Which UPS topology and protection architecture better matches the load's sensitivity requirements?

The CP1000PFCLCD uses a line-interactive topology with automatic voltage regulation (AVR) via a buck-boost transformer. In normal operation, utility power feeds the load directly through the AVR stage, with the battery only engaging during outages or when input voltage falls outside the 88–144 VAC operating window. Transfer to battery takes 4 milliseconds per spec. Output waveform is pure sine wave with THD under 3% at full load. Surge protection is rated at 1020 joules, and the unit includes full-time AVR without switching to battery for minor voltage deviations.

The SURT1000RMXLI uses a double-conversion online topology. In this architecture, incoming AC is continuously rectified to DC to charge the battery and simultaneously inverted back to AC for the load — meaning the load never draws directly from raw utility power. Transfer time to battery is effectively zero, as the inverter is always active. Output is a sine wave with harmonic distortion specified at less than 3%. Surge energy rating is 420 joules, and the unit includes full-time multi-pole noise filtering with IEEE surge let-through rated at zero. A built-in bypass is included.

For loads tolerant of minor voltage fluctuations and brief transfer gaps, the CP1000PFCLCD's line-interactive design is adequate. For loads requiring seamless, zero-transfer-time power conditioning — such as servers, medical equipment, or precision instrumentation — the SURT1000RMXLI's online double-conversion topology provides a materially higher protection level. The SURT1000RMXLI's crest factor is specified at 3:1, indicating headroom for non-linear loads; the CP1000PFCLCD does not spec a crest factor.

How does each unit's usable capacity, runtime, and battery management compare at rated load?

The CP1000PFCLCD is rated at 1000 VA / 600 W. At full load (600 W), the specified runtime is 2 minutes; at half load (300 W), runtime extends to 6 minutes. The battery is a sealed lead-acid unit at 12 V / 9 Ah and is user-replaceable (RB1270X2C). Automatic self-test runs every two weeks; the battery charger capacity is not specified. USB charging ports (Type-A and Type-C) are integrated, though these do not contribute to UPS output capacity per the specs.

The SURT1000RMXLI is rated at 1000 VA / 700 W — a 100 W higher real-power rating than the CP1000PFCLCD at the same VA. Runtime figures at specific load levels are not provided in the supplied specifications. The battery recharge time is specified at 3 hours, with a charger rated at 109 W. Battery type is lead-acid with a rated life of 3–5 years. Battery capacity (Ah) and user-replaceability are not specified in the provided data.

On raw power capacity, the SURT1000RMXLI's 700 W rating versus the CP1000PFCLCD's 600 W gives it a 17% advantage in watts at the same VA. The CP1000PFCLCD provides explicit runtime figures and a confirmed user-replaceable battery. The SURT1000RMXLI provides a recharge time figure but no runtime data in the supplied specs — buyers requiring confirmed runtime data for the SURT1000RMXLI must consult APC's runtime curves.

Which unit's physical format, regional voltage, and management capabilities better suit the target installation environment?

The CP1000PFCLCD is a mini-tower unit (3.94 × 9.7 × 10.24 in, 15.39 lb) designed for desktop or floor placement. It is built for 120 VAC North American environments (88–144 VAC input range). Outlets are 10 × NEMA 5-15R. Management interfaces include USB (HID-compliant) and serial (dry-contact relay), with an integrated multifunction color LCD displaying load, voltage, battery, runtime, and fault conditions. CyberPower PowerPanel software supports Windows, macOS, and Linux. Network line protection is provided via RJ45 (1 in / 1 out). The unit carries UL1778 and cUL 107.3 certifications and is ENERGY STAR certified.

The SURT1000RMXLI is a 2U rack-mounted unit (43.2 × 8.5 × 48.3 cm, 23 kg) designed for installation in standard 19-inch equipment racks. It is built for 230 VAC environments (160–280 VAC input range), covering European and international single-phase voltages. Input connection is IEC 60320 C14; output provides 6 × IEC 60320 outlets plus 2 IEC jumper outlets. The unit includes 1 free expansion slot. Acoustic level is rated at 50 dBA; heat dissipation is 324 Btu/h. Certifications include CE, VDE, C-Tick, GOST, and UK PSTI. Management interface specifics beyond the physical form are not provided in the supplied specs. IP protection is IP20.

These two units are not interchangeable from a deployment standpoint: the CP1000PFCLCD targets North American 120 V desktop or small-office environments, while the SURT1000RMXLI targets 230 V international rack environments. An installer must confirm regional voltage and outlet/inlet compatibility before cross-shopping these units.

Which should you choose: the CP1000PFCLCD or the SURT1000RMXLI?

Our take: The CP1000PFCLCD is the stronger choice when the installation site is North American 120 VAC, the load fits a desktop or floor-standing form factor, and explicit runtime data and user-serviceable batteries are required. The SURT1000RMXLI is the stronger choice when the site operates on 230 VAC, rack integration is mandatory, and the load demands zero-transfer-time double-conversion protection. Three concrete spec deltas drive the distinction: topology (line-interactive with 4 ms transfer vs. double-conversion online with zero transfer), real-power capacity (600 W vs. 700 W at the same 1000 VA), and form factor (mini-tower 15.39 lb vs. 2U rack 23 kg). Neither unit is suitable for the other's target voltage region — 120 V vs. 230 V is a hard boundary. Buyers in North America protecting workstations or network gear should evaluate the CP1000PFCLCD; those racking servers in 230 V environments and requiring continuous online conditioning should evaluate the SURT1000RMXLI.

Side-by-Side Comparison

Spec-for-spec, from manufacturer data.

Frequently Asked Questions

Related Resources

• CyberPower CP1000PFCLCD product page — full specs and to add to a quote
• APC by Schneider Electric SURT1000RMXLI product page — full specs and to add to a quote