BYD Battery-Box Premium LVL Instruction Manual
BYD Battery-Box Premium LVL
Service Guideline and Checklist
Version 1.1
Valid forPremium LVL 15.4
LVL 15.4 (max. 64 per system) BMU (1 x per system)
Make sure to always use the latest version of this service document,
available at: www.bydbatterybox.com
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.
CONTENT 2
1. GENERAL STEPS 3
2. ERROR ANALYSIS 4
2.1 BMU shows no reaction / No LED 4
2.2 Communication problem with Inverter 5
2.3 Problem with the Firmware Update / App Configuration 6
2.4 BMU/BMS LED event code (EC) 7
2.5 Be Connect Plus (BCP) 9
2.6 Voltage measurement and undervoltage 10
3. SERVICE TASKS 12
3.1 BMU Replacement 12
3.2 BMS Replacement 12
3.3 BIC Replacement 12
SERVICE CHECKLIST AND CONTACT INFORMATION 13
2
CONTENT
Make sure to always use the latest version of this service document, available at: www.bydbatterybox.com
Please proceed first with the installation steps by:
3
1. GENERAL STEPS
No.
Name
Description
1
Configuration
Check if the configuration is correct. Refer to latest “BYD Battery-Box Premium LVL
Minimum Configuration List” (V1.3 or above) available at: www.bydbatterybox.com
Make sure the inverter is configured correctly.
2
Correct internal
cabling
Please double check, referring to the manual
3
Correct external
cabling
1. Communication to inverter
a. Depending on the choice of inverter the cable between the BMU
port and the inverter must be specially made. Please check the
specifications in the installation manual.
b. Recommended CAT5 or higher;
c. Check the cables and replace them if necessary
2. Grounding
a. Battery-Box connected directly to the ground-bus of the house.
b. The battery must not be earthed via the inverter! Otherwise,
communication problems are possible.
3. Ethernet-Cable for Internet (strongly recommended!)
4. DC-Ports - Make sure that + and - are properly connected.
5. Correct parallel connection cabling if applicable
4
Latest Firmware
Always update the newest Firmware! (with using the latest App Version)
Note: If not stated otherwise, wifi password is BYDB-Box
5
App Configuration
To complete the commissioning, the configuration of the battery via “BYD Be
Connect” App is mandatory!
6
Restart
After app configuration, please perform a proper restart of the system by switching off
the battery correctly (press LED Button on BMU for 5 sec). Make sure all LEDs of the
battery are completely off. Then follow the correct switch on procedure (see step 7)
7
Switch on procedure
Correct switch on procedure is important for a correct operation!
1. Switch on the fuse between Inverter and Battery (if there is any)
2. Switch on the Battery-Box (button on LVL)
3. Activate the inverter after the battery
8
Checking the correct
operation
The system runs properly if:
- Inverter displays battery SOC correctly
- System charges / discharges
Note: If you can not complete the commissioning, then turn off the battery before
you leave the site and make sure all LEDs are off to avoid a discharge of the battery.
2.1 BMU shows no reaction / No LED
LEDs of BMU do not light up, although the battery is ON.
4
2. ERROR ANALYSIS
Please refer to the general steps before proceeding, see chapter 1.
No.
Name
Description
9
Check correct cable port
Make sure that the correct data cable port has been used at the BMU (“BMS” port.
Do not mix with “inverter” or “Ethernet” port).
10
Unplug Comm Cable
Sometimes might be necessary to unplug the communication cable and plug it
back again when the batteries are switched on.
11
Replace Comm Cable
Try a completely new communication cable between battery and BMU.
12
Voltage measurement on
pin 7&8
Measure the voltage of PIN 7 & 8 while the other side of the cable is connected to
the IN port of the Battery-Box and while the Battery-Box is powered on. Voltage
should be around 50V. If yes: try another BMU (if available). If no: check another
cable or try another LVL if multiple batteries are installed in the system..
13
Only LED faulty?
In some rare cases, the LED of the BMU is faulty. To check that: check if there is a
wifi access point of the Battery-Box and check if there are internal LEDs inside the
BMU. If so, only the external LED is inactive and a commissioning could still work.
14
Voltage measurement
Check voltage of battery. See Section 2.6
15
BMU exchange
Only if voltage between pin 7&8 are okay, correct comm port is used, voltage
seems correct and the cable between the Battery and the BMU was exchanged:
Test another BMU, if available.
2.2 Communication problem with Inverter
5
No.
Name
Description
16
Configuration
Check if the configuration is correct. Refer to latest “BYD Battery-Box Premium
LVL Minimum Configuration List” (V1.3 or above) available at:
www.bydbatterybox.com
Make sure the inverter is configured and working correctly.
17
Communication cable
- Confirm PIN / Cable Configuration for the specific inverter model
- Replace the communication cable (min. CAT5!)
18
Check terminal resistor
Make sure that the terminal resistor is connected to the OUT port of the last
battery (the battery with the highest address).
19
App Configuration and
Firmware
Please check if the App configuration was successful and the Firmware is the
most recent one. If there are problems, please refer to Section 2.3
20
Restart the entire system
1. Switch off the Inverter
2. Switch off the battery (Press button on BMU for 5 seconds until all batteries
switch off. All LEDs should be off)
3. Wait for 2 Minutes
4. Turn on the Battery (button on battery connected to BMU) and then
5. Turn on inverter second
21
Further checking
If problem remains:
- Download all data with BCP (section 2.5)
- Check the inverter
- Try by replacing the BMU, if available
2.3 Problem with the Firmware Update / App Configuration
The Battery Management consists of two components: the BMU and the BMS. The Firmware Update from the App will update
the BMU, which will then update the BMS. The BMS update can take up to 30 Minutes until the firmware is updated on the
BMS.
6
No.
Name
Description
22
Correct App and Firmware
Make sure to have the latest App Version (>1.5.2) and Battery Firmware (download
inside the App) on your mobile device before connecting the app with the battery
WiFi.
If the App cannot be installed, or other general Problems occur with the App:
- Try with a different mobile device (For Android: min Android version
requirement is 4.4. )
- Try with PC Tool BCP (section 2.5)
23
App reports: “Data
connection busy” / “Data
connection failure.”
Battery-Box is busy (e.g the battery could be updating the firmware). Please wait 10
minutes and try again.
24
Close and restart the App
If the App does not react anymore after some minutes loading during the update
process, close (close the program completely) and restart the App. Or try with PC
Tool BCP (section 2.5)
25
BMS Version not updated
The App will only update the BMU. The BMU will update the BMS, which can take up
to 30 minutes.
If the BMS Version is not updated after 30min with stable inverter communication,
follow the below Process:
1. Update Firmware through the App again
2. Restart the system
a. Switch off the Inverter first, then switch off the battery second
(Press LED button on BMU for 5 seconds)
b. Wait for 2 Minutes
c. Turn on the Battery first, then turn on the inverter second
3. Wait for 30 Minutes
4. Check BMS Firmware Version again with App. If Version is still wrong, do
the update process again (if possible with another mobile device).
2.4 BMU/BMS LED event code (EC)
A constant white LED refers to standby mode. White blinking means charge or discharge.
When the battery is initiating, the LED will flash white and blue with an interval time of 0.5 seconds (normal during startup).
When the LED flashes blue with an interval time of 1 second it indicates an event code. We start to count when the white LED
begins to flash, then we count how many times white and blue LED flashes. (also refer to the manual!)
Example: 1xwhite, 6xblue → EC 106 / 1xwhite, 11xblue → EC 111 / 3xwhite, 3xblue → EC 303
Most Errors come from a faulty communication line, incorrect app configuration or missing restart after app-configuration.
Please go in detail through: Section 1, 2.2 & 2.3
Note: if the system is not correctly configured with the app, the event code (EC) might be misleading.
Note: every LVL has its own BMS. The Event Code of the BMS will therefore be shown in the LED of the individual LVL.
7
EC
BMU
EC
BMS
Measure
EC 101
all
- Update the Parameter Table to the latest version using BCP (section 2.5)
- Download all data with BCP (especially the historical data) (section 2.5)
If problem remains: replace BMU, if available
EC 102
EC 105
all
- Make sure app-configuration has been completed correctly (especially module quantity!).
- Check terminal resistor
- Replace communication cable between Battery and BMU
- Restart system according to manual. (note: to properly shut down you need to press the
button on BMU for 5 seconds. Make sure to start the battery before starting the inverter!)
- Download all data with BCP (especially the historical data) (section 2.5)
- If multiple LVL batteries are in the system, check if the system works when removing the
suspected LVL, or try the batteries one by one with the BMU to identify if the system works
If problem remains: replace BMU, if available
EC 103
EC 108
- Check DC cabling and make sure that the Minimum Configuration is met.
- Check the voltage of the batteries with BCP according to section 2.5 / 2.6
- Restart system properly (see Step 20, section 2.2; especially make sure that fuse
between battery and inverter is closed, if there is a fuse)
- Download all data with BCP (especially the historical and cell data) (section 2.5)
- Check if the system works when removing the LVL with the EC108 (see section 2.8)
- provide the SN and voltage of the LVL with the EC (see checklist on last page)
EC 104
EC 101
- Check DC cabling (is there any short circuit? Fuse between battery and inverter closed?)
- Disconnect the battery system from the inverter and restart the battery system alone
(battery isolated), to evaluate if the error is being caused externally (i.e. short circuit in
inverter or mppt). If the Event Code remains, the error might be in the battery. If the Event
Code has changed, there might be an error in the inverter side.
- Download all data with BCP (especially the historical and cell data) (section 2.5)
- Check if the system works when removing the LVL with the EC 101 (see section 2.8)
- provide the SN and voltage of all LVLs with the EC (see checklist on last page)
8
EC 104
EC 103
- Check if there is any sign of short circuit in the BICs (e.g. component damage - what is
the BIC part is shown in section 3.3)
- Check the sampling cables connection: B2+ up left / B1+ bottom left / B2- up right / B1-
bottom right
- Check whether the LED lights on the two BIC (electric components directly on the two
battery modules inside LVL - see section 3.3) are on.
If yes, try to exchange the upper BIC with the lower one.
If not, BIC replacement might be needed.
- Download all data with BCP (especially the cell data) (section 2.5)
- Measure the cell voltage according to section 2.6
- Check if the system works when removing the LVL with the EC (see section 2.8)
- provide the SN and voltage of the LVL with the EC (see checklist on last page)
EC 104
EC 107
EC 113
Undervoltage
- Shut down the system quickly to avoid further discharge. Check whether the system can
shut down normally (by pressing the LED button in BMU for 5s).
- Follow section 2.6 (Voltage measurement of cells)
EC 104
EC 102
up to
EC112
(All other than
101, 103, 107,
113)
- Download all data with BCP (especially the historical and cell data) (section 2.5)
- Check the voltage of the batteries according to section 2.6
- Check if the system works when removing the module with the EC (see section 2.8)
- provide the SN and voltage of the module with the EC (see checklist on last page)
EC 106
all
- Make sure the inverter is on, configured and working correctly.
- Check according to section 2.2
9
2.5 Be Connect Plus (BCP)
Be Connect Plus is a PC tool. With Be Connect Plus (BCP) you can:
- read the battery information,
- configure the battery system
- update BMU & BMS firmware
- update Parameter Table
- Export / download battery logs
BCP is constantly being improved and updated. Make sure to use the latest program version. You can download the latest
version of the Tool on www.bydbatterybox.com / www.eft-systems.de / www.alpspower.com.au.
For the service analysis, please download and provide the data / logs as described in the program instructions (see PDF
manual inside of program ZIP archive).
Note: You need a windows computer that will be connected to the battery Wifi.
10
2.6 Voltage measurement and undervoltage
Attention: Make sure not to create a short circuit!
- You can see the max. and min. cell voltage in the BeConnect App.
- You can get the detailed module and cell voltage in the BCP Program (section 2.5)
- or measure it manually according to the below description:
Measure the module voltage: Open the front door and measure the tower voltage between B+/B- (red circle).
Measure also between P+/P- (green circle) on the BMS as shown below.
Measure the cell voltages in case of BMS EC 107, EC 103, or if BCP shows cells with <1.5 V / does not show cell
voltages. This will help us to understand if the issue is in the cell or in the BICs.
The voltage has to be measured in pairs as shown below. If the voltage is 0, in most cases this value is not
correct and the measuring device is not in correct contact with the PINs. (please establish a correct and good
contact)
Please record these measurements of 16 cells in total. (Cell Number 1-8 for button module, 9-16 for upper
module)
11
Undervoltage
A LVL in which one of the 16 cells has a voltage of <1.5 V is in undervoltage (check with BCP (section 2.5) / BC if
possible).
- LVL with >45 V should be fine and you can continue to check other points according to this service guideline.
- If the LVL voltage is <45V but the single cell voltage is >1.5V, the battery needs to be charged quickly while
avoiding any further discharge. Therefore shutdown the system and search the problem according to the
guideline, while the battery is completely off. Also check on the inverter side why the force charge doesn’t work.
Do not turn on the battery before making sure the inverter should be able to charge the battery.
- If only one LVL is in undervoltage: remove that one and try commissioning without it. Otherwise, make sure to
avoid further overdischarge. (Turn off the system completely)
- If one, or all LVL are in undervoltage: Contact the service as stated below and make sure to avoid any further
discharge of the battery (Turn off the system completely)
When contacting the service, make sure to fill the service checklist completely and add the following
information:
- Serial Numbers (of the BMU and all (affected) LVL)
- Individual LVL voltages of all LVL (related to Serialnumber)
- Logs from the battery using BCP (section 2.5) and Screenshots showing the cell voltages, or manual
cell voltage measurements
- Initial Firmware (FW) Version of the Battery when the UV happened (BMU and BMS)
- Detailed description how and why the system reached Undervoltage if known. Information when the
system was installed and commissioned and in which circumstance and when the undervoltage
happened. If the battery was never running before: Why did it never work before, and what was the
Batteries status when the battery was left (on / off / LED).
- Inverter Model, Serial Number and Inverter Logs
- Access to Inverter portal (add [email protected] and tell us the name of the system in the portal)
3.1 BMU Replacement
Have you detected a faulty BMU?:
After replacing the BMU, please do not forget to re-do the configuration and firmware-update in the app.
3.2 BMS Replacement
Refer to Manual “BMS Drawer Replacement Guide”
3.3 BIC Replacement
Refer to Manual “BIC Board Replacement Guide”
12
3. SERVICE TASKS
Please go through the general and error specific steps beforehand, see chapter 1 and 2.
1.
3.
2.
Important: The installation and all other kinds of works or measurements in combination with the BYD Battery-Box are only
allowed by professional and qualied electricians. Improper handling can cause danger and damage. This document does
not replace the ocial BYD manuals and documents. No responsibility is accepted for the accuracy of the information.
BYD Battery-Box Premium LVL Service Checklist - V1.1 EN
Please ll all available information in below table. Some information like the Serial Number of the BMU is mandatory to receive service.
SERVICE INFORMATION
2.1 BMU shows no reaction / No LED
2.2 Communication problem with Inverter
2.3 Problem with the Firmware Update / App Conguration
ERROR RELATED ANALYSIS
Please mark the error related Analysis from Chapter 2 (page 4-11) of the Service Guideline that you checked, and collect
all the information related to those Sections
2.4 BMU/BMS LED event code (EC)
2.5 Be Connect Plus (BCP)
2.6 Voltage measurement
Company
Contact Person
Street / Nr.
ZIP / City
Phone
Email
• Service Ticket Number or System ID:
• Installer / Delivery Address / Contact:
• System Information
Battery Conguration (X x LVL)
BMU Serial Number
BMU Connected to Internet
Inverter Brand + Model
Inverter Serial Number
Commissioning Date
BMU Firmware
BMS Firmware
Inverter Firmware
Inverter Portal Name
(State the system name. Provide access)
• Service Information
Yes No
BMU EventCode (EC) Inverter Error Code
Was the battery charging / discharging before (was the system working normally before?)
Take pictures of open communication port in the Battery and Inverter clearly showing connection cables
Get Data of the Battery-Box with the Be Connect Plus (BCP) Programm (see chapter 2.5)
Yes No
Description of
the Problem
Please provide any additional information that is necessary or could help in the analysis of the service case (e.g. serial number of a
wrong module, video of a special behaviour; pictures; app screenshots; module voltages... )
BMS EventCode(s) and related LVL Serial Number(s)
1.1 Conguration
1.2 Correct internal cabling
1.3 Correct external cabling
1.4 Latest Firmware
1.5 App Conguration
1.6 Restart
1.7 Switch on procedure
1.8 Correct Operation
GENERAL STEPS
Please carefully check all 8 „General Steps“ from page 3 of the Service Guideline and conrm this in the boxes below
By contacting us you conrm, that a qualied person has done the necessary control and collected all available information above.
Service Contact: Europe: EFT-Systems GmbH Australia: Alps Power Pty Ltd
www.eft-systems.de www.alpspower.com.au
+49 9352 8523999 +61 02 8005 6688
For Europe only: Register Ticket directly in the Online Service Center: https://support.eft-systems.de/
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1
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