APC by Schneider Electric SMTL1500RM3UCUS vs Middle Atlantic UPX-EXPANRUN-OL15: Specification Comparison
Both the APC Smart-UPS Lithium-Ion SMTL1500RM3UCUS and the Middle Atlantic Nexsys UPX-EXPANRUN-OL15 are rack-mounted 1500VA uninterruptible power supplies targeting professional AV, security, and IT infrastructure deployments. This comparison evaluates them across power delivery and waveform quality, physical and battery characteristics, and management and integration capabilities — the three axes most relevant to installers and IT buyers selecting a 1500VA rack UPS for mission-critical loads.
In This Guide
- How do the two units differ in power delivery, topology, and output quality?
- What are the battery technology, runtime expectations, and physical footprint differences?
- Which unit offers more management, monitoring, and ecosystem integration options?
- Which should you choose: the SMTL1500RM3UCUS or the UPX-EXPANRUN-OL15?
- Side-by-Side Specs
- FAQ
How do the two units differ in power delivery, topology, and output quality?
The SMTL1500RM3UCUS is rated at 1,350W / 1,440VA usable output and produces a pure sine wave with output voltage distortion specified at less than 5%. It operates in a line-interactive topology with a 6ms typical / 10ms maximum transfer time, and its output frequency synchronizes to mains at 50/60 Hz ±3 Hz. The surge energy rating is 680 joules with full-time multi-pole noise filtering rated at 0.3% IEEE surge let-through and zero clamping response time.
The UPX-EXPANRUN-OL15 carries a 1500VA rating and lists an AC output range of 110–127 VAC at 15 amps. Critically, it also specifies a 48 VDC output, and its topology is listed as Online (double-conversion), which provides a 0ms transfer time by definition — a meaningful architectural distinction. However, waveform type, output voltage distortion, surge joule rating, and filtering specifications are not provided in the available spec data for this unit.
What are the battery technology, runtime expectations, and physical footprint differences?
The SMTL1500RM3UCUS uses a Lithium-Ion battery with a specified expected life of 5–10 years, a typical recharge time of 2 hours, and a battery volt-amp-hour capacity of 310 VAh. Its physical footprint is 3U (5.14" H × 17.25" W × 11.89" D) and it weighs 43 lbs — notably compact given the short-depth design (under 12 inches deep), which is a key differentiator for shallow rack enclosures.
The UPX-EXPANRUN-OL15 occupies 2U (3.5" H × 19" W × 16" D) and weighs 61.7 lbs, substantially heavier. Battery chemistry, expected battery life, and recharge time are not specified in the available data. The product name indicates it is a 'Run Time Unit,' suggesting it functions as a runtime expansion module within the Nexsys ecosystem rather than a fully self-contained standalone UPS — this is a critical distinction. Battery warranty is listed as 3 years.
Which unit offers more management, monitoring, and ecosystem integration options?
The SMTL1500RM3UCUS provides an RJ-45 serial port, USB interface, and an APC Smart-Slot expansion bay for optional network management cards. It includes a multi-function LCD status and control console on the front panel, configurable audible alarms (on-battery and low-battery), and ships with software on CD. It is TAA-compliant and carries UL 1778, CSA C22.2 No. 107.3, FCC Part 15 Class A, UL 1973, NOM, and RoHS approvals. The SmartConnect feature implies cloud-based monitoring capability.
The UPX-EXPANRUN-OL15 lists FCC (CSA field) and RoHS compliance. TAA compliance is explicitly listed as No. Interface ports, front-panel controls, alarm behavior, software, and network management options are not specified in the available data. As a Nexsys-platform component, integration is assumed to occur within the Middle Atlantic Nexsys UPS ecosystem, but no standalone management interfaces are documented in the provided specifications.
Which should you choose: the SMTL1500RM3UCUS or the UPX-EXPANRUN-OL15?
Our take: The SMTL1500RM3UCUS is the stronger choice when a fully self-contained, standalone 1500VA UPS with documented management interfaces and a long-life battery is required. Key spec deltas: the APC unit uses Lithium-Ion chemistry rated for 5–10 years versus an unspecified battery type in the Middle Atlantic unit (3-year battery warranty only); the APC unit is 43 lbs versus 61.7 lbs and fits in just 11.89 inches of rack depth (3U) versus 16 inches (2U) for the Middle Atlantic — a decisive advantage in shallow-depth racks. The APC also provides RJ-45, USB, and Smart-Slot management ports with a front LCD, while the Middle Atlantic unit lists no management interfaces in available specs. The UPX-EXPANRUN-OL15 may be the correct selection only within an existing Middle Atlantic Nexsys deployment where it functions as a runtime expansion module and its online topology is an ecosystem requirement — buyers should confirm it is not a dependent accessory before cross-shopping it as a standalone UPS replacement.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | APC by Schneider Electric SMTL1500RM3UCUS | Middle Atlantic UPX-EXPANRUN-OL15 |
|---|---|---|
| VA Rating | 1,440 VA | 1,500 VA |
| Max Output Power (Watts) | 1,350 W | Not specified |
| Topology | Line-interactive | Online (double-conversion) |
| Waveform Type | Sine wave | Not specified |
| Output Voltage Distortion | Less than 5% | Not specified |
| Transfer Time | 6 ms typical / 10 ms max | 0 ms (online topology) |
| Output Voltage (AC) | Not specified | 110–127 VAC |
| Output Voltage (DC) | Not specified | 48 VDC |
| Battery Type | Lithium-Ion | Not specified |
| Expected Battery Life | 5–10 years | Not specified (3-yr warranty) |
| Typical Recharge Time | 2 hours | Not specified |
| Rack Height | 3U (5.14 in) | 2U (3.5 in) |
| Depth | 11.89 in (302 mm) | 16 in (406 mm) |
| Width | 17.25 in (438 mm) | 19 in (483 mm) |
| Weight | 43 lbs (19.5 kg) | 61.7 lbs (28 kg) |
| TAA Compliant | Yes | No |
| Management Interfaces | RJ-45, USB, Smart-Slot | Not specified |
| Surge Energy Rating | 680 joules | Not specified |
| Operating Temperature | 32°–104°F (0°–40°C) | 32°–104°F (0°–40°C) |
| Input Voltage | Not specified | 120 VAC |
| RoHS Compliant | Yes | Yes |
Frequently Asked Questions
Which should you choose: the SMTL1500RM3UCUS or the UPX-EXPANRUN-OL15?
The SMTL1500RM3UCUS is the stronger choice when a fully self-contained, standalone 1500VA UPS with documented management interfaces and a long-life battery is required. Key spec deltas: the APC unit uses Lithium-Ion chemistry rated for 5–10 years versus an unspecified battery type in the Middle Atlantic unit (3-year battery warranty only); the APC unit is 43 lbs versus 61.7 lbs and fits in just 11.89 inches of rack depth (3U) versus 16 inches (2U) for the Middle Atlantic — a decisive advantage in shallow-depth racks. The APC also provides RJ-45, USB, and Smart-Slot management ports with a front LCD, while the Middle Atlantic unit lists no management interfaces in available specs. The UPX-EXPANRUN-OL15 may be the correct selection only within an existing Middle Atlantic Nexsys deployment where it functions as a runtime expansion module and its online topology is an ecosystem requirement — buyers should confirm it is not a dependent accessory before cross-shopping it as a standalone UPS replacement.
Is the SMTL1500RM3UCUS or UPX-EXPANRUN-OL15 better for shallow rack cabinets?
The SMTL1500RM3UCUS is explicitly designed as a short-depth unit at 11.89 inches deep, making it well-suited for shallow rack enclosures. The UPX-EXPANRUN-OL15 is 16 inches deep and requires between 18 and 32 inches of mounting depth per its spec, so it is not appropriate for shallow racks.
Which unit has a longer-lasting battery and lower replacement cost over time?
The SMTL1500RM3UCUS specifies a Lithium-Ion battery with an expected life of 5–10 years. The UPX-EXPANRUN-OL15 does not specify battery chemistry or expected lifespan in the available data; only a 3-year battery warranty is noted. On documented specs alone, the APC unit has the better-defined long-term battery cost profile.
Can the UPX-EXPANRUN-OL15 be used as a direct drop-in replacement for the SMTL1500RM3UCUS?
Not necessarily. The UPX-EXPANRUN-OL15 is described as a 'Run Time Unit' within the Middle Atlantic Nexsys UPS ecosystem, which suggests it may function as a dependent runtime expansion module rather than a fully standalone UPS. It also outputs 48 VDC in addition to AC, which is atypical for a conventional standalone UPS. Buyers should confirm with Middle Atlantic whether the unit operates independently before considering it a direct substitute.
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