Which UPS delivers more usable power and how long will it run your load?

The CyberPower PRL1500RT2UC is rated at 1500 VA and 1500 W, yielding a power factor of 1.0. Published runtime at half load (750 W) is 18.7 minutes, and at full load (1500 W) is 8.7 minutes. Automatic Voltage Regulation employs a double-boost, single-buck topology, and the unit accepts an input voltage range of 70–155 VAC, providing broad tolerance for utility sag and swell conditions.

The APC SMTL1500RM3UCUS is rated at a maximum configurable output of 1.35 kW / 1.44 kVA — meaningfully lower than the CyberPower's 1500 W / 1500 VA ceiling. APC does not publish specific runtime-at-load figures in the provided specifications; the battery volt-amp-hour capacity is listed as 310 VAh and battery charge power as 154 W, but no half-load or full-load runtime minutes are stated. The APC spec sheet does not specify its input voltage range beyond 'auto-sensing 50/60 Hz ±3 Hz.'

On raw power capacity, the PRL1500RT2UC offers a higher watt ceiling (1500 W vs. 1350 W) and a unity power factor. Its runtime specs are explicitly published; the APC's are not present in the provided data, making direct runtime comparison impossible from spec alone.

How do the two units compare in physical size, weight, and environmental tolerance?

The CyberPower PRL1500RT2UC measures 17.1 in. (W) × 3.4 in. (H) × 19.7 in. (D) and weighs 54.2 lbs. It ships in a 22.1 × 10.8 × 24.4 in. carton at 68.3 lbs. The rack height is 2U. Operating temperature is 32–104 °F; operating humidity is 0–95% non-condensing; operating elevation is 0–9,843 ft; storage elevation reaches 49,213 ft.

The APC SMTL1500RM3UCUS measures 17.25 in. (W) × 5.14 in. (H) × 11.89 in. (D) and weighs 43 lbs. Shipping dimensions are 23 × 11 × 17.64 in. at an unspecified shipping weight. APC does not specify a rack-unit height in the provided data, but the 5.14 in. height corresponds to approximately 3U. The APC's depth of 11.89 in. is substantially shallower than the CyberPower's 19.7 in. — a critical advantage in short-depth rack cabinets. Operating temperature is identical at 32–104 °F; humidity is 0–95% non-condensing; operating elevation is 0–10,000 ft; storage elevation is 0–25,000 ft.

The APC unit is significantly lighter (43 lbs. vs. 54.2 lbs.) and dramatically shallower (11.89 in. vs. 19.7 in.), making it the practical choice for shallow-depth wall-mount racks and telco cabinets. The CyberPower occupies less height (2U vs. ~3U) but requires a deeper rack. APC holds the edge in storage elevation tolerance (25,000 ft vs. 49,213 ft for CyberPower — CyberPower actually leads here), and both share identical operating environment specs.

Which unit offers more comprehensive remote management and integration options?

The CyberPower PRL1500RT2UC ships with USB and RS-232 serial ports and includes a dry-contact relay and EPO (Emergency Power Off) input as standard. SNMP and cloud management are listed as available interfaces; however, per the specifications, network management card capability requires the optional RMCARD205 accessory — it is not built in. The unit ships with management cables (USB and EPO). Management software is PowerPanel® Business Edition. The connected equipment guarantee is $400,000.

The APC SMTL1500RM3UCUS provides an RJ-45 serial port, a USB port, and a Smart-Slot expansion bay for optional network management cards. The 'SmartConnect' designation in the model name implies cloud connectivity capability, but the provided specifications do not explicitly confirm built-in SmartConnect functionality beyond listing interface ports. No connected equipment guarantee figure is present in the provided specifications. The unit ships with an RS-232 signalling cable and USB cable.

Both units require an optional card for full SNMP network management. The CyberPower explicitly names and prices the optional RMCARD205 and states a $400,000 connected equipment guarantee; APC provides a Smart-Slot bay for an optional card but the provided specs do not name a connected equipment guarantee. CyberPower additionally specifies EPO and dry-contact relay as standard — specs the APC data does not address — which may be relevant in monitored server-room deployments requiring emergency shutdown integration.

Which should you choose: the PRL1500RT2UC or the SMTL1500RM3UCUS?

Our take: The PRL1500RT2UC is the stronger choice when maximum watt capacity, EPO/dry-contact integration, and a published runtime at load are primary decision criteria. CyberPower delivers a true 1500 W / 1500 VA at unity power factor versus APC's 1350 W / 1440 VA ceiling — a 150 W advantage relevant for high-density PoE switch or NVR loads. Runtime at half load is explicitly stated at 18.7 minutes; APC's runtime is not published in the provided spec data. CyberPower also adds a standard dry-contact relay, EPO port, and a $400,000 connected equipment guarantee not documented for the APC. Conversely, the SMTL1500RM3UCUS weighs 11.2 lbs. less and is 7.8 in. shallower, making it the only viable option for short-depth or wall-mount rack enclosures. Buyers with depth-constrained installations should specify the APC; those needing full watt headroom, EPO capability, or documented runtime figures should specify the CyberPower.

Side-by-Side Comparison

Spec-for-spec, from manufacturer data.

Frequently Asked Questions

Related Resources

• CyberPower PRL1500RT2UC product page — full specs and to add to a quote
• APC by Schneider Electric SMTL1500RM3UCUS product page — full specs and to add to a quote