APC by Schneider Electric SRT10KXLT 10kVA Online Double-Conversion UPS
Overview
The APC by Schneider Electric SRT10KXLT is a 10 kVA / 10,000W true online double-conversion UPS designed for mission-critical loads where power quality and zero transfer time matter — think server rooms, network operations centers, broadcast infrastructure, and surveillance installations running high-density NVR racks and PoE switching. Unlike standby or line-interactive topologies, the SRT10KXLT continuously regenerates output power from a clean sine wave, meaning your connected equipment never rides raw utility power at all. Input variations from 100V to 275V are absorbed without touching the battery, and the output stays locked at 208V regardless of what the grid delivers.
Key Features
- True Online Double-Conversion (0ms Transfer): The SRT10KXLT's double-conversion topology means output power is always synthesized from DC — the inverter never switches off. There is no transfer time to battery during a utility failure. For VMS servers, NVRs, and network switches that can't tolerate even a half-cycle gap, this is the topology that eliminates the risk entirely.
- 10 kVA / 10,000W Output Capacity: With a 10 kW real-power rating and unity-adjacent sizing, you can load this unit to its nameplate without significant derating. A fully loaded 10kVA UPS at 0.9 power factor actually delivers 9kW — the SRT10KXLT's 10kW rating means it's specified at unity, so the numbers you plan with are the numbers you get.
- Wide Input Voltage Window (100–275V): The SRT10KXLT tolerates input anywhere from 100V to 275V and input frequencies from 40Hz to 70Hz without switching to battery. In environments with poor power quality — industrial facilities, older buildings, international installations — this range prevents unnecessary battery cycling that shortens battery life.
- Pure Sine Wave Output: Output waveform is a true sine wave, not a stepped approximation. Active PFC power supplies, variable-frequency motor drives, and medical-grade equipment all require sine wave input to operate correctly. If any connected load specifies sine wave input, this requirement is non-negotiable.
- 3:1 Crest Factor Tolerance: A crest factor rating of 3:1 means the SRT10KXLT handles loads with high peak-to-RMS current ratios — switching power supplies and rectifier-input equipment routinely present crest factors of 2.5–3.0. UPS units with lower crest factor ratings clip these peaks and introduce distortion; the SRT10KXLT is sized to absorb them cleanly.
- 480J Surge Energy Rating: The integrated surge suppressor absorbs 480 joules of transient energy — adequate for typical utility-side transients. Note that in environments with frequent lightning exposure or heavy industrial switching transients, an upstream dedicated surge suppression device is still advisable as a first line of defense.
- 55 dB EMI/RFI Noise Filtering: At 55 dB of attenuation, the SRT10KXLT's filtering removes conducted noise from the input before it reaches your equipment. Sensitive analog video, audio, and RF infrastructure downstream will see a cleaner supply than raw utility provides.
- Six Outlets: NEMA L6-20R and L6-30R: Output receptacles are twist-lock 208V connectors — L6-20R (20A) and L6-30R (30A) — appropriate for data center PDUs, server rack power strips, and high-draw network equipment. Verify your downstream PDU and device cord ends match L6 twist-lock before ordering; these are not standard NEMA 5-15 household outlets.
- Dual RJ-45 Network Management Ports (10/100Base-T): Two Ethernet management interfaces allow the UPS to integrate into your network monitoring stack for remote status, load reporting, and graceful shutdown coordination. With two ports, you can daisy-chain or connect to redundant management networks without an external switch.
- USB Interface: The onboard USB port supports direct connection to a server or workstation for local UPS communication and graceful OS shutdown — useful in deployments where network management is not yet configured or as a backup communication path.
- Audible Alarm: Built-in audible alarming provides local notification of fault conditions — relevant in unmanned equipment rooms where a visual-only alert would go unnoticed during a failure event.
Integration and Compatibility
The SRT10KXLT's dual 10/100Base-T Ethernet ports accommodate standard SNMP-based UPS monitoring and integration with data center infrastructure management (DCIM) platforms. The USB interface provides an OS-native communication path for workstation or server-based graceful shutdown agents. The L6-20R and L6-30R output receptacles align with standard data center power distribution units rated for 208V single-phase circuits. For deployments integrating with network video recorders or large PoE switch stacks, confirm your total connected load — including inrush — stays within the 10,000W continuous rating. For guidance on sizing power protection to your UPS and power infrastructure requirements, review your site's total VA demand before specifying a single-unit solution at this capacity. If your load profile exceeds 10 kVA or requires parallel redundancy (N+1), consider a higher-capacity or paralleling-capable variant in the APC Smart-UPS On-Line family. Consult the surveillance infrastructure planning resources for rack power budgeting guidance in camera-dense deployments.
Frequently Asked Questions
Q: What is the difference between the SRT10KXLT's double-conversion topology and a line-interactive UPS?
A: A line-interactive UPS passes utility power directly to connected equipment under normal conditions and only switches to inverter when utility fails — introducing a transfer time of 2–10ms. The SRT10KXLT uses double-conversion: the inverter runs continuously and connected equipment always receives synthesized, regulated output. Transfer time to battery is effectively zero because the inverter never switches off.
Q: What outlet types does the SRT10KXLT provide, and are they compatible with standard server rack PDUs?
A: The SRT10KXLT provides 6 outlets in NEMA L6-20R (20A, 208V twist-lock) and NEMA L6-30R (30A, 208V twist-lock) configurations. These are standard data center outlet types compatible with most rack PDUs designed for 208V single-phase circuits. Verify your PDU and equipment power cords terminate in matching L6 plugs — these are not compatible with standard NEMA 5-15 or 5-20 household/office outlets.
Q: What input voltage range can the SRT10KXLT tolerate without switching to battery?
A: The SRT10KXLT accepts input voltages from 100V to 275V and input frequencies from 40Hz to 70Hz without transferring to battery. This wide window is particularly useful in facilities with variable power quality, international deployments, or environments with significant voltage sag during load switching.
Q: Does the SRT10KXLT support network-based monitoring and remote management?
A: Yes. The SRT10KXLT includes two RJ-45 Ethernet ports (10/100Base-T) for network management integration. It also provides a USB port for direct local communication. This supports SNMP-based monitoring platforms, graceful shutdown agents, and DCIM integration. Specific management card compatibility should be verified against APC's current accessory lineup for this chassis.
Q: Is the SRT10KXLT output a true sine wave?
A: Yes. The SRT10KXLT produces a true sine wave output — not a stepped or simulated approximation. This is required for compatibility with active PFC power supplies (standard in modern servers and workstations), variable-frequency drives, and any equipment whose specifications mandate sine wave input.
Q: What is the surge energy rating of the SRT10KXLT?
A: The SRT10KXLT has a surge energy rating of 480 joules with 55 dB of EMI/RFI noise filtering. For facilities with frequent lightning exposure or heavy industrial switching transients, an upstream dedicated transient voltage surge suppressor (TVSS) is recommended as an additional layer of protection.
The SRT10KXLT is the unit I recommend when a customer has a mixed rack of servers, managed switches, and NVR appliances that cannot tolerate any interruption gap — and where the input feed is suspect. The 100–275V input window is what makes this practical in older facilities; I've deployed it in buildings where the utility sags to 190V under HVAC load, and the double-conversion topology just absorbs it without a battery event.
Technical Highlights:
- Double-Conversion (Zero Transfer Time): The inverter runs continuously — there is no switching event on utility failure. Connected equipment sees unbroken, regulated 208V output at all times.
- 3:1 Crest Factor Tolerance: Modern server power supplies draw current in sharp peaks, routinely hitting crest factors of 2.5–3.0. The SRT10KXLT's 3:1 rating means it won't clip those peaks or introduce distortion on high-density compute loads.
- 55 dB EMI/RFI Filtering: In a rack that includes analog video encoders, RF distribution, or sensitive network timing equipment, 55 dB of conducted-noise attenuation makes a measurable difference versus a bare PDU feed.
Deployment Considerations:
- Output receptacles are NEMA L6-20R and L6-30R twist-lock — verify your PDU and equipment power cords match before the unit arrives on site. Adapters add failure points and are not recommended for permanent installation.
- At 10,000W continuous, confirm your facility circuit is sized appropriately — a 208V single-phase 60A dedicated circuit is the typical minimum. Factor inrush when calculating circuit capacity, not just steady-state draw.
The SRT10KXLT is the right fit for a mid-size security operations center or server room where you have 8–15 kW of mixed load, a single utility feed, and no tolerance for gaps during power events. If your load exceeds this unit's capacity or you need parallel redundancy for a truly fault-tolerant architecture, move to a higher-capacity or paralleling-capable model in the same APC Smart-UPS On-Line family.
