How do the power ratings, efficiency architecture, and output voltage flexibility compare between these two 5000VA UPS units?

Both units share the double-conversion online topology, meaning load power is continuously conditioned through the inverter with zero transfer time to battery — a critical requirement for sensitive IT equipment. However, their rated output wattage differs: the APC SRT5KXLT-IEC is rated at 4,250 W (5,000 VA at 0.85 power factor), while the Vertiv GXT5LI-5000MVRT3UXLN is rated at 5,000 W (5,000 VA at 1.0 power factor). This means the Vertiv unit delivers approximately 18% more real power output at full VA load, which matters when powering high-PF switching power supplies common in modern servers.

On input voltage flexibility, the APC unit accepts a wide 100–275 V range across 40–70 Hz, giving it substantial tolerance for unstable utility feeds. The Vertiv spec lists an input voltage range of 120V/240V via NEMA L14-30P wiring, but does not detail a min/max voltage window or frequency tolerance in the provided specifications. The APC's output is fixed at 208–240 V, whereas the Vertiv offers user-configurable output of 120V/208V or 120V/240V, adding flexibility for mixed-voltage rack environments.

Output waveform is pure sine on the APC unit (explicitly specified); the Vertiv specifications do not explicitly state waveform type in the provided data, though double-conversion topology inherently produces a sine output. The APC also specifies a 2% output voltage THD and a 3:1 crest factor, providing measurable waveform quality benchmarks. These figures are not provided for the Vertiv in the available specifications.

What are the differences in battery chemistry, safety certifications, and physical form factor between the two units?

Battery chemistry is the most structurally significant differentiator between these two units. The Vertiv GXT5LI-5000MVRT3UXLN uses lithium-ion (Li-Ion) battery cells and packs, as confirmed by its UL 1642 (Li-Ion Battery Cells) and UL 1973 (Li-Ion Battery Pack w/UPS) safety listings. Li-Ion chemistry typically offers longer cycle life, reduced weight per energy unit, faster recharge times, and a longer calendar life compared to VRLA/AGM batteries. The APC SRT5KXLT-IEC specifications provided do not identify battery chemistry.

The Vertiv unit carries a robust certification portfolio: UL 1778, CSA 22.2 No. 107.3, c-UL, FCC Part 15 Class A, and Energy Star 2.0. The APC specifications provided do not list safety or emissions certifications, so a direct certification comparison cannot be made from the available data.

Physically, the Vertiv unit is documented at 104.9 lbs, 5.2 in H × 16.9 in W × 35 in D in a rack/tower form factor. Physical dimensions and weight are not provided in the APC specifications, so rack-unit height, depth, and shipping weight cannot be compared. Buyers with tight rack space or floor-load constraints should consult APC's published datasheet for the SRT5KXLT-IEC.

How do the two units compare on management interfaces, alarm features, and data-center integration capabilities?

The APC SRT5KXLT-IEC specifies web-based management, an audible alarm, auto-restart capability, and Emergency Power Off (EPO) — a required safety feature in many data center and NEC-compliant electrical installations. EPO allows a single-point shutdown of UPS output in an emergency, a specification absent from the provided Vertiv data.

The Vertiv GXT5LI-5000MVRT3UXLN lists Serial Port, USB, and Network RJ-45 (via optional RDU101 network management card) as interface options. This directly names the physical management ports available. The APC unit specifies 'web-based management' but does not enumerate specific interface ports (USB, serial, RJ-45) in the provided specifications.

Noise level is specified only for the APC unit at 55 dB, relevant for installations in occupied or semi-open spaces. The Vertiv unit does not provide an acoustic specification in the available data. Operating temperature is documented for the Vertiv at 32°F–104°F (0°C–40°C) with a 10% derating note at 50°C; this parameter is not provided in the APC specifications. Buyers deploying in warm or high-ambient environments should verify APC's rated operating temperature range from the manufacturer's datasheet.

Which should you choose: the SRT5KXLT-IEC or the GXT5LI-5000MVRT3UXLN?

Our take: The GXT5LI-5000MVRT3UXLN is the stronger choice when maximum real-power output, lithium-ion longevity, and a documented certification stack are the primary requirements. Its 5,000 W real-power rating outdelivers the SRT5KXLT-IEC's 4,250 W by 750 W — roughly 18% more usable capacity at full VA — and its Li-Ion chemistry brings longer cycle life and faster recharge versus conventional battery alternatives. It also carries Energy Star 2.0 and UL 1973 Li-Ion listings not documented for the APC unit. Conversely, the SRT5KXLT-IEC is the stronger choice for facilities requiring a wide utility-input tolerance (100–275 V, 40–70 Hz), a specified Emergency Power Off circuit, and a quantified 2% output THD with 55 dB acoustics — specs absent from the Vertiv data provided. The APC unit suits installations on unstable or foreign utility feeds; the Vertiv suits modern high-density IT racks where Li-Ion runtime density and configurable output voltage matter most.

Side-by-Side Comparison

Spec-for-spec, from manufacturer data.

Frequently Asked Questions

Related Resources

• APC by Schneider Electric SRT5KXLT-IEC product page — full specs and to add to a quote
• Vertiv GXT5LI-5000MVRT3UXLN product page — full specs and to add to a quote