CyberPower BM120V30ATY 120V Rackmount Battery Module
Overview
The CyberPower BM120V30ATY is a 120VDC sealed lead-acid (VRLA) battery module designed for rackmount UPS systems where extended runtime or battery replacement capacity is the primary concern. At 3U in a silver metal chassis measuring 117 mm tall × 236 mm wide × 610 mm deep, it slots cleanly into standard 19-inch racks without consuming disproportionate rack space. If you're managing a UPS power infrastructure for a security operations center, server room, or surveillance head-end, this module provides an incremental path to longer backup windows without replacing the base UPS unit.
The BM120V30ATY uses a valve-regulated lead-acid (VRLA) chemistry — the same maintenance-free sealed technology that makes battery replacement predictable and safe in enclosed rack environments. No venting requirements, no liquid electrolyte handling. This is a purpose-built rackmount battery expansion, not a general-purpose UPS — compatibility with the host CyberPower UPS chassis is the first thing to confirm before ordering.
Key Features
- 120VDC / 8Ah VRLA Chemistry: Sealed lead-acid construction means no scheduled electrolyte maintenance and no venting requirements for enclosed rack cabinets. The 8Ah capacity adds meaningful runtime headroom when paired with a compatible CyberPower UPS unit — exact additional runtime depends on the connected load, so calculate watt-hours (120V × 8Ah = 960Wh theoretical) against your actual draw before sizing.
- 3U Rackmount Form Factor: Occupies 3 rack units in a standard 19-inch enclosure. At 117 mm tall and 610 mm deep, plan for adequate rear clearance in shallow or mid-depth cabinets — 610 mm depth is on the longer side and will not fit in 500 mm or shallower racks without cable management compromises.
- Metal Chassis Construction: The silver metal housing provides structural rigidity appropriate for permanent rack installation. Unlike plastic-housed external battery packs, the all-metal build holds its form under the weight of lead-acid cells over multi-year deployment cycles.
- 0–40°C Operating Range: Rated for standard indoor data center and equipment room temperatures. If your rack environment runs hot (above 40°C sustained), lead-acid chemistry will degrade faster — VRLA batteries lose capacity and lifespan meaningfully above this threshold, so ventilation in the rack is not optional.
- Storage Temperature Down to -15°C: Modules can be stored in unheated facilities or warehouses without damage, which matters for staged deployments or spare-part inventory strategies at multi-site installations.
- 0–95% Relative Humidity (Non-Condensing): The operating and storage humidity range covers most controlled indoor environments. Condensation is the risk to manage — the module should never see temperature swings that push ambient moisture below the dew point.
- Altitude Rated to 3,048 m (10,000 ft): Covers the majority of North American installation sites, including high-altitude facilities in the Mountain West and elevated data centers. No derating needed below this ceiling.
Integration & Compatibility
The BM120V30ATY is designed to pair with compatible CyberPower UPS systems that accept external 120VDC battery modules. Compatibility is chassis-specific — verify the host UPS model explicitly supports this module before deploying. Mismatched battery voltage or connector pinout will prevent the module from functioning and may damage the host unit. For network and security equipment racks where a UPS already handles primary conditioning, this module extends the runtime window rather than adding a second UPS layer, which is typically the more cost-effective approach for surveillance and access control head-end rooms. Consult CyberPower's compatibility matrix or pre-sales engineering resources to confirm supported host models before placing an order. If you're planning a full power backup strategy for a multi-camera or multi-site security deployment, pair this module evaluation with a load calculation — runtime scales with the gap between 960Wh theoretical capacity and your actual connected watt draw.
Frequently Asked Questions
Q: What UPS systems is the BM120V30ATY compatible with?
A: The BM120V30ATY is designed for use with compatible CyberPower UPS units that accept external 120VDC battery modules. Compatibility is model-specific — verify your host UPS explicitly supports this module before ordering. CyberPower's product documentation or pre-sales support can confirm supported pairings.
Q: What battery technology does the BM120V30ATY use?
A: It uses sealed lead-acid (VRLA) batteries at 8Ah / 120VDC. VRLA chemistry is maintenance-free — no electrolyte servicing required — and safe for enclosed rack installations without dedicated venting.
Q: What rack space does the BM120V30ATY require?
A: The module occupies 3U (117 mm height) in a standard 19-inch rack. The chassis depth is 610 mm, so confirm your rack cabinet provides at least that much usable rear depth before installation.
Q: What is the operating temperature range for the BM120V30ATY?
A: The rated operating range is 0°C to 40°C (32°F to 104°F). Sustained temperatures above 40°C will reduce VRLA battery capacity and service life — adequate rack ventilation is required.
Q: Can the BM120V30ATY be stored before installation?
A: Yes. The storage temperature range is -15°C to 40°C, and storage humidity tolerance is 0–95% (non-condensing). Modules can be held in unheated warehouses or staging areas within those bounds without damage.
Q: How much theoretical energy capacity does the BM120V30ATY provide?
A: At 120VDC and 8Ah, the theoretical energy capacity is 960Wh. Actual usable runtime depends on the connected load — calculate your UPS system's watt draw against this figure to estimate backup duration before deployment.
The BM120V30ATY is a rack-mounted 120VDC VRLA battery module — 8Ah sealed lead-acid in a 3U silver metal chassis. I typically recommend it when an existing compatible CyberPower UPS needs runtime extension rather than full replacement, which is a realistic scenario in surveillance head-ends where the base UPS was sized for normal operations but a site audit revealed insufficient holdover time for graceful NVR shutdown during extended outages.
Technical Highlights:
- 120VDC / 8Ah Capacity: 960Wh theoretical — meaningful runtime extension when the connected load is modest (a handful of NVRs and managed switches), but insufficient on its own for high-density compute loads. Do the load math before committing.
- 3U × 610 mm Deep Chassis: The depth is the spec that catches integrators off-guard. At 610 mm, this module will not fit in 500 mm-depth two-post or wall-mount cabinets. Measure before racking.
- 0–40°C Operating Limit: VRLA chemistry is temperature-sensitive. Above 40°C sustained, expect accelerated capacity fade and shortened service life — this is a hard ceiling, not a soft guideline.
Deployment Considerations:
- Confirm host UPS model compatibility explicitly before ordering — the 120VDC nominal voltage and connector interface must match the CyberPower chassis accepting this module; wrong pairing will prevent operation.
- Storage humidity tolerance is rated to 95% non-condensing, but condensation from rapid temperature transitions is a real-world risk in loading docks and unheated server closets — acclimatize the module before powering up after cold storage.
The BM120V30ATY fits best in mid-size security operations centers and surveillance equipment rooms running a compatible CyberPower rackmount UPS where the runtime gap between a power event and graceful system shutdown needs to be extended by 15–45 minutes depending on load — and where a full UPS replacement would disrupt an already-commissioned power architecture.
