Huawei 03031MPJ / STL2BATTA01 Battery Backup Unit (BBU) – Product Data Sheet

1. Product Overview

The Huawei 03031MPJ (also designated as STL2BATTA01) is a Battery Backup Unit (BBU) designed for Huawei OceanStor V3 series enterprise storage systems. This module provides temporary backup power to the RAID controller cache memory during power interruptions, enabling the safe transfer of cached data to non-volatile storage and preventing data loss in mission-critical storage environments.

The BBU is a service-replaceable component that integrates with the storage controller enclosure. When primary power fails, the unit supplies sufficient energy to complete pending write operations and maintain cache integrity until the system performs an orderly shutdown. It is commonly deployed in SAN and NAS environments where data integrity and uptime are essential.

2. Specifications

Alternative / Cross-Reference Part Numbers

• STL2BATTA01

• STL2BATTA01-02

• STLZA1PWR-02

• 03031MPJ-02

• 031MPJ-02

3. Compatible Device Models

The Huawei 03031MPJ / STL2BATTA01 BBU is compatible with the following Huawei OceanStor storage system models:

Note: Compatibility may vary based on specific controller configuration, firmware level, and system revision. Always verify part number compatibility with the storage system’s documentation or a qualified service representative before replacement.

4. Product Family / Related Modules

The 03031MPJ shares a compatibility ecosystem with the following related BBU modules commonly used across OceanStor V3 platforms:

5. Functional Description

During normal operation, the BBU remains in a charged state. Upon detection of external power loss, the unit discharges to supply power to the controller’s cache memory. This enables the controller to flush dirty cache data to persistent storage or maintain cache contents until power is restored. The BBU is managed by the storage system’s monitoring subsystem, which reports battery health, charge status, and remaining capacity through the management interface.