BYD Battery-Box Premium LVL User Manual

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BYD Battery-Box Premium LVL
Service Guideline and Checklist
Version 1.1
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Valid forPremium LVL 15.4
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LVL 15.4 (max. 64 per system) BMU (1 x per system)
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Make sure to always use the latest version of this service document,
available at: www.bydbatterybox.com
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Important: The installation and all other kinds of works or measurements in combination with the Battery-Box
Premium are only allowed by professional and qualified electricians.
This checklist is a shortened assistance for the Battery-Box and does not replace the original manual, which can                 
be found on www.bydbatterybox.com / www.eft-systems.de / www.alpspower.com.au. Subject to technical          
modifications; no responsibility is accepted for the accuracy of this information. Attention: Improper handling             
can cause danger and damage.

BYD Battery-Box Premium LVL Specifications

General

Battery Type	Lithium Iron Phosphate (LFP)
Nominal Voltage	51.2 V
Max Charge Current	100 A
Operating Temperature	-10°C to +50°C
Warranty	10 years
IP Rating	IP55
Operating Voltage	44.8 V - 57.6 V
Scalability	Up to 64 modules in parallel
Communication	CAN
Cycle Life	6000 cycles
Efficiency	>95%

Summary

GENERAL STEPS

1.1 Configuration

Check system configuration and inverter settings for correct operation.

1.2 Correct internal cabling

Ensure internal wiring connections are correctly made as per manual.

1.3 Correct external cabling

Verify external communication and power cables are properly connected.

1.4 Latest Firmware

Importance of updating the battery system to the newest firmware version.

1.5 App Configuration

Mandatory configuration of the battery system using the "BYD Be Connect" App.

1.6 Restart

Procedure for safely restarting the battery system after configuration.

1.7 Switch on procedure

Correct sequence for switching on the battery and inverter for operation.

1.8 Correct Operation

How to verify the system is operating correctly by checking SOC and charge/discharge.

ERROR ANALYSIS

2.1 BMU shows no reaction / No LED

Troubleshooting steps for when the BMU's LEDs do not light up.

2.2 Communication problem with Inverter

Steps to diagnose and resolve communication issues between battery and inverter.

2.3 Problem with the Firmware Update / App Configuration

Solutions for errors encountered during firmware updates or app configuration.

2.4 BMU/BMS LED event code (EC)

Interpreting BMU/BMS LED event codes to diagnose system errors.

2.5 Be Connect Plus (BCP)

Using the PC tool Be Connect Plus for system analysis and data logging.

2.6 Voltage measurement and undervoltage

Procedures for measuring module/cell voltages and diagnosing undervoltage issues.

SERVICE TASKS

3.1 BMU Replacement

Instructions for replacing a faulty BMU unit.

3.2 BMS Replacement

Guidance on replacing the BMS drawer.

3.3 BIC Replacement

Instructions for replacing the BIC board.

SERVICE CHECKLIST AND CONTACT INFORMATION