What are the differences in power architecture, output capability, and load protection between the SMX2000LV and UPX-EXPANRUN-OL20?

The SMX2000LV uses a Line-Interactive topology with a sine wave output, rated at 1920VA / 1800W with 120V AC output across six NEMA 5-15R, three NEMA 5-20R, and one NEMA L5-20R receptacles. Transfer time is specified at 2–4 ms typical, 8 ms maximum. Input is via a NEMA 5-20P plug, and harmonic distortion is listed at less than 5%.

The UPX-EXPANRUN-OL20 uses an Online (double-conversion) topology, rated at 2000VA. Its AC output is 110–127 VAC at 15A via NEMA 5-15R receptacle(s), and it also exposes a 48 VDC output bus. Input is via a NEMA 5-15P plug. Online topology provides zero transfer time to battery since the load is continuously powered from the inverter. Wattage (W) rating is not specified in the provided specs for the UPX-EXPANRUN-OL20.

Key distinction: the SMX2000LV provides a higher confirmed watt rating (1800W) and a wider receptacle mix, while the UPX-EXPANRUN-OL20's Online topology eliminates transfer-time risk entirely. The 48 VDC output on the Middle Atlantic unit is notable for AV and security panel loads that accept DC directly, but its continuous watt capacity is not stated in the provided specs.

How do the two units compare in rack footprint, weight, and runtime expandability?

The SMX2000LV occupies 4U of rack space and weighs 85.0 lbs (38.64 kg). Its internal battery delivers 690 VAh at a 229W rated load. The unit supports external battery expansion via SMX120BP modules: one module adds 2,070 VAh, scaling to 14,490 VAh with ten modules. Internal battery life is specified at 3–5 years, with a typical recharge time of 3 hours and a replacement battery cross-reference of APCRBC143. Power cord is 8 ft (2.44 m) with a NEMA 5-20P plug.

The UPX-EXPANRUN-OL20 occupies 2U and weighs 63.9 lbs (29 kg), making it physically lighter and shallower (16 in / 40.6 cm depth vs. the APC's shipping depth of approximately 24.94 in). Power cord is 6 ft (1.8 m) with a NEMA 5-15P plug. The product name includes 'RUN Time Unit,' and the model number contains 'EXPANRUN,' suggesting this unit is itself a runtime expansion module within the Nexsys ecosystem, though the spec set does not explicitly document a standalone internal battery runtime figure or an external expansion module path beyond the base unit.

For installations with tight rack space budgets, the UPX-EXPANRUN-OL20's 2U footprint is a clear advantage. For installations requiring documented, scalable extended runtime, the SMX2000LV's published expansion matrix (up to 14,490 VAh via chained modules) provides a concrete upgrade path.

Which unit offers more comprehensive monitoring, management, and software integration capabilities?

The SMX2000LV provides a multi-function LCD front panel displaying UPS status, load percentage, battery state, configuration menus, and diagnostics, supplemented by LED indicators for online, on-battery, replace-battery, overload, and fault states. Communication interfaces include USB (HID-compliant), DB9 RS-232, an EPO (Emergency Power Off) contact closure, and one SmartSlot expansion slot for optional network management cards. With a network card installed, the unit supports SNMP and web-based monitoring, APC PowerChute Network Shutdown software, remote access, event logging, and firmware updates.

The UPX-EXPANRUN-OL20's spec set lists 'NEXSYS UPS' as a special feature and references FCC, RoHS, and patent certifications. No front-panel display, communication interface types, software compatibility, SNMP support, remote monitoring capability, or management port specifications are documented in the provided specs. TAA compliance is listed as No.

For installations requiring documented SNMP integration, shutdown software, or remote monitoring, the SMX2000LV provides a fully specified management stack. The UPX-EXPANRUN-OL20's management and integration capabilities cannot be assessed from the provided spec data.

Which should you choose: the SMX2000LV or the UPX-EXPANRUN-OL20?

Our take: The SMX2000LV is the stronger choice when documented management depth, a confirmed watt rating, and a scalable extended-runtime path are required. It specifies 1800W continuous output, a 2–4 ms transfer time, USB/RS-232/SmartSlot interfaces, SNMP-capable expansion, and a published battery expansion matrix scaling from 690 VAh to 14,490 VAh. The UPX-EXPANRUN-OL20 holds three concrete advantages: Online (double-conversion) topology eliminates transfer time entirely, its 2U footprint saves two rack units over the SMX2000LV's 4U, and its 48 VDC output bus serves security panels and AV equipment that accept DC directly. However, continuous watt rating, runtime figures, and management interface specs are absent from the provided data for the Middle Atlantic unit. Installers protecting sensitive loads that cannot tolerate any transfer gap should weight the Online topology heavily; integrators needing auditable remote monitoring and expandable runtime with full spec documentation should weight the SMX2000LV's published capabilities.

Side-by-Side Comparison

Spec-for-spec, from manufacturer data.

Frequently Asked Questions

Related Resources

• APC by Schneider Electric SMX2000LV product page — full specs and to add to a quote
• Middle Atlantic UPX-EXPANRUN-OL20 product page — full specs and to add to a quote