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Huawei / UPS Power & Backup Systems

ESM-4801A1 Equipment information & support

The Huawei ESM-4801A1 is a 48V smart energy storage lithium battery management module designed for telecom base stations and data centers, integrating high-reliability LiFePO4 cells, advanced BMS, and bidirectional DC/DC power conversion.

Equipment information

Brand
Huawei
Equipment model
ESM-4801A1
Equipment type
UPS Power & Backup Systems
Controller / software version
Confirm against the installed equipment
View full product specifications
Huawei ESM-4801A1 Telecom Energy Storage Smart Lithium Battery (48V LiFePO4 Smart BMS Control) - Official Front View

Information below comes from the current product catalogue. Confirm the controller, software version and configuration of the installed equipment separately.

Rated Voltage
48VDC
Cell Chemistry
Lithium Iron Phosphate (LiFePO4)
Communication Interface
RS485 / CAN
Operating Temperature Range
-20 ~ +55°C
Conversion Technology
BMS & Bidirectional DC/DC
Monthly Self-Discharge Rate
< 2% per month (at 20°C standard)

Alarms & troubleshooting

BATT_UNDERVOLT / LOW_SOC (Battery String Undervoltage / Low State of Charge)
BMS red ALARM LED lit; controller battery icon flashes; BLVD disconnect impending.
Extended utility blackout without generator backup, individual cell failure, or incorrect cutoff calibration.
1. Restore AC power immediately or connect mobile generator; 2. Monitor equalize charge curve (current must not exceed 0.15C); 3. Measure individual cell voltages and internal resistance to isolate weak cells; 4. After full charge, calibrate SOC and capacity via BMS.

Access Complete Maintenance & Full Alarm Troubleshooting Manual

This page lists high-frequency critical alarm codes commonly encountered in field maintenance. Comprehensive manufacturer troubleshooting matrices, board-level repair guides, detailed electrical schematics, and firmware commissioning manuals are delivered alongside equipment upon formal project procurement, accompanied by dedicated FAE technical support.

Contact Account Manager for Full Manual

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