Vertiv AS4C0NCJGNNXLKB 15kVA Scalable to 20kVA N+1 Online UPS
Overview
The Vertiv AS4C0NCJGNNXLKB is a 15kVA / 13.5kW online UPS built for facilities that need hardwired three-phase power protection today and a clear path to 20kVA / 18.0kW as load requirements grow. With 15 minutes of full-load runtime and 39 minutes at half load, this unit is engineered for power protection scenarios where brief outages must be ridden out while generators come online — not for extended blackout coverage. The scalable architecture means you can right-size for current draw without buying capacity you won't use for two years, then expand within the same chassis as the environment grows.
Hardwire input (L-L-G) and hardwire output eliminate the connector-failure risk that comes with large plug-and-receptacle configurations at this power level. Optional Power Distribution (POD) outputs extend flexibility for downstream distribution without requiring a separate PDU cabinet in every configuration. This combination makes the AS4C0NCJGNNXLKB a practical anchor for data center rows, critical communication rooms, and industrial control environments where electrician-terminated connections are standard practice.
Key Features
- 15kVA / 13.5kW Active Capacity: Handles the actual kilowatt draw of fully loaded server racks, network switching gear, or industrial control panels at a 0.9 power factor — the real-world number that matters when you're sizing against PDU breaker ratings, not marketing kVA.
- Scalable to 20kVA / 18.0kW: The N+1 architecture supports expanding from 15kVA to 20kVA within the same platform. That means infrastructure investment is preserved as load grows — you're buying headroom, not replacing hardware.
- 15-Minute Full-Load Runtime: At 15kVA / 13.5kW — 100% load — this unit delivers 15 minutes of ride-through. That's enough for controlled shutdown sequences on most server environments or for generator transfer switching in facilities with reliable genset infrastructure.
- 39-Minute Half-Load Runtime: At 7.5kVA / 6.75kW (50% load), runtime extends to 39 minutes. Environments that run below nameplate capacity — common in partially populated racks — get significantly extended coverage without adding external battery cabinets.
- Hardwire Input (L-L-G): Three-wire hardwire input eliminates the NEMA plug as a failure point at this power class. Electrician-terminated connections are code-compliant for permanent installations and reduce arc-flash risk versus high-amperage receptacles.
- Hardwire Output with Optional PODs: Primary output is hardwired for direct connection to a downstream panel or transfer switch. Optional Power Output Distribution (POD) modules provide receptacle-level distribution flexibility where needed, without requiring a dedicated PDU for every load group.
- N+1 Redundancy Architecture: The scalable-to-20kVA design supports N+1 redundancy configurations, meaning a single unit failure in a parallel setup won't take down the protected load — critical for environments where planned maintenance windows are difficult to schedule.
Integration and Compatibility
The Vertiv UPS line at this power class is designed for integration into facilities with existing uninterruptible power supply infrastructure, generator transfer switch panels, and building management systems. The hardwire I/O topology means this unit pairs naturally with automatic transfer switches and manual bypass panels — standard components in any data center or critical facility power chain. Optional POD outputs allow direct connection to IT equipment or sub-distribution panels depending on site layout. For installations requiring parallel redundancy or modular expansion, the scalable-to-20kVA platform supports multi-unit power distribution architectures without replacing the base unit when capacity requirements increase. Consult the site's electrical engineer for conductor sizing, fault current ratings, and breaker coordination at the 15–20kVA range before finalizing installation.
Frequently Asked Questions
Q: What is the full-load runtime of the AS4C0NCJGNNXLKB at 15kVA?
A: At full load (15kVA / 13.5kW), the AS4C0NCJGNNXLKB provides 15 minutes of battery runtime. At half load (approximately 7.5kVA), runtime extends to 39 minutes.
Q: Can the AS4C0NCJGNNXLKB scale beyond 15kVA without replacing the unit?
A: Yes. The AS4C0NCJGNNXLKB is scalable to 20kVA / 18.0kW within the same platform, supporting N+1 redundancy configurations and future load growth without a full hardware replacement.
Q: What type of input connection does the AS4C0NCJGNNXLKB require?
A: The unit requires a hardwire input connection (L-L-G) — there is no NEMA plug. Installation requires electrician-terminated wiring, which is standard for permanent UPS deployments at this power class.
Q: Does the AS4C0NCJGNNXLKB support receptacle-level output distribution?
A: The primary output is hardwired. However, optional Power Output Distribution (POD) modules are available to provide receptacle-level distribution flexibility for downstream equipment without requiring a separate PDU cabinet.
Q: How does the AS4C0NCJGNNXLKB compare to the AS4C0NCWGNNXLKB in the same family?
A: Both models share the same 15kVA / 13.5kW capacity and 20kVA scalability with identical hardwire I/O. The AS4C0NCJGNNXLKB offers significantly more runtime — 15 minutes full load and 39 minutes half load — compared to the AS4C0NCWGNNXLKB's 5 minutes full load and 15 minutes half load. Choose the AS4C0NCJGNNXLKB when generator transfer time or controlled shutdown sequences require more than a few minutes of bridge power.
Q: Is the AS4C0NCJGNNXLKB suitable for environments without a backup generator?
A: With 15 minutes at full load, this unit is sized for generator-backed facilities where ride-through time is measured in minutes, not hours. For standalone extended runtime without a generator, external battery cabinets or a higher-runtime model in the family should be evaluated based on site-specific shutdown or transfer requirements.
The AS4C0NCJGNNXLKB sits in the sweet spot of the Vertiv scalable UPS family for facilities that are currently loading 15kVA but expect to push toward 20kVA within a budget cycle or two. That 15-minute full-load runtime is the spec I'd focus on first — it's longer than most people expect at this capacity tier, and it's the difference between a unit that barely covers generator transfer versus one that gives an operator time to make a decision if the genset doesn't start cleanly on the first attempt.
Technical Highlights:
- Runtime at Full Load (15 min): 15 minutes at 15kVA / 13.5kW means this unit comfortably covers typical generator transfer times of 10–30 seconds with substantial margin — and handles edge cases where a generator requires a second crank cycle before stabilizing.
- Half-Load Runtime (39 min): At 50% load — a realistic figure for partially populated racks — runtime jumps to 39 minutes. That's a controlled-shutdown window for most server environments without touching an external battery cabinet.
- Scalable to 20kVA / 18.0kW: The N+1 scalability isn't just a marketing claim at this model tier — within the AS4x0NC family, you can see the exact runtime tradeoff at each capacity step. Moving from 15kVA to 20kVA active (AS4D0NCJGNNXLKB) drops full-load runtime to 10 minutes, so the AS4C0NCJGNNXLKB gives you the best runtime-to-capacity ratio in the 20kVA-scalable tier.
Deployment Considerations:
- Hardwire input (L-L-G) requires a licensed electrician for installation — budget for conduit, wire pull, and termination labor as a separate line item. This is not a plug-in deployment.
- If your facility doesn't have a generator and you're relying solely on battery runtime for planned maintenance, 15 minutes at full load is a hard ceiling. Plan shutdown sequences around that window or spec external battery cabinets before commissioning.
The AS4C0NCJGNNXLKB is the right call for medium-density data rooms and communication equipment rooms in generator-backed facilities where the primary requirement is ride-through time plus a credible expansion path — not a unit where you're guessing at future load and hoping the hardware keeps up.
