Vertiv AS6D0NCXGNNXLKB 20KVA Scalable N+1 Three-Phase UPS
Overview
The Vertiv AS6D0NCXGNNXLKB is a 20kVA/18kW three-phase uninterruptible power supply engineered for data centers, network equipment rooms, and critical infrastructure deployments where downtime is not an option. This unit supports N+1 redundancy — meaning you can add a parallel unit so the system keeps running even if one UPS fails entirely. At 700 lbs and a 38 × 17 × 34-inch footprint, this is a floor-standing, rack-adjacent or standalone installation that belongs in machine rooms with proper structural planning, not a shelf project.
The AS6D0NCXGNNXLKB operates on 208/120VAC input and output with 4-Wire (L-L-N-G) wiring topology, which aligns directly with standard North American commercial electrical infrastructure — no step-down transformers or specialty panels required in most enterprise facilities. If you're protecting a surveillance NVR rack, a network switching closet, or a mid-sized server cluster, this unit handles the load and maintains compatibility with existing building wiring.
Explore the broader Vertiv power protection lineup for complementary products including PDUs, rack cooling, and battery cabinets that integrate with this platform.
Key Features
- 20kVA/18kW N+1 Scalable Capacity: Rated at 20kVA/18kW, this UPS handles real-world mixed loads across large server, NVR, and networking deployments. The N+1 scalability means you can pair a second unit for true redundancy — if one module faults during a grid event, the parallel unit carries the full load without interruption. This is the configuration that data center SLAs are built around.
- 208/120VAC Input and Output: Accepts standard commercial three-phase 208/120VAC input and delivers the same on output, so existing PDUs and equipment wiring don't require reconfiguration. That matters when you're protecting a populated rack that can't tolerate a wiring changeout.
- 4-Wire (L-L-N-G) Wiring: The L-L-N-G topology supports both line-to-line (208V) and line-to-neutral (120V) loads on the same output — meaning you can run 208V server PSUs and 120V network gear off the same UPS without a secondary distribution transformer. That's a real cost and space saving in dense rack environments.
- Up to 92% Efficiency: At 92% efficiency, this unit generates substantially less heat per kW of protected load than older double-conversion designs in the 88–90% range. In a 20kW load scenario, that's roughly 1,600W less heat dumped into your cooling system compared to an 88% unit — a meaningful HVAC cost factor at scale.
- 0°C to 40°C Operating Range: The 0–40°C operating temperature range covers conditioned data center and server room environments comfortably. It's not rated for outdoor or unconditioned industrial spaces — keep it in a climate-controlled room, which is where 20kVA-class power protection belongs anyway.
- 700 lb Footprint — Floor Load Planning Required: At 700 lbs, structural floor loading is a mandatory pre-installation check. Raised-floor data centers typically handle this without issue, but slab-on-grade installations or older buildings with wood-frame subfloors need a structural review before positioning this unit. Plan for a pallet jack or lift gate delivery as well — this does not hand-truck into place.
Integration & Compatibility
The AS6D0NCXGNNXLKB is built around standard North American three-phase commercial power infrastructure. Its 208/120VAC 4-wire configuration integrates directly with most commercial power distribution units and building panels without adapter hardware. For surveillance-specific deployments, this unit can protect large NVR systems and associated PoE switch infrastructure — providing the runtime and load capacity needed to execute a clean graceful shutdown or bridge through short outages on 32- to 64-channel recording setups.
N+1 parallel configuration requires a matching second unit and proper bypass/sync cabling — consult Vertiv's parallel installation requirements before ordering if redundancy is the primary design objective. For facilities planning a multi-UPS deployment, pre-sales engineering consultation is available to validate load calculations and redundancy architecture before equipment is ordered.
If you're also evaluating three-phase UPS options at different capacity points, compare runtime requirements and kVA load totals carefully — oversizing a UPS reduces efficiency; undersizing risks overload during peak draw events like simultaneous NVR writes and switch failovers.
Frequently Asked Questions
Q: What is the difference between the 20kVA and N+1 ratings on the AS6D0NCXGNNXLKB?
A: The 20kVA/18kW is the single-unit power capacity. N+1 refers to a redundancy configuration where a second identical unit is installed in parallel — if one unit fails, the other carries the full load. N+1 is an architecture, not a built-in feature; it requires a second AS6D0NCXGNNXLKB unit and proper parallel wiring.
Q: What input voltage does the AS6D0NCXGNNXLKB require?
A: The unit requires 208/120VAC three-phase input — standard commercial electrical service in North American facilities. It is not designed for single-phase or 240V residential circuits.
Q: How much does the AS6D0NCXGNNXLKB weigh, and what does that mean for installation?
A: The unit weighs 700 lbs. Installation requires a freight lift gate, pallet jack, and a structural floor load assessment before placement. Raised-floor data centers typically accommodate this without modification; slab and older subfloor installations should be reviewed by a structural engineer.
Q: What is the operating temperature range for the AS6D0NCXGNNXLKB?
A: Rated for 0°C to 40°C (32°F to 104°F). This unit is designed for conditioned indoor environments — data centers, equipment rooms, and climate-controlled server closets. It is not suitable for unconditioned outdoor or industrial environments without additional enclosure protection.
Q: Does the AS6D0NCXGNNXLKB support both 208V and 120V loads simultaneously?
A: Yes. The 4-Wire (L-L-N-G) output configuration supports both line-to-line 208V and line-to-neutral 120V loads from the same unit, accommodating mixed server and network equipment without a secondary distribution transformer.
Q: What efficiency rating does the AS6D0NCXGNNXLKB achieve?
A: The unit is rated at up to 92% efficiency. At full 18kW load, this reduces heat output compared to lower-efficiency alternatives — a factor in cooling cost calculations for long-running deployments.
When I look at the AS6D0NCXGNNXLKB, the spec that drives the deployment conversation is the 4-Wire L-L-N-G output topology paired with 20kVA/18kW capacity. Most sites protecting mixed-voltage racks — 208V server PSUs running alongside 120V switches and NVRs — end up adding a small step-down transformer to handle the 120V side. This unit eliminates that entirely, which simplifies the one-line diagram and removes a potential failure point from the protected path.
Technical Highlights:
- 20kVA/18kW Capacity: Handles the full load of a densely populated rack environment — a 32-channel NVR with RAID storage, a 48-port PoE switch, and associated servers can easily approach 8–12kW; this unit has headroom to protect multiple racks or scale into N+1 configuration with a second unit.
- 92% Efficiency: At 18kW continuous load, a 2-point efficiency improvement over an 88% unit translates to roughly 720W less heat — that's real HVAC savings across a 24/7 operational year, and it reduces generator sizing requirements in facilities running on backup power.
- 38 × 17 × 34 in / 700 lbs Form Factor: The 17-inch width aligns with standard rack bay spacing for side-by-side floor placement, but at 700 lbs, you are not repositioning this after installation — get the final placement right before it's delivered to the floor.
Deployment Considerations:
- N+1 redundancy requires procuring and commissioning a second matching unit with proper parallel sync cabling — budget for both units and the associated electrical work if redundancy is a project requirement, not an afterthought.
- The 0–40°C operating range is a ceiling, not a comfort zone — sustained ambient temps above 35°C will stress battery systems in any UPS of this class; verify that your room cooling can maintain the environment under full electrical load before commissioning.
This unit is the right specification for a mid-sized data center pod or a multi-rack security operations infrastructure build — specifically where the electrical panel is already delivering 208/120VAC three-phase service and the load profile includes mixed-voltage equipment that would otherwise require secondary distribution hardware.
