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Questions about this item

What rack depth and floor capacity are required for the 49" x 17" x 34" 920 lb unit?

The UPS measures 49 inches high, 17 inches wide and 34 inches deep and weighs 920 lbs, so the rack or floor must support that weight and provide at least 34 inches of usable depth.

How do I connect the 3-wire L-L-G input and avoid the common phase-rotation error?

Wire the input as 3-wire line-line-ground at 200/208/220/230/240 VAC; verify phase rotation with a meter before energising because reversed phases will prevent the inverter from starting.

When should the VRLA battery modules be replaced given the 5-minute full-load and 14-minute half-load runtimes?

VRLA modules typically last 3 to 5 years; plan replacement when runtime drops noticeably below the rated 5 minutes at full load or 14 minutes at half load.

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