Which UPS topology and output power quality better protects sensitive equipment?

The SUA3000RMXLI3U uses line-interactive topology with automatic voltage regulation (AVR), delivering a sinewave output at AC 220/230/240 V ±5%. Its surge energy rating is 480 joules with circuit-breaker protection. Total capacity is 2700 W / 3000 VA.

The SRT3000XLT uses double-conversion online topology, which regenerates output power continuously from the inverter, isolating connected equipment from all input anomalies — not just voltage sags and surges. Output is a sine wave at 208 V or 240 V (configurable) with less than 2% total harmonic distortion and a crest factor of 3:1. Capacity is identical at 2700 W / 3000 VA. It also includes both automatic and manual internal bypass.

For sites where power quality is consistently poor or where zero transfer time to battery is required (e.g., medical-grade or precision industrial loads), the SRT3000XLT's online topology provides inherently superior conditioning. The SUA3000RMXLI3U's line-interactive design is adequate for typical IT closets where brief transfer times (typically 2–6 ms) are acceptable, but its topology spec does not quantify transfer time — that figure is absent from the provided data.

Which unit offers better runtime flexibility and battery management for growing or critical deployments?

The SUA3000RMXLI3U provides a single internal lead-acid battery with up to 5.4 minutes of runtime at full load and a 3-hour recharge time. No external battery extension options are listed in the provided specifications. Battery capacity figures (VAh or voltage) are not specified.

The SRT3000XLT ships with one included battery module rated at 96 V / 497 VAh runtime capacity, with a rated charge power of 165 W and a 3-hour recharge time. Battery life is specified at 3–5 years, and the replacement cartridge is identified as APCRBC152 / SRT96RMBPUS. Critically, the SRT3000XLT supports up to 10 external SRT96BP battery packs, scaling runtime from the base 497 VAh up to 10,437 VAh — a more than 20× increase documented in the provided specs.

For deployments requiring extended runtime during prolonged outages — common in surveillance or security operations centers — the SRT3000XLT's documented scalability is a decisive structural advantage. The SUA3000RMXLI3U provides no equivalent extensibility per the supplied specification data.

Which unit provides better management, connectivity options, and physical integration into a rack?

The SUA3000RMXLI3U includes RS-232 (DB-9) and USB management interfaces, one free SmartSlot expansion slot for optional network management cards, and ships with a serial cable and USB cable. Output connectors are 1× IEC 60320 C19 and 8× IEC 60320 C13 — the standard IEC outlet mix for international IT equipment. It occupies 3U of rack space and weighs 139.33 lbs. Sound emission is 53 dBA.

The SRT3000XLT lists one free expansion slot (type not specified in provided data) but does not enumerate discrete serial or USB management ports in the supplied specifications. Output connectors are 2× NEMA L6-20R and 1× NEMA L6-30R — North American twist-lock receptacles incompatible with IEC-equipped gear without adapters. It is rack-mounted with a kit, front-mounted at the lower position, with vertical mounting orientation. Weight is 69.00 lbs and acoustic level is 55 dBA. Operating altitude is specified up to 10,000 ft; storage altitude up to 50,000 ft — neither figure is present for the SUA3000RMXLI3U.

The SUA3000RMXLI3U's 8× C13 + 1× C19 outlet complement directly serves IEC-standard rack PDUs and server PSUs common in international deployments. The SRT3000XLT's NEMA L6 outlets serve North American 208 V circuits but require adapters or compatible PDUs for standard C13/C14 gear. The SRT3000XLT is substantially lighter (69 lbs vs. 139.33 lbs), which is relevant for upper-rack placement. Neither unit's network management card capabilities are detailed beyond slot availability in the provided data.

Which should you choose: the SUA3000RMXLI3U or the SRT3000XLT?

Our take: The SRT3000XLT is the stronger choice when power conditioning quality and runtime scalability are the primary requirements — its double-conversion online topology eliminates transfer time entirely, its <2% THD output protects sensitive electronics more rigorously than line-interactive AVR, and its documented battery extension path scales from 497 VAh to over 10,437 VAh via up to 10 SRT96BP packs, versus the SUA3000RMXLI3U's fixed 5.4-minute full-load runtime with no extension option specified. The SUA3000RMXLI3U, however, is the correct selection for 230 V international installations: its IEC 60320 C13/C19 outlet complement, 220/230/240 V input/output, and compliance marks (VDE, EN 50091-1/2, C-Tick, GOST) are absent from the SRT3000XLT's specifications. The SRT3000XLT targets 208/240 V North American circuits with NEMA L6 receptacles. Platform match — voltage ecosystem and outlet type — should be confirmed before topology or runtime considerations.

Side-by-Side Comparison

Spec-for-spec, from manufacturer data.

Frequently Asked Questions

Related Resources

• APC by Schneider Electric SUA3000RMXLI3U product page — full specs and to add to a quote
• APC by Schneider Electric SRT3000XLT product page — full specs and to add to a quote