APC SMX120RMBP2U Smart-UPS X 120 V External Battery Pack 2U

Overview

The APC SMX120RMBP2U is an external battery pack designed to extend the runtime of compatible APC Smart-UPS X-Series UPS systems in rack and tower-mount installations. It is deployed by data center and IT infrastructure engineers to provide additional DC energy storage, enabling longer hold-up time for servers, storage, network devices, and other critical equipment during extended utility power interruptions.

This pack uses sealed lead-acid (VRLA) batteries arranged in a 120 V DC battery string with approximately 1200 VAh of capacity. Batteries are hot-swappable and user-replaceable, which minimizes maintenance downtime when servicing batteries and helps preserve continuous UPS operation.

Mechanically, the SMX120RMBP2U occupies 2U of rack space and ships with rack mounting brackets for installation beneath a UPS or in a dedicated battery bay. Its rack/tower convertible design also supports standalone placement beside a UPS, providing deployment flexibility in rack cabinets or smaller equipment rooms.

This external battery pack does not produce AC output itself; it must be connected to a compatible Smart-UPS unit to convert DC battery energy into AC backup power. It is not a UPS standalone unit and should not be deployed without a supporting UPS.

Key Features

• 2U rack/tower convertible external battery pack
• 120 V DC sealed lead-acid battery string
• Hot-swappable, user-replaceable battery modules
• Rack mounting brackets included
• Scalable runtime with additional battery packs

Specifications