APC by Schneider Electric SMX48RMBP2US External Battery Pack for Smart-UPS X Series
Overview
The APC by Schneider Electric SMX48RMBP2US is a 48V sealed lead-acid external battery extension pack engineered to pair with compatible Smart-UPS X-series uninterruptible power supplies, delivering additional runtime in server rooms, network closets, and surveillance infrastructure deployments where an extended power window is non-negotiable. Built into a 2U rackmount chassis that also converts to tower orientation, the SMX48RMBP2US fits cleanly into existing rack installations without demanding a dedicated enclosure or out-of-row footprint. If your operation runs cameras, NVRs, or edge compute continuously and a standard UPS runtime leaves you short during extended outages, this is the battery extension unit to evaluate first within the APC by Schneider Electric power protection catalog.
Key Features
- 48V Sealed Lead Acid (VRLA) Chemistry: Valve-regulated lead acid batteries are maintenance-free — no fluid checks, no venting requirements beyond standard equipment room ventilation. That matters in locked server cabinets or low-access network closets where routine battery maintenance is a scheduling headache.
- 2U Rackmount Form Factor (432 × 490 × 89 mm): At 89mm tall and 432mm wide, this unit occupies exactly 2U in a standard 19-inch rack. The 490mm depth fits most mid-depth and full-depth rack enclosures. If your rack is shallow (under 500mm usable depth), verify clearance before ordering — the unit itself is 490mm before cable management.
- Rackmount/Tower Convertible: The chassis supports both rack and tower orientations, so it can deploy alongside a tower-format UPS without requiring a separate rack. For staged deployments where infrastructure grows from a tower stack into a full rack, this flexibility prevents premature hardware replacement.
- Black Finish, 1-Unit Quantity: Ships as a single battery pack in black. If your runtime requirement demands more than one extension unit, verify the maximum number of supported packs against your specific Smart-UPS X model before stacking — daisy-chaining beyond the UPS limit will not extend runtime further and may cause configuration errors.
- RoHS Compliant: RoHS compliance means the unit meets EU restrictions on hazardous substances — relevant for deployments in regulated environments, government facilities, or organizations with environmental procurement mandates. It is also a common prerequisite for e-waste disposal programs when the batteries reach end-of-life.
- REACH Certified: REACH certification addresses chemical safety under EU regulation, which matters for multinational organizations standardizing procurement across EU and non-EU sites under a single SKU.
- Package Dimensions and Weight (589 × 620 × 246 mm, 35.4 kg): At 35.4 kg shipped, this unit requires two people or mechanical assistance for rack installation. Plan lift equipment or a second installer accordingly — attempting a solo rack mount at this weight is a safety and equipment damage risk.
Integration and Compatibility
The SMX48RMBP2US is designed for use with APC Smart-UPS X-series UPS units that support external battery packs via the dedicated battery connector interface. It is not a standalone UPS — it provides no inverter, no output conditioning, and no management interface on its own. It must be connected to a compatible parent UPS to function. Before purchasing, confirm your Smart-UPS X model's external battery pack specification against this unit's 48V VRLA configuration. Incompatible voltage or connector mismatch will prevent operation entirely.
For environments running network video recorders, surveillance servers, or access control panels on UPS-backed circuits, an external battery pack like this one extends the runtime window that keeps recording and door-control systems operational during a grid event — the exact scenario where a standard UPS runtime of a few minutes falls short. Pair with a UPS that includes network management card support if you need remote runtime monitoring and graceful shutdown orchestration across your power protection infrastructure.
If you are designing a new rack installation and need guidance on UPS sizing, runtime calculations, or battery redundancy architecture, review the power protection buying guide before specifying battery extension quantities. Runtime scales with load — a lightly loaded UPS will see proportionally longer extension than a fully loaded one, and APC's runtime calculator is the authoritative tool for that estimate.
Frequently Asked Questions
Q: Is the SMX48RMBP2US a standalone UPS or a battery extension only?
A: It is a battery extension pack only. The SMX48RMBP2US has no inverter, no output power conditioning, and no management interface. It must be connected to a compatible APC Smart-UPS X-series UPS to provide any runtime benefit.
Q: What battery technology does the SMX48RMBP2US use?
A: The unit uses sealed lead acid (VRLA) batteries at 48V. VRLA batteries are maintenance-free and require no fluid checks, making them suitable for server room and network closet deployments with limited access.
Q: How much rack space does the SMX48RMBP2US require?
A: The SMX48RMBP2US occupies 2U (89mm height) in a standard 19-inch rack. The unit depth is 490mm — verify your rack's usable internal depth before installation.
Q: Can the SMX48RMBP2US be used in a tower configuration?
A: Yes. The chassis supports both rackmount and tower orientations, so it can be deployed alongside a tower-format Smart-UPS X unit without requiring a rack enclosure.
Q: Is the SMX48RMBP2US RoHS compliant?
A: Yes. The SMX48RMBP2US carries both RoHS and REACH certifications, meeting EU restrictions on hazardous substances and chemical safety requirements.
Q: How heavy is the SMX48RMBP2US when shipped?
A: The packaged unit weighs 35.4 kg (approximately 78 lbs). Two people or mechanical lifting assistance are recommended for rack installation.
The SMX48RMBP2US is a 48V VRLA battery extension pack — not a UPS in its own right, and that distinction is the first thing I check when a client is specifying extended runtime for a surveillance or access control rack. At 35.4 kg packaged, this is not a one-person installation job, and I have seen integrators underestimate that on a field visit, which creates both a safety issue and a rack-damage risk when mounting at 2U height.
Technical Highlights:
- 48V VRLA Chemistry: Sealed lead acid at 48V is the standard configuration for Smart-UPS X extended battery packs — maintenance-free operation means no scheduled battery fluid checks, and the valve-regulated design eliminates the venting requirements that would otherwise complicate deployment in sealed network closets.
- 2U / 432 × 490 × 89 mm Form Factor: The 490mm depth is the spec to watch. Mid-depth racks (typically 600–700mm usable) accommodate this without issue, but shallow wall-mount enclosures under 500mm usable depth will not. Confirm internal rack depth, not external cabinet depth, before the unit ships.
- RoHS + REACH Dual Certification: For clients running EU-compliant procurement programs or operating in regulated verticals, having both certifications on a single SKU simplifies compliance documentation at purchase and at battery end-of-life disposal.
Deployment Considerations:
- This unit provides zero function without a compatible Smart-UPS X parent UPS connected — verify connector and voltage compatibility against your specific UPS model before ordering, since a mismatch means a return shipment of a 35 kg unit.
- Runtime extension is load-dependent: the heavier the load on the parent UPS, the shorter the runtime gain. Use APC's published runtime tables or online calculator with your actual load wattage before specifying how many extension packs the deployment requires.
For a surveillance head-end or access control server rack where extended outage tolerance — 30 minutes or more at full load — is a design requirement rather than a nice-to-have, the SMX48RMBP2US is the correct starting point within the Smart-UPS X battery extension family, provided the parent UPS and rack depth checks clear first.
