APC by Schneider Electric SRT6KXLI vs Vertiv GXT5-6000RT208: Specification Comparison
This comparison examines two rack-mount online double-conversion UPS systems in the 6 kVA class: the APC Smart-UPS SRT SRT6KXLI (6000 VA / 6000 W, 230 V IEC hardwire) and the Vertiv Liebert GXT5 GXT5-6000RT208 (6000 VA / 5000 W, 208 V hardwire). Both are aimed at IT infrastructure, data center edge deployments, and physical-security head-end rooms requiring true online topology. The comparison is limited by the fact that detailed electrical specifications are provided only for the APC unit; the Vertiv entry is represented solely by its VA/W rating from a family table.
In This Guide
- What are the real-watt output capacity and output power quality differences between these two units?
- How do input voltage flexibility and efficiency compare, and what do those numbers mean for installation planning?
- What connectivity, management, and physical integration options are documented for each unit?
- Which should you choose: the SRT6KXLI or the GXT5-6000RT208?
- Side-by-Side Specs
- FAQ
What are the real-watt output capacity and output power quality differences between these two units?
The SRT6KXLI is rated at 6000 VA and 6000 W, yielding a unity power factor (1.0) at full load. Its double-conversion sine-wave output carries a Total Harmonic Distortion of 3%, and the crest factor is 3:1, meaning it can handle non-linear loads such as switch-mode power supplies without clipping. Surge energy absorption is rated at 480 J with active surge protection confirmed.
The GXT5-6000RT208 is rated at 6000 VA but only 5000 W per its product title, giving an effective output power factor of approximately 0.83. This 1000 W gap is directly relevant when load calculations are tight. Output THD, crest factor, surge energy rating, and waveform type are not provided in the available spec data for this model, so no comparison on those axes is possible.
How do input voltage flexibility and efficiency compare, and what do those numbers mean for installation planning?
The SRT6KXLI accepts an input voltage range of 100 V to 275 V with a frequency window of 40–70 Hz, making it tolerant of sags and swells and compatible with a wide range of grid conditions. Its double-conversion efficiency is stated at 94.4%, which represents real operating losses of roughly 350 W at full load — relevant for cooling and energy budgeting in dense deployments.
No input voltage range, input frequency tolerance, or efficiency figure is provided for the GXT5-6000RT208 in the available spec data. Buyers must consult Vertiv's full datasheet for the RT208 variant before making installation or energy-budget decisions. The 208 V nominal input of the Vertiv (implied by the SKU suffix) contrasts with the 230 V nominal of the APC, which is a hard infrastructure consideration for North American versus international rack environments.
What connectivity, management, and physical integration options are documented for each unit?
The SRT6KXLI documents Emergency Power Off (EPO) support, which is a code-required feature in many data center and IDF closet installations. Noise output is stated at 55 dB, relevant in open-office or low-ceiling IDF deployments. Output voltage is selectable between 220 V and 240 V. Beyond EPO, no network management card, SNMP, USB, or serial specifications are listed in the provided spec data for either unit.
For the GXT5-6000RT208, EPO support, noise level, management interfaces, and output voltage range are all absent from the provided spec data. The product title references 'Pre-installed GXT3/GXT4 Pods,' implying battery module compatibility, but no runtime, battery chemistry, or expansion spec is included. Buyers requiring confirmed EPO compliance or specific management protocol support must verify those specs directly with Vertiv for this SKU.
Which should you choose: the SRT6KXLI or the GXT5-6000RT208?
Our take: The SRT6KXLI is the stronger choice when full electrical transparency, confirmed EPO compliance, and tight output power-factor requirements matter, because it is the only unit here with a documented spec sheet. Three concrete deltas stand out: (1) the APC delivers 6000 W versus the Vertiv's 5000 W — a 20% real-watt advantage at the same VA rating; (2) the APC specifies a 100–275 V input range and 94.4% efficiency, enabling accurate energy and cooling budgets, while neither figure exists in the Vertiv's available data; (3) the APC explicitly confirms EPO support and a 3% output THD, both procurement checklist items for physical-security head-end and IT closet installations. The GXT5-6000RT208 may be fully competitive once its complete datasheet is reviewed, but on the evidence provided it cannot be evaluated on most decision-relevant axes. Specify the Vertiv only after obtaining and comparing its full electrical spec sheet.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | APC by Schneider Electric SRT6KXLI | Vertiv GXT5-6000RT208 |
|---|---|---|
| Topology | Double-conversion (Online) | — |
| Output capacity (VA) | 6,000 VA | 6,000 VA |
| Output power (W) | 6,000 W | 5,000 W |
| Output power factor | 1.0 | ~0.83 |
| Nominal output voltage | 220–240 V | 208 V (implied by SKU) |
| Waveform | Sine wave | — |
| Output THD | 3% | — |
| Crest factor | 3:1 | — |
| Input voltage range | 100–275 V | — |
| Input frequency range | 40–70 Hz | — |
| Efficiency | 94.4% | — |
| Surge energy rating | 480 J | — |
| Surge protection | Yes | — |
| Emergency Power Off (EPO) | Yes | — |
| Noise level | 55 dB | — |
| Output phases | 1 | — |
Frequently Asked Questions
Which should you choose: the SRT6KXLI or the GXT5-6000RT208?
The SRT6KXLI is the stronger choice when full electrical transparency, confirmed EPO compliance, and tight output power-factor requirements matter, because it is the only unit here with a documented spec sheet. Three concrete deltas stand out: (1) the APC delivers 6000 W versus the Vertiv's 5000 W — a 20% real-watt advantage at the same VA rating; (2) the APC specifies a 100–275 V input range and 94.4% efficiency, enabling accurate energy and cooling budgets, while neither figure exists in the Vertiv's available data; (3) the APC explicitly confirms EPO support and a 3% output THD, both procurement checklist items for physical-security head-end and IT closet installations. The GXT5-6000RT208 may be fully competitive once its complete datasheet is reviewed, but on the evidence provided it cannot be evaluated on most decision-relevant axes. Specify the Vertiv only after obtaining and comparing its full electrical spec sheet.
Can the APC SRT6KXLI power a 5500 W load without derating?
Yes. The SRT6KXLI is rated at 6000 W with a unity power factor, so a 5500 W load sits at roughly 92% of rated capacity — within normal operating range for a double-conversion unit. The Vertiv GXT5-6000RT208 is rated at only 5000 W, so the same 5500 W load would exceed its stated real-watt rating.
Is the Vertiv GXT5-6000RT208 suitable for a 230 V infrastructure?
The SKU suffix RT208 indicates a 208 V variant, standard in North American three-phase environments. The APC SRT6KXLI is designed for 230 V nominal output (220–240 V range). Confirm your facility's branch-circuit voltage before specifying either unit, as a mismatch would require step-up or step-down transformers.
Which unit has confirmed Emergency Power Off support?
The APC SRT6KXLI explicitly lists EPO as a supported feature. EPO is not confirmed or denied in the available spec data for the Vertiv GXT5-6000RT208. If EPO is required by local electrical code or the Authority Having Jurisdiction, verify Vertiv's EPO capability in the full product datasheet before purchasing.
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