APC Smart-ups RT 48V Battery Pack - SURT48XLBP

APC by Schneider Electric SURT48XLBP 48V Rack-Mount Extended Battery Pack

Overview

The SURT48XLBP is a 2U rack-mount battery backup expansion pack from the APC by Schneider Electric Smart-UPS RT family, designed to extend runtime on compatible Smart-UPS RT UPS systems. Housed in a black, 2U rackmount chassis, it uses a sealed lead-acid battery chemistry — the industry standard for reliability and predictable discharge characteristics in continuous-duty power protection environments. If your critical load requires runtime beyond what the base UPS unit provides, the SURT48XLBP adds that capacity without requiring a separate power shelf or external enclosure.

For data centers, server rooms, network closets, and security infrastructure deployments where uptime is non-negotiable, an extended battery pack is a straightforward investment. The 2U form factor keeps the additional runtime capacity contained within your existing rack footprint.

Key Features

• Lead-Acid Battery Chemistry: Sealed lead-acid cells deliver predictable capacity curves and well-understood maintenance cycles — most enterprise facilities already have procedures for lead-acid battery replacement, so you're not introducing an unfamiliar technology into your power infrastructure.
• 2U Rack Form Factor: At 2 rack units, the SURT48XLBP fits standard 19-inch equipment racks without consuming excessive vertical space. Plan for 2U of free rack space adjacent to or near your base UPS unit before ordering.
• 48V Battery Architecture: The 48V design matches the Smart-UPS RT's internal bus voltage, which means the extended pack integrates directly with the UPS's battery management system — no additional converters or interface modules required for compatible models.
• Black Rackmount Chassis: The all-black finish is standard for data center and network room deployments where consistent rack aesthetics matter for organized, professional installations.
• Designed for Runtime Extension: Rather than replacing your base UPS, this pack supplements existing battery capacity — useful when load calculations show the base unit's runtime falls short of your minimum required holdover time during a utility outage.

Integration & Compatibility

The SURT48XLBP is designed for use with compatible APC Smart-UPS RT models that support external battery packs. Before purchasing, verify that your specific Smart-UPS RT UPS model lists the SURT48XLBP as a supported extended battery pack — not all Smart-UPS RT variants accept every battery extension SKU. Consult the UPS unit's documentation or APC's compatibility tool to confirm the match. Connecting an incompatible battery pack can prevent proper battery management system recognition.

Note: This product carries a California Proposition 65 warning for cancer and reproductive harm, which is standard for lead-acid battery products sold in California. This does not affect performance or suitability for use in commercial environments.

Frequently Asked Questions

Q: What UPS systems is the SURT48XLBP compatible with?

A: The SURT48XLBP is designed for compatible APC Smart-UPS RT models that support external 48V battery packs. Verify your specific UPS model's compatibility list before ordering — not all Smart-UPS RT variants support every extended battery SKU.

Q: What battery type does the SURT48XLBP use?

A: The SURT48XLBP uses sealed lead-acid batteries, the standard chemistry for enterprise UPS applications.

Q: How much rack space does the SURT48XLBP require?

A: The SURT48XLBP occupies 2U of rack space in a standard 19-inch equipment rack.

Q: Does the SURT48XLBP work as a standalone UPS?

A: No. The SURT48XLBP is a battery extension pack only — it requires a compatible APC Smart-UPS RT base unit to function. It does not include an inverter or power management electronics.

Q: Is the SURT48XLBP subject to any shipping or handling restrictions?

A: As a lead-acid battery product, the SURT48XLBP is subject to shipping regulations for batteries. It also carries a California Proposition 65 warning for cancer and reproductive harm, standard for lead-acid battery products.

James Everett

The SURT48XLBP is a 2U sealed lead-acid battery expansion pack purpose-built for the Smart-UPS RT platform. When I evaluate extended battery options for rack deployments, the first question is always whether the pack integrates cleanly with the UPS's battery management system — and at 48V, this unit is matched to the RT's internal architecture, which means the UPS electronics handle charge management and runtime estimation without needing any additional configuration.

Technical Highlights:

• 48V Battery Architecture: Voltage-matched to the Smart-UPS RT bus — the UPS BMS recognizes and manages the pack natively, giving accurate runtime estimates on the front panel or via NMC.
• Sealed Lead-Acid Chemistry: No active maintenance between replacement cycles; the sealed design prevents electrolyte spillage in a rack environment, which matters for mixed IT/power equipment installations.
• 2U Rackmount Form Factor: Keeps extended capacity in-rack without requiring a separate battery cabinet or floor-standing unit — relevant when you're working within a defined rack footprint in a colocation or equipment room environment.

Deployment Considerations:

• Confirm compatibility with your specific Smart-UPS RT model number before ordering — the RT family spans multiple voltage and capacity variants, and not every base unit accepts every extended battery SKU.
• Lead-acid batteries have a finite cycle life and are temperature-sensitive; runtime degradation will occur if the pack is stored or operated in environments outside the recommended temperature range, so factor ambient rack temperature into your installation planning.

The SURT48XLBP is the right choice for server rooms and network closets where the base Smart-UPS RT unit's runtime falls short of the minimum holdover needed to complete a clean shutdown or ride out a short utility outage — particularly in deployments where adding a floor-standing battery cabinet is not feasible.