APC Smart-ups XL Modular 48V Extended RUN Battery Pack - SUM48RMXLBP2U

APC by Schneider Electric SUM48RMXLBP2U 48V 2U Modular Extended Run Battery Pack

Overview

The APC by Schneider Electric SUM48RMXLBP2U is a 48V rackmount extended run battery pack designed to bolt directly into the Smart-UPS XL Modular ecosystem — adding backup runtime without replacing your base UPS unit. If you're protecting network closets, surveillance NVRs, or access control panels where a few extra minutes of runtime can mean the difference between a clean shutdown and corrupted data, this is the pack that extends your window. It occupies 2U of rack space (3.4" H × 17" W × 26.7" D) and delivers 1,300 VAh of additional capacity to the host UPS.

For integrators building out power protection infrastructure or specifying runtime extensions for enterprise deployments, the modular approach here is worth understanding: you don't need to upsize your UPS when runtime requirements grow — you stack additional APC by Schneider Electric battery packs as needed. That keeps capital costs flat and simplifies future expansion planning.

Key Features

• 1,300 VAh Extended Capacity: Each SUM48RMXLBP2U pack adds 1,300 volt-amp-hours of battery reserve to the host Smart-UPS XL system — translate that to tangible runtime based on your actual load. Lower connected loads yield proportionally longer protection windows, which matters for always-on network video recorders and access control systems that must stay live during extended outages.
• 48V Modular Architecture: The 48V DC bus matches the Smart-UPS XL Modular platform's internal voltage rail directly. There's no external inverter stage — the pack integrates natively, which keeps efficiency higher and reduces conversion losses compared to bolting on an incompatible external battery string.
• 2U Rackmount Form Factor: At 3.4" tall × 17" wide × 26.7" deep, the SUM48RMXLBP2U fits standard 19-inch EIA racks. Two units stack cleanly in 4U — useful in shallow telecom racks or dense IDF closets where depth clearance can be a constraint. Verify your rack depth before ordering: 26.7" requires a rack with at least 28" usable interior depth.
• Hot-Swap Compatible Platform: The Smart-UPS XL Modular family is designed for battery replacement without powering down the load — a meaningful operational advantage in 24/7 security and surveillance environments where scheduled downtime windows are difficult to arrange.
• Scalable Runtime Extension: Because the system is modular, you can add multiple packs to a single base unit. This makes the SUM48RMXLBP2U a practical fit for UPS runtime extension projects that need to meet specific runtime SLAs without a full UPS replacement.

Integration & Compatibility

The SUM48RMXLBP2U is engineered for the APC Smart-UPS XL Modular 48V platform. Confirm your host UPS accepts external battery packs via the modular bay before purchasing — not all Smart-UPS XL variants support the extended run configuration. Consult your host UPS documentation for the maximum number of packs supported per base unit and the resulting runtime curves at your specific load percentage.

Frequently Asked Questions

Q: What UPS systems is the SUM48RMXLBP2U compatible with?

A: The SUM48RMXLBP2U is designed for the APC Smart-UPS XL Modular 48V platform. Confirm your specific host UPS model accepts external battery packs before purchasing — check your host UPS documentation for the compatible battery pack list and maximum pack count per unit.

Q: How much additional runtime does the SUM48RMXLBP2U provide?

A: The pack delivers 1,300 VAh of additional capacity. Actual runtime added depends on the connected load on your host UPS — lower loads yield proportionally longer runtime. Consult APC's runtime calculator with your host UPS model and connected load for precise estimates.

Q: How many units of the SUM48RMXLBP2U can I connect to one host UPS?

A: The maximum number of external battery packs per base unit varies by host UPS model. Check your Smart-UPS XL Modular host unit's specification sheet for the supported pack count limit.

Q: Does the SUM48RMXLBP2U require a separate power connection?

A: No separate AC power connection is required — the pack connects to the host UPS via the modular battery interface. No external charger or inverter is needed; the host UPS manages charging and discharge automatically.

Q: What are the rack space requirements for the SUM48RMXLBP2U?

A: The unit occupies 2U (3.4" height) in a standard 19-inch rack. Depth is 26.7 inches — verify your rack has at least 28 inches of usable interior depth before mounting.

James Everett

The SUM48RMXLBP2U earns its place in serious rackmount deployments specifically because of that 1,300 VAh capacity figure paired with the 2U form factor — you're getting meaningful runtime extension without burning 4U or 6U of rack real estate. In a dense IDF closet protecting surveillance recorders and access control head-ends, that spatial efficiency matters as much as the electrical spec.

Technical Highlights:

• 1,300 VAh Capacity: Translates to substantial runtime extension at typical security infrastructure loads (NVRs, switches, access panels) — the exact minutes depend on load, but this is a full-scale extension pack, not a token buffer.
• 48V Native Bus Integration: Direct voltage match to the Smart-UPS XL Modular platform eliminates conversion stages, preserving system efficiency and simplifying the electrical design of the battery string.
• 2U Rackmount (3.4" × 17" × 26.7"): Fits standard 19-inch EIA racks; two packs stack in 4U — practical in the shallow racks common in security closets and IDF spaces where depth headroom is limited.

Deployment Considerations:

• At 26.7 inches deep, confirm rack interior clearance before ordering — this pack will not fit in racks with less than 28 inches usable depth, which eliminates some wall-mount and compact telecom enclosures.
• Compatibility is platform-specific: the SUM48RMXLBP2U only integrates with the Smart-UPS XL Modular 48V host. Verify your base UPS model before specifying this pack — not all Smart-UPS XL variants support external battery expansion.

For integrators deploying 24/7 surveillance infrastructure in facilities where scheduled downtime is not an option, the SUM48RMXLBP2U is the right lever when you need more runtime without replacing a functioning base UPS — particularly in multi-camera NVR environments where a longer bridge window protects both recording continuity and clean system shutdown.