CyberPower BP24VL2U01 2U Rackmount Extended Battery Module
Overview
The CyberPower BP24VL2U01 is a 2U rackmount extended battery module (EBM) purpose-built to expand the runtime of compatible CyberPower online UPS systems — specifically the OL3KRTHD. Housed in a metal enclosure with a black finish, it integrates four sealed lead-acid (VRLA) batteries wired to deliver a combined 24 VDC output at 9 Ah capacity. For IT closets, security head-end rooms, and network operations centers where an extended power bridge during generator transfer or prolonged outages is non-negotiable, the BP24VL2U01 adds usable runtime without adding a second standalone UPS to the rack.
VRLA (Valve-Regulated Lead Acid) chemistry means the batteries are sealed and maintenance-free — no topping off electrolyte, no venting hazard concerns in enclosed spaces, and no spill risk on adjacent equipment. That matters in dense 1U/2U server environments where you can't afford any maintenance-induced downtime adjacent to live hardware.
Key Features
- 4x Sealed Lead-Acid Cells, 12V / 9 Ah Each: Four individual VRLA batteries wired in series to produce the 24 VDC bus the OL3KRTHD demands. At 9 Ah per cell, the pack delivers meaningful additional runtime on a 3kVA load — the exact extension depends on your actual load percentage, but this is the right module if your baseline runtime at full load isn't meeting your generator transfer window.
- 2U Rackmount Form Factor: Takes 2U of rack space (87 mm H × 433 mm W × 470 mm D) and mounts directly below or adjacent to the host UPS in a standard 19-inch rack. The depth of 470 mm fits shallow-depth 4-post racks commonly used in security and telecom head-ends without requiring an extended-depth rail kit.
- Metal Housing: The all-metal chassis resists deformation under rack load and provides a degree of EMI shielding — relevant when the module sits physically adjacent to network switching or video recording equipment running high-frequency switching power supplies.
- Tower-Convertible: While rackmount is the primary use case, the BP24VL2U01 also supports tower orientation for standalone or floor-mounted deployments — useful in small security closets not yet fitted with rack infrastructure.
- 0–40°C Operating Range: Rated for operation in ambient temperatures from 0°C to 40°C. In practice, VRLA batteries perform closest to rated capacity at 20–25°C; capacity de-rates at the high end of this range. If your rack room runs consistently above 30°C, expect modestly reduced effective runtime and accelerated calendar life.
- RoHS Compliant: Meets RoHS requirements, which matters for enterprise procurement teams that enforce hazardous-substance compliance across data center hardware purchases.
- Wide Storage Temperature Window: Storage is rated from -15°C to 45°C, which gives reasonable flexibility for warehouse staging or temporary cold-storage between installation projects without risking battery damage from thermal excursion.
Integration & Compatibility
The BP24VL2U01 is verified compatible with the CyberPower OL3KRTHD online UPS. It is not a universal EBM — the 24 VDC bus voltage and the physical connector type are matched to that host unit. Before ordering, confirm your UPS model number: installing a mismatched EBM either results in a non-functional connection or, in worst cases, a fault condition on the host UPS. If you are building out a power and UPS stack for a multi-camera surveillance head-end or network closet, pair this module with the OL3KRTHD and size your runtime budget against your actual watt load — not the UPS VA rating.
For deeper runtime planning on surveillance-specific installations, the IP camera and NVR loads should be measured at the PDU level before specifying how many EBM units are needed. A single BP24VL2U01 may be sufficient for a 10–15 minute generator transfer window at moderate load; a longer bridge requires stacking additional modules if the host UPS supports daisy-chaining.
Browse the full CyberPower power protection line for compatible UPS platforms and accessories. For rack-level power distribution that pairs with this module, see the power distribution unit category.
Frequently Asked Questions
Q: Which UPS models is the BP24VL2U01 compatible with?
A: CyberPower lists the OL3KRTHD as the verified compatible host UPS for the BP24VL2U01. The module's 24 VDC bus and connector are matched to that unit. Do not assume compatibility with other CyberPower online UPS models without confirming the EBM bus voltage matches.
Q: How many BP24VL2U01 modules can be connected to a single OL3KRTHD?
A: The number of EBM units the OL3KRTHD supports in a daisy-chain configuration is specified in the OL3KRTHD user manual. The BP24VL2U01 itself does not impose a hard limit — the host UPS firmware and battery charger capacity determine the maximum number of modules. Consult the OL3KRTHD documentation for the authoritative figure before purchasing multiple units.
Q: What battery technology does the BP24VL2U01 use, and is it maintenance-free?
A: The BP24VL2U01 uses sealed lead-acid (VRLA) batteries — four cells at 12V / 9 Ah each. VRLA batteries are valve-regulated and sealed, making them maintenance-free. No electrolyte top-off is required, and there is no venting of hydrogen gas under normal conditions, making them safe for enclosed rack environments.
Q: What are the operating temperature limits for the BP24VL2U01?
A: The module is rated for operation from 0°C to 40°C. VRLA battery capacity is optimized around 20–25°C; expect de-rated runtime and shortened service life if the unit is operated continuously at the upper end of that range. Storage is rated from -15°C to 45°C.
Q: Does the BP24VL2U01 fit a standard 19-inch rack?
A: Yes. The BP24VL2U01 occupies 2U of rack space with dimensions of 87 mm H × 433 mm W × 470 mm D. It mounts in a standard 19-inch rack. The 470 mm depth is compatible with most mid-depth and full-depth 4-post racks; verify your rack's usable depth before ordering if you are working with a shallow-depth enclosure.
Q: Is the BP24VL2U01 RoHS compliant?
A: Yes. The BP24VL2U01 carries RoHS compliance certification, meeting the EU Restriction of Hazardous Substances directive. This is relevant for enterprise and government procurement requirements that mandate RoHS compliance across data center and power protection hardware.
The BP24VL2U01 is a focused solution for a specific problem: the OL3KRTHD has a defined runtime at rated load, and when that runtime doesn't cover your generator transfer window or your facility's required bridging time, this module is how you extend it. Four 12V / 9 Ah VRLA cells wired in series to 24 VDC — straightforward architecture, no active electronics to fail, just sealed chemistry in a 2U metal chassis.
Technical Highlights:
- 24 VDC / 9 Ah VRLA Pack: Four sealed lead-acid cells deliver the 24V bus the OL3KRTHD expects. At 9 Ah, this is a mid-capacity EBM — meaningful for bridging a 3–10 minute generator transfer window at loads in the 1,500–2,000W range, but not a substitute for a properly sized UPS if your load is consistently near the 3kVA ceiling.
- 2U Rackmount at 470 mm Depth: Fits most standard 4-post racks without extended rails. The 433 mm width and 87 mm height are standard 2U rackmount profile — installs with the same rail hardware as most 1U/2U servers. Dual orientation (rack or tower) gives you flexibility in non-standard installations.
- RoHS Compliance: Relevant for public-sector and enterprise procurement workflows that require hazardous-substance documentation at the component level. The certification is listed; confirm it meets your specific project's compliance documentation requirements.
Deployment Considerations:
- VRLA battery service life is temperature-sensitive. The 0–40°C operating range is the functional window, but prolonged operation above 30°C will measurably shorten calendar life — plan for battery replacement cycles accordingly, especially in warm telecom closets without dedicated cooling.
- This module is verified for the OL3KRTHD only. The 24 VDC bus voltage is not universal across CyberPower's EBM line — confirm your host UPS model number before ordering. A mismatched EBM will not function and may trigger a fault on the host unit.
The BP24VL2U01 is the right spec for a security operations center or surveillance head-end running an OL3KRTHD where the stock runtime at 40–60% load falls short of the site's 10-minute power continuity requirement — exactly the scenario where adding one EBM resolves the gap without replacing the UPS.
