How do the two units differ in input voltage range, output capacity, and power quality?

Both units deliver 10,000 W / 10 kVA of double-conversion online output with a true sine waveform and a 3:1 crest factor, so load-handling quality is equivalent on paper. Output THD is specified at 2% for the SRT10KRMXLT-5KTF2; no THD figure is provided for the SRTL10KRM4UT-5KTF2.

The SRT10KRMXLT-5KTF2 has a notably wide input voltage window of 100–275 V at 40–70 Hz, making it tolerant of heavily distorted utility power and international voltage swings. The SRTL10KRM4UT-5KTF2 specifies input as 208 V AC or 240 V AC (1-phase), with no published minimum/maximum voltage range, so its input tolerance cannot be confirmed from available specs.

Output voltage on the SRT10KRMXLT-5KTF2 spans 120–208 V (served via the included step-down transformers), while the SRTL10KRM4UT-5KTF2 outputs 208 V / 240 V AC natively—the step-down transformers in the bundle handle 120 V loads downstream. Surge energy rating (480 J) and EPO support are documented only for the SRT10KRMXLT-5KTF2; neither spec is published for the SRTL10KRM4UT-5KTF2.

What are the battery chemistry, recharge time, and runtime extension differences between these two UPS units?

This is the most consequential differentiator. The SRTL10KRM4UT-5KTF2 uses lithium-ion (Li-Ion) chemistry at a 180 V battery voltage, with a specified typical recharge time of 1.5 hours and a battery charging power of 1,200 W. Lithium-ion chemistry generally offers longer calendar life, lighter weight, and faster recharge compared to traditional VRLA lead-acid cells—though neither cycle-life figures nor runtime curves are provided in the available specs.

The SRT10KRMXLT-5KTF2 does not specify battery chemistry, battery voltage, or recharge time in the provided data. Runtime extension capability is not documented for the SRT10KRMXLT-5KTF2; the SRTL10KRM4UT-5KTF2 lists 'Extendable Runtime: 0,' indicating no external battery pack support per the published spec.

Buyers planning to extend runtime via external battery cabinets should verify compatibility independently for both models, as the SRTL10KRM4UT-5KTF2 explicitly states no runtime extension, and the SRT10KRMXLT-5KTF2 does not address the question in the available data.

How do the two units compare in rack footprint, onboard management, and environmental ratings?

The SRTL10KRM4UT-5KTF2 occupies 4U of rack space and is rack/tower convertible with an included kit. It ships with an embedded network management card (NMC3), a multi-function LCD status and control console, USB port, serial port, and an available expansion slot—providing out-of-box remote monitoring without additional accessories. Color is specified as silver grey. Packaged weight is 397.9 lb (180.5 kg); shipping carton dimensions are 41.5 × 25.6 × 39.4 in.

The SRT10KRMXLT-5KTF2 does not specify rack unit height or physical dimensions in the provided data. It confirms web-based management support, audible alarms, and EPO; however, whether an NMC is included or must be added separately is not stated in the available specs.

Environmental ratings are documented only for the SRTL10KRM4UT-5KTF2: IP20 ingress protection, 0–95% non-condensing relative humidity (operating and storage), operating altitude 0–10,000 ft, storage altitude 0–50,000 ft, and storage temperature 5–113 °F (−15–45 °C). Noise level is 55 dB for both units. No IP rating or altitude figures are published for the SRT10KRMXLT-5KTF2.

Which should you choose: the SRT10KRMXLT-5KTF2 or the SRTL10KRM4UT-5KTF2?

Our take: The SRTL10KRM4UT-5KTF2 is the stronger choice when battery longevity, fast recharge, and out-of-box network management are priorities—its lithium-ion chemistry recharges in 1.5 hours at 1,200 W, the embedded NMC3 eliminates an accessory purchase, and its 4U rack footprint and IP20/altitude ratings are fully documented. The SRT10KRMXLT-5KTF2 has a decisive advantage in input voltage tolerance (100–275 V, 40–70 Hz versus an unspecified range for the SRTL), a published 480 J surge energy rating, EPO support, and a confirmed 2% output THD—making it the better fit for facilities with unstable or wide-ranging utility power. Buyers requiring runtime extension should note that the SRTL10KRM4UT-5KTF2 explicitly states no external battery support; the SRT10KRMXLT-5KTF2 does not address this in available specs. For stable 208 V data center environments prioritizing battery life and integrated management, the Li-Ion SRTL unit leads; for utility-variable or mixed-voltage sites, the SRT10KRMXLT-5KTF2's broader input window is the deciding factor.

Side-by-Side Comparison

Spec-for-spec, from manufacturer data.

Frequently Asked Questions

Related Resources

• APC by Schneider Electric SRT10KRMXLT-5KTF2 product page — full specs and to add to a quote
• APC by Schneider Electric SRTL10KRM4UT-5KTF2 product page — full specs and to add to a quote