APC by Schneider Electric SRT6KXLT vs APC by Schneider Electric SRT6KRMXLI: Specification Comparison
Both units are APC Smart-UPS On-Line double-conversion UPS systems rated at 6000 VA / 6000 W, targeting data centers, server rooms, and critical infrastructure requiring zero transfer time and pure sine wave output. The SRT6KXLT is a North American 208/240 V tower-form extended-runtime model, while the SRT6KRMXLI is a rackmount 230 V international model. Buyers cross-shopping these will weigh input/output voltage compatibility, form factor, deployment environment, and management feature depth before committing.
In This Guide
- Which unit matches your facility's voltage and wiring infrastructure?
- How do the two units compare on efficiency, runtime, and battery management?
- Which unit better fits your rack, physical space, and remote management requirements?
- Which should you choose: the SRT6KXLT or the SRT6KRMXLI?
- Side-by-Side Specs
- FAQ
Which unit matches your facility's voltage and wiring infrastructure?
The SRT6KXLT is designed for North American electrical environments, accepting 208 V AC or 240 V AC single-phase input via a hard-wired 3-wire (2PH + G) connection. Output is likewise 208 V or 240 V single-phase, also hard-wired. Input frequency is auto-sensing across 40–70 Hz. The hard-wire-only input and output means no standard NEMA plug is used; a licensed electrician must terminate both ends. The battery voltage is specified at 192 V DC.
The SRT6KRMXLI accepts a wider input voltage window of 100–275 V, making it compatible with the broader variance found in international single-phase supplies (220–240 V nominal). Output is specified between 220 V and 240 V. Input frequency range is identically 40–70 Hz. The SRT6KRMXLI's specs do not detail the physical connector or wiring method. Both units share the same 6000 VA / 6000 W capacity and sine wave output, but voltage compatibility is region-specific: the SRT6KXLT targets 208 V North American circuits; the SRT6KRMXLI targets 220–240 V international circuits.
How do the two units compare on efficiency, runtime, and battery management?
Both units are double-conversion (on-line) topology, meaning the load runs continuously off the inverter with zero transfer time on mains failure. The SRT6KRMXLI spec sheet states a measured efficiency of 94.4% at load. The SRT6KXLT does not provide a discrete efficiency percentage in the supplied specifications; instead it references a viewable graph. Buyers who need a published efficiency figure for data center PUE calculations or ENERGY STAR compliance documentation will find only the SRT6KXLT carries an ENERGY STAR V2.0 (USA) certification among the supplied data.
The SRT6KXLT is explicitly an 'Extended Runtime' model (the 'XLT' suffix), with a flag of extendable runtime = yes, a typical recharge time of 1.5 hours, a battery charging power of 579 W, and a battery life rating of 3–5 years. The replacement battery is identified as APCRBC140. Runtime graphs are referenced but not tabulated in the supplied specs. The SRT6KRMXLI spec sheet does not enumerate recharge time, battery voltage, battery life expectancy, or a named replacement battery. Heat dissipation for the SRT6KXLT is specified at 1402 Btu/h; the SRT6KRMXLI does not provide this figure.
Which unit better fits your rack, physical space, and remote management requirements?
The SRT6KXLT ships as a tower unit with an included mounting kit; the spec notes 'two-post mountable: 0' and mounting position as vertical, so rack integration requires verification of optional accessories not detailed here. Physical dimensions are 17.008 in (432 mm) wide, with a unit weight of 134.99 lb (61.23 kg) and a shipping weight of 142 lb (64.41 kg). Color is black. The SRT6KRMXLI carries 'RM' in its name indicating a rackmount form factor, but rack-unit height, depth, and physical dimensions are not provided in the supplied spec sheet.
Management depth strongly favors the SRT6KXLT in the supplied data: it ships with a preinstalled Network Management Card 3 (NMC3) with environmental monitoring, a USB port, a serial port, an embedded NMC3, and one available expansion slot. A temperature probe, USB cable, and Web/SNMP management card are listed in the provided equipment. Connectivity options are therefore out-of-box networked. The SRT6KRMXLI spec sheet confirms Emergency Power Off (EPO) support and audible alarms, but does not detail any network management card, expansion slots, or communication ports. IP protection for the SRT6KXLT is IP20; the SRT6KRMXLI does not state an IP rating. Operating altitude for the SRT6KXLT is 0–10,000 ft; storage altitude is 0–50,000 ft with 0–95% non-condensing humidity; these environmental parameters are not provided for the SRT6KRMXLI.
Which should you choose: the SRT6KXLT or the SRT6KRMXLI?
Our take: The SRT6KXLT is the stronger choice when the installation site runs North American 208 V circuits, requires out-of-box networked management, and demands documented ENERGY STAR V2.0 certification. Concretely: the SRT6KXLT ships with a preinstalled NMC3 plus an expansion slot versus no management card specified for the SRT6KRMXLI; it carries ENERGY STAR V2.0 and UL 1778 certifications absent from the SRT6KRMXLI data; and its input is engineered for 208/240 V North American hard-wire wiring versus the SRT6KRMXLI's 100–275 V international range. Conversely, the SRT6KRMXLI publishes a discrete efficiency figure of 94.4% that the SRT6KXLT specs do not match with a comparable number, and its wider input window suits international or variable-voltage facilities. Choose the SRT6KXLT for North American 208 V data centers needing SNMP management from day one; choose the SRT6KRMXLI for 220–240 V international environments where a documented efficiency figure is required and rack form factor is confirmed by vendor.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | APC by Schneider Electric SRT6KXLT | APC by Schneider Electric SRT6KRMXLI |
|---|---|---|
| UPS Topology | Double-conversion (On-Line) | Double-conversion (On-Line) |
| Rated Power (VA) | 6000 VA | 6000 VA |
| Rated Power (W) | 6000 W | 6000 W |
| Input Voltage | 208 V / 240 V AC (1-phase) | 100–275 V (1-phase) |
| Input Connection | Hard Wire 3-wire (2PH + G) | — |
| Input Frequency | 40–70 Hz auto-sensing | 40–70 Hz |
| Output Voltage | 208 V / 240 V (1-phase) | 220–240 V (1-phase) |
| Output Frequency | 50/60 Hz ±3 Hz sync to mains | 50/60 Hz |
| Efficiency | — | 94.4% |
| Waveform | Sine wave | Sine wave |
| Crest Factor | 3:1 | 3:1 |
| Harmonic Distortion | Less than 2% | — |
| Surge Energy Rating | 480 J | 480 J |
| Noise Level | 55 dBA | 55 dB |
| Network Management | NMC3 preinstalled + expansion slot | — |
| Form Factor / Mounting | Tower (rack kit included) | Rackmount (RM) |
| Emergency Power Off (EPO) | — | Yes |
| ENERGY STAR Certified | V2.0 (USA) | — |
| Battery Type | Lead-Acid, 192 V | — |
| Recharge Time | 1.5 h | — |
| Battery Life | 3–5 years | — |
| Replacement Battery | APCRBC140 | — |
| Heat Dissipation | 1402 Btu/h | — |
| Unit Weight | 134.99 lb (61.23 kg) | — |
| IP Protection | IP20 | — |
| Operating Altitude | 0–10,000 ft | — |
Frequently Asked Questions
Which should you choose: the SRT6KXLT or the SRT6KRMXLI?
The SRT6KXLT is the stronger choice when the installation site runs North American 208 V circuits, requires out-of-box networked management, and demands documented ENERGY STAR V2.0 certification. Concretely: the SRT6KXLT ships with a preinstalled NMC3 plus an expansion slot versus no management card specified for the SRT6KRMXLI; it carries ENERGY STAR V2.0 and UL 1778 certifications absent from the SRT6KRMXLI data; and its input is engineered for 208/240 V North American hard-wire wiring versus the SRT6KRMXLI's 100–275 V international range. Conversely, the SRT6KRMXLI publishes a discrete efficiency figure of 94.4% that the SRT6KXLT specs do not match with a comparable number, and its wider input window suits international or variable-voltage facilities. Choose the SRT6KXLT for North American 208 V data centers needing SNMP management from day one; choose the SRT6KRMXLI for 220–240 V international environments where a documented efficiency figure is required and rack form factor is confirmed by vendor.
Can I use the SRT6KRMXLI in a North American 208 V data center?
Based on the supplied specifications, the SRT6KRMXLI's output voltage range is stated as 220–240 V, which does not include 208 V. The SRT6KXLT explicitly lists 208 V AC as both an input and output voltage. Buyers requiring 208 V compatibility should select the SRT6KXLT; confirm with APC before deploying the SRT6KRMXLI on a 208 V circuit.
Does either UPS include network management out of the box, or do I need to buy a card separately?
According to the supplied specifications, the SRT6KXLT ships with a preinstalled Network Management Card 3 (NMC3) with environmental monitoring, plus a USB port, serial port, and one additional expansion slot. The SRT6KRMXLI's supplied spec sheet does not mention any included or optional network management card, communication ports, or expansion slots. If out-of-box SNMP or web management is required, the SRT6KXLT has a clear documented advantage.
Which unit is better suited to a high-density rackmount deployment?
The SRT6KRMXLI includes 'RM' (rackmount) in its model name, indicating a rack-optimized chassis. However, the supplied spec sheet does not provide rack-unit height or depth dimensions. The SRT6KXLT is specified as a tower unit (mounting position: vertical) with two-post mountable listed as 0, meaning standard two-post rack mounting is not confirmed from the supplied data. Buyers planning a high-density rack environment should obtain the full rackmount dimensional specs from APC for the SRT6KRMXLI and clarify optional rack-mount kit availability for the SRT6KXLT before purchasing.
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