APC by Schneider Electric SURT15KRMXLI vs APC by Schneider Electric SURT15KRMXLT-1TF10K: Specification Comparison
Both the SURT15KRMXLI and the SURT15KRMXLT-1TF10K are APC Smart-UPS RT rack-mounted, double-conversion online UPS systems rated at 15 kVA / 12,000 W. They occupy the same power class and device category, making them a legitimate cross-shop for data-center and critical-infrastructure buyers evaluating a 15 kVA online UPS. The primary differentiator driving the comparison is input/output voltage architecture: the SURT15KRMXLI is a 230 V single-output unit, while the SURT15KRMXLT-1TF10K is a 208 V input model bundled with a 10 kVA step-down transformer that adds 120 V output capability.
In This Guide
- Which unit fits your facility's voltage and outlet requirements?
- How do the two units compare on efficiency, battery provisioning, and runtime extension?
- What are the physical footprint, environmental ratings, and management capabilities of each unit?
- Which should you choose: the SURT15KRMXLI or the SURT15KRMXLT-1TF10K?
- Side-by-Side Specs
- FAQ
Which unit fits your facility's voltage and outlet requirements?
The SURT15KRMXLI accepts and outputs in the 220–240 V range (230 V nominal), with C19 coupler output connectors and a single-phase output. It is designed for international or 230 V North American environments where all connected loads run at high voltage. Maximum input current is listed at 90 A.
The SURT15KRMXLT-1TF10K is engineered for 208 V North American facility power. Its integrated step-down transformer adds 120 V output, making it uniquely capable of feeding both 120 V and 208 V loads simultaneously from a single UPS. Output connectors include 2× NEMA L5-20R (120 V), 4× NEMA L6-20R (208 V), 2× NEMA L6-30R (208 V), and 2× NEMA L14-30R (120/208 V split), plus a hard-wire 4-wire (2PH+N+G) output. Maximum input current is 83 A. Input THD is specified at less than 5% at full load, a figure not provided for the SURT15KRMXLI.
Buyers with a 208 V facility running mixed 120 V / 208 V equipment gain significant outlet flexibility from the SURT15KRMXLT-1TF10K that the SURT15KRMXLI does not offer. Conversely, sites wired for 230 V single-phase have no use for the step-down transformer and are better served by the SURT15KRMXLI's simpler architecture.
How do the two units compare on efficiency, battery provisioning, and runtime extension?
The SURT15KRMXLI is rated at 95% efficiency. No battery specifications—type, voltage, recharge time, or included modules—are provided in the available spec data for this model.
The SURT15KRMXLT-1TF10K is rated at 93% efficiency at full load, two percentage points lower than the SURT15KRMXLI. It ships with 4 included battery modules (lead-acid, ±192 V split), a rated battery charge power of 1,530 W, a typical recharge time of 2.5 hours, and a stated battery life of 3–5 years. End-of-discharge battery voltage is ±154 V. Runtime extension via external battery modules is supported (Extendable Run Time: 1).
On efficiency, the SURT15KRMXLI holds a 2-percentage-point advantage per spec. On battery transparency, the SURT15KRMXLT-1TF10K provides substantially more detail. Buyers who need to calculate runtime or plan battery replacement cycles will find the SURT15KRMXLT-1TF10K specs more actionable; the SURT15KRMXLI's battery characteristics are not available in the provided data.
What are the physical footprint, environmental ratings, and management capabilities of each unit?
Physical dimensions and weight are specified only for the SURT15KRMXLT-1TF10K: 27.87 in H × 17.01 in W × 30.43 in D (70.8 × 43.2 × 77.3 cm), 766.61 lb (347.73 kg), 16U rack-mounted. These figures reflect the UPS plus its integrated transformer, resulting in a very high combined weight. Physical dimensions and rack-unit count are not provided for the SURT15KRMXLI.
Environmental ratings are provided only for the SURT15KRMXLT-1TF10K: operating temperature 0–40 °C, relative humidity 0–95% non-condensing, operating altitude 0–10,000 ft, storage altitude 0–50,000 ft, IP20 ingress protection, and an online thermal dissipation of 2,610 Btu/h. Acoustic output for both units is specified at 50 dB / 50 dBA respectively. These environmental specs are absent for the SURT15KRMXLI.
For management, the SURT15KRMXLT-1TF10K comes with a pre-installed Network Management Card 2 and a built-in static bypass, both confirmed in the specs. It also includes full-time multi-pole noise filtering, IEEE surge let-through of 0.3%, and zero clamping response time. The SURT15KRMXLI lists surge protection, EPO, audible alarms, and auto-restart as confirmed features, but network management card inclusion and bypass type are not specified. The SURT15KRMXLT-1TF10K's warranty is explicitly stated as 2 years repair or replace; warranty for the SURT15KRMXLI is not provided in the available specs.
Which should you choose: the SURT15KRMXLI or the SURT15KRMXLT-1TF10K?
Our take: The SURT15KRMXLI is the stronger choice when your facility runs 230 V single-phase power and you need a compact, high-efficiency UPS without an integrated step-down transformer. The SURT15KRMXLT-1TF10K is the correct selection for 208 V North American data centers that must simultaneously feed 120 V and 208 V loads from one UPS. Three concrete spec deltas: (1) efficiency is 95% for the SURT15KRMXLI versus 93% for the SURT15KRMXLT-1TF10K, a meaningful difference at 12,000 W continuous load; (2) the SURT15KRMXLT-1TF10K ships with 4 included lead-acid battery modules and a 2.5-hour recharge time, while battery specs are absent for the SURT15KRMXLI; (3) the SURT15KRMXLT-1TF10K's integrated transformer adds 766 lb of combined weight versus an unspecified figure for the SURT15KRMXLI, a critical floor-load consideration. Specify the SURT15KRMXLT-1TF10K for mixed-voltage North American server rooms; specify the SURT15KRMXLI for 230 V international deployments or single-voltage 230 V North American environments.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | APC by Schneider Electric SURT15KRMXLI | APC by Schneider Electric SURT15KRMXLT-1TF10K |
|---|---|---|
| UPS Topology | Double-conversion (Online) | Double Conversion Online |
| Rated Power (VA) | 15,000 VA | 15,000 VA |
| Rated Power (W) | 12,000 W | 12,000 W |
| Main Input Voltage | — | 208 V |
| Output Voltage(s) | 220–240 V | 120 V, 208 V, 220 V, 240 V |
| Input Frequency | 40–70 Hz | 40–70 Hz auto-sensing |
| Max Input Current | 90 A | 83 A |
| Input THD | — | < 5% at full load |
| Efficiency | 95% | 93% at full load |
| Waveform | Sine | Sine wave |
| Crest Factor | 3:1 | 3:1 |
| Output Frequency | 50/60 Hz | 50/60 Hz ±3 Hz user adjustable |
| Output Connectors | C19 coupler | 2× NEMA L5-20R, 4× NEMA L6-20R, 2× NEMA L6-30R, 2× NEMA L14-30R, 1× Hard Wire 4-wire |
| Bypass Type | — | Built-in Static Bypass |
| Included Battery Modules | — | 4 (Lead-Acid, ±192 V) |
| Battery Recharge Time | — | 2.5 h |
| Battery Life | — | 3–5 years |
| Acoustic Level | 50 dB | 50 dBA |
| Thermal Dissipation | — | 2,610 Btu/h |
| Operating Temperature | — | 0–40 °C (32–104 °F) |
| Operating Altitude | — | 0–10,000 ft |
| IP Protection | — | IP20 |
| Rack Size | — | 16U |
| Net Weight | — | 766.61 lb (347.73 kg) |
| Network Management Card | — | Pre-installed NMC2 |
| EPO | Yes | — |
| Surge Protection | Yes | Yes |
| IEEE Surge Let-through | — | 0.3% |
| Warranty | — | 2 years repair or replace |
| Auto-Restart | Yes | — |
| Audible Alarm | Yes | — |
Frequently Asked Questions
Which should you choose: the SURT15KRMXLI or the SURT15KRMXLT-1TF10K?
The SURT15KRMXLI is the stronger choice when your facility runs 230 V single-phase power and you need a compact, high-efficiency UPS without an integrated step-down transformer. The SURT15KRMXLT-1TF10K is the correct selection for 208 V North American data centers that must simultaneously feed 120 V and 208 V loads from one UPS. Three concrete spec deltas: (1) efficiency is 95% for the SURT15KRMXLI versus 93% for the SURT15KRMXLT-1TF10K, a meaningful difference at 12,000 W continuous load; (2) the SURT15KRMXLT-1TF10K ships with 4 included lead-acid battery modules and a 2.5-hour recharge time, while battery specs are absent for the SURT15KRMXLI; (3) the SURT15KRMXLT-1TF10K's integrated transformer adds 766 lb of combined weight versus an unspecified figure for the SURT15KRMXLI, a critical floor-load consideration. Specify the SURT15KRMXLT-1TF10K for mixed-voltage North American server rooms; specify the SURT15KRMXLI for 230 V international deployments or single-voltage 230 V North American environments.
Can the SURT15KRMXLI power 120 V equipment directly?
Based on the provided specifications, no. The SURT15KRMXLI outputs in the 220–240 V range with C19 coupler connectors. It does not include a step-down transformer and is not listed as providing 120 V output. The SURT15KRMXLT-1TF10K, by contrast, includes an integrated 10 kVA step-down transformer and provides 120 V output via NEMA L5-20R and L14-30R receptacles.
Which unit has better efficiency, and does it matter at 15 kVA?
The SURT15KRMXLI is specified at 95% efficiency; the SURT15KRMXLT-1TF10K is specified at 93% efficiency at full load. The 2-percentage-point difference translates to approximately 240 W of additional heat dissipation at 12,000 W full load for the less-efficient unit—relevant for cooling budgets in dense deployments. The SURT15KRMXLT-1TF10K's thermal dissipation is separately listed at 2,610 Btu/h; an equivalent figure is not provided for the SURT15KRMXLI.
Does either unit include a network management card out of the box?
The SURT15KRMXLT-1TF10K is specified as including a pre-installed Network Management Card 2. The provided specifications for the SURT15KRMXLI do not list a network management card as included. Buyers requiring out-of-box remote monitoring and management should confirm card inclusion with the SURT15KRMXLI before purchase.
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