APC by Schneider Electric SRT72RMBPUS Smart-UPS SRT 72V 2U Rack Battery Pack
Overview
The SRT72RMBPUS is a 72V, 2.2KVA-rated external rack battery pack designed for the APC Smart-UPS SRT series. Occupying 2U of rack space in a standard 17-inch form factor, it extends runtime for critical loads — security infrastructure, network gear, and access control systems — without adding a separate UPS unit to the stack. If your SRT-series UPS is already sized correctly for your load but you need more minutes at the rack, this is the direct path: bolt in a second battery module, no controller reconfiguration required on compatible systems.
The black, rack-mount chassis pairs with the APC by Schneider Electric UPS lineup, and the lead-acid battery chemistry means predictable discharge curves and established replacement cycles — relevant when you're managing a fleet of rack UPS systems across multiple sites. Lead-acid also avoids the thermal runaway risks associated with lithium alternatives in enclosed rack environments, which matters in high-density closets with limited airflow.
The SRT72RMBPUS carries an EAR99 classification, meaning it moves through standard US export channels without a license for most destinations — a practical consideration for multi-site or international deployments.
For sizing guidance on runtime extension and compatible UPS host units, consult the UPS battery selection guide before committing to a quantity. Runtime is load-dependent; a 2.2KVA rating on the battery pack does not translate directly to 2.2KVA of extended runtime without factoring in your actual connected load and the host UPS efficiency curve. Pair with compatible rack PDUs or network management cards for remote runtime monitoring where your SRT host supports it.
Frequently Asked Questions
Q: Which APC UPS models is the SRT72RMBPUS compatible with?
A: The SRT72RMBPUS is designed for the APC Smart-UPS SRT series. Verify compatibility against your specific SRT host model number before ordering — not all SRT variants support external battery packs of this voltage configuration.
Q: What battery chemistry does the SRT72RMBPUS use?
A: It uses a sealed lead-acid battery, which provides predictable discharge behavior and a well-established replacement schedule. Lead-acid is suitable for enclosed rack environments where thermal management is a concern.
Q: How much rack space does the SRT72RMBPUS require?
A: It occupies 2U in a standard 19-inch rack (the unit itself is 17 inches wide, fitting standard rack rails).
Q: Is the SRT72RMBPUS subject to export controls?
A: It carries an ECCN of EAR99, the lowest-control classification under US Export Administration Regulations. No export license is required for most destinations under standard commercial conditions.
Q: Can the SRT72RMBPUS be used as a standalone UPS?
A: No. It is a battery extension pack only and requires a compatible APC Smart-UPS SRT host unit to function. It does not contain inverter or transfer circuitry of its own.
The SRT72RMBPUS is a purpose-built 72V lead-acid rack battery pack for APC Smart-UPS SRT hosts — the right answer when you've already sized your UPS for load capacity but need additional runtime headroom at a specific rack position without redeploying the entire UPS stack.
Technical Highlights:
- 2U Rack Form Factor: At 17 inches and 2U, this pack slots into a standard rack column without consuming disproportionate real estate — important in dense comms closets where every unit of space has a cost.
- Lead-Acid Chemistry: Sealed lead-acid delivers a known, linear discharge curve. In practice, that means your runtime calculations from APC's runtime tables are reliable — less guesswork than newer chemistries in edge-case load profiles.
- EAR99 Classification: No export license required for standard commercial shipments to most destinations. For multi-site deployments spanning international locations, this simplifies procurement logistics considerably.
Deployment Considerations:
- This pack extends runtime only — it does not add load capacity to the host UPS. Confirm your SRT host's maximum supported battery pack count before ordering multiples for extended runtime targets.
- Lead-acid batteries have defined service life (typically 3–5 years depending on environment and cycle depth). Plan battery replacement intervals into your maintenance schedule; degraded cells won't fail gracefully under a real outage event.
The SRT72RMBPUS fits best in security operations centers and network closets running APC Smart-UPS SRT hosts where a single outage window justifies the cost of documented runtime extension — particularly where the host UPS is already at full load capacity and adding another UPS is not an option.
