BYD LVS 4.0 B-Box Premium Battery Storage User Guide
- June 6, 2024
- BYD
Table of Contents
BYD Battery-Box Premium LVS
Service Guideline and Checklist
Version 1.0
Valid for Premium LVS 4.0 / 8.0 / 12.0 / 16.0 / 20.0 / 24.0
LVS 16.0 (4 Modules + PDU – max. 64 Modules in 16 Towers per System)
BMU (1 x per System)
https://www.bydbatterybox.com/
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.
GENERAL STEPS
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:
No.
| Name|
Description
---|---|---
1| Configuration| Check if the configuration is correct. Refer to the latest
“BYD Battery-Box Premium LVS Minimum Configuration List” (V1.1 or above)
available at: www.bydbatterybox.com
Make sure the inverter is configured correctly.
2| Correct external cabling| 1. Communication to the 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 necessary2. 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 the Internet ( strongly recommended! )
4. DC-Ports – Make sure that + and – are properly connected. (Male DC
Connector piece required)
5. Correct parallel connection cabling if applicable
3| Latest Firmware| Always install/update the newest Firmware!
Note: If not stated otherwise, wifi password is BYDB-Box
4| App Configuration| To complete the commissioning, the configuration of the
battery via the “Be Connect” App is mandatory!
5| 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 the procedure (see step 6)
6
| 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 (LED Button on the top LVS module ) 3.
Activate the inverter
7| 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
ERROR ANALYSIS
Please refer to the general steps before proceeding, see chapter 1.
2.1 BMU shows no reaction / No LED
LEDs of BMU do not light up, although the battery is ON.
| No. | Name | Description |
|---|---|---|
| 8 | 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).
9| Unplug Comm Cable| Sometimes might be necessary to unplug the communication
cable and plug it back in again when the batteries are switched on.
10| Replace Comm Cable| Try a completely new communication cable between the
battery and BMU.
11| 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 LVS if
multiple batteries are installed in the system.. 
12| 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 commissioning could still work.
13| Voltage measurement| Check the voltage of the battery. See Section 2.6
14| BMU exchange| Only if the voltage between pin 7&8 are okay, the 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
No.
| Name|
Description
---|---|---
15| Configuration| Check if the configuration is correct. Refer to the latest
“BYD Battery-Box PremiumLVS Minimum Configuration List” (V1.1 or above)
available at: www.bydbatterybox.com
Make sure the inverter is configured and working correctly.
16| Communication cable| – Confirm PIN / Cable Configuration for the specific
inverter model (see manual)
– Replace the communication cable (min. CAT5!)
17| Check terminal resistor| Make sure that the termination resistor is
connected to the OUT port of the last battery (the battery with the highest
address). Terminal resistor properties: 120 Ω resistor between pin 5 and 6
18| 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
19| 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)
3. Wait for 2 Minutes
4. Turn on the Battery (button on any battery) and then
5. Turn on inverter second
20| Further checking| If the 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
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
No.
| Name|
Description
---|---|---
21| Correct App and Firmware| Make sure to have the latest App Version
(>1.5.1) 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 )
22| 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.
23| Close and restart the App| If the App does not react anymore after some
minutes of loading during the update process, close (close the program
completely) and restart the App. Or try with PC Tool BCP ( section 2.5 )
24| 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 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 the 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 to charge or
discharge.
When the battery is initiated, 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 the 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 2.2 & 2.3
Note: if the system is not correctly configured with the app, the event
code (EC) might be misleading.
EC
BMU| EC
BMS| Measure
---|---|---
EC 101| all| – Download all data with BCP (especially the historical data)
(section 2.5)
If the 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!)
– If the problem remains, check the connection ports of the LVS Module with
the LED white and blue blinking and the module above this one. If all modules
show this blinking, check the top module first(see section 2.7)
– Download all data with BCP (especially the historical data) (section 2.5)
– Check if the system works when removing the suspected module (see section
2.8)
If the 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 19, 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 module with the EC (see
section 2.8)
– provide the SN and voltage of the faulty module (see checklist on the 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 on 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 module with the EC (see section
2.8)
– provide the SN and voltage of all modules with the EC (see checklist on the
last page)
EC 104| EC 102 up to
EC113
(All other
than 101)| – 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 the
last page)
EC 106| all| – Make sure the inverter is on, configured, and working
correctly.
– Check according to section 2.2
2.5 Be Connect Plus (BCP)
Be Connect Plus is a Windows-PC tool. With Be Connect Plus (BCP) you can:
– read the battery information,
– configure the battery system
– update BMU & BMS firmware
– Export/download battery logs (From BMU and all BMS) 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.
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 also get the detailed module and cell voltage in the BCP Program
(section 2.5)
– or measure it manually according to the below description:
To check the voltage on the PDU, the Modules have to be ON and the BMU has to
be connected with the PDU!
(LEDs on Modules and BMU have to be ON)
Please measure at P+ and P- according to the below picture:
The voltage measured on the PDU is the combination / average voltage of all
modules in the tower. This should be around 50 V. If it is not around this
value, please measure the voltage of each individual LVS Module by one of the
following two possibilities (please note, that you cannot measure the correct
voltage in any other way).
1. Only put one Module in the tower and measure the voltage according to the
above process on the PDU. (Make sure the LVS Module is ON and BMU connected
when you measure the voltage on the PDU).
2. If the modules cannot be activated, or you cannot get a correct voltage
value, the other option to measure the voltage in one LVS module is by
opening the module according to the below process:
To check the voltage, you need to disassemble the right side of the battery
module (the side with the LED). Then follow the procedure described on the
next page.
Attention: Make sure not to create a short circuit!
The voltage should be about 50 V.
Measure the voltage at the below marked “BAT+” and “BAT-”.
Measurement showed here:
Undervoltage
A Module 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).
– LVS Modules with >45 V should be fine and you can continue to check other
points according to this service guideline.
– If the module voltage is <40V but the single cell voltage is >1.5V, the
battery needs to be charged quickly while avoiding any further discharge.
Therefore shut down the system and search for 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 module is in Undervoltage: remove that one and try commissioning
without it (if the remaining modules still comply with the Compatible Inverter
List). Otherwise, make sure to avoid further over-discharge. (Turn off the
system completely)
– If one, or all modules 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) modules)
– Individual module voltages of all modules (related to Serial number)
– If possible: Logs from the battery using BCP (section 2.5) and Screenshots
showing the cell voltages
– Initial Firmware (FW) Version of the Battery when the UV happened (BMU and
BMS)
– Detailed description of how and why the system reached Undervoltage if
known. Information on 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 info@eft-systems.de and tell us the name of the system in the portal)
2.7 Visual Check
The PINs should not be bent. A module with twisted pins will still work as
long as it is the bottom module in the tower. So if you find twisted pins in a
module, make sure to position that module at the bottom of the tower.
2.8 Identifying a faulty module
– The module quantity must be adjusted in the app whenever the number of
modules is changed!
– Please perform a visual check of the communication pins according to step
2.7 for each module. – Normally a faulty module can be identified with the Be
Connect Plus Program or by the LED Code in the Battery Module. In this case,
remove the Module with the Event Code from the system, and commission the
remaining system (if it still complies with the minimum configuration list),
and check if it runs properly. If the problem remains, please also check the
module above the one with the Event Code.
– Otherwise, try the LVS Modules one by one, or by adding Modules one by one
into the tower and always check if the system can work properly to identify a
possibly faulty module.
SERVICE TASKS
Please go through the general steps beforehand, see chapter 1.
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 PDU Replacement
3.3 LVS Module Replacement
After replacing a Module, please do not forget to re-do the configuration and
firmware update in the app. (Every module has its own BMS)
BYD Battery-Box Premium LVS Service Checklist – V1.0 EN
Important: The installation and all other kinds of works or measurements in combination with the BYD Battery-Box are only allowed by professional and qualified electricians. Improper handling can cause danger and damage. This document does not replace the official BYD manuals and documents. No responsibility is accepted for the accuracy of the information.
GENERAL STEPS
Please carefully check all 7 „General Steps“ from page 3 of the Service Guideline and confirm this in the boxes below
| 1.1 Configuration| | 1.4 App Configuration| | 1.7 Correct Operation
---|---|---|---|---|---
| 1.2 Correct external cabling| | 1.5 Restart| |
| 1.3 Latest Firmware| | 1.6 Switch on the procedure| |
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
| 2.1 BMU shows no reaction / No LED
---|---
| 2.2 Communication problem with Inverter
| 2.3 Problem with the Firmware Update / App Configuration
| 2.4 BMU / BMS LED Event Code (EC)
| 2.5 Be Connect Plus (BCP)
| 2.6 Voltage measurement
| 2.7 Visual Check
| 2.8 Identifying a faulty module
SERVICE INFORMATION
Please fill in all available information in the below table. Some information like the Serial Number of the BCU is mandatory to receive service.
Service Ticket Number or System ID:|
---|---
• Installer / Delivery Address / Contact:
Company| | ZIP / City|
---|---|---|---
Contact Person| | Phone|
Street / Nr.| | Email|
• System Information
Battery Configuration (LVS…)| | BMU Firmware|
---|---|---|---
BMU Serial Number| | BMS Firmware|
BMU Connected to the Internet| Yes| No| Inverter Firmware|
Inverter Brand + Model| | Inverter Portal Name|
Inverter Serial Number| | Inverter Portal Name
(State the system name.Provideaccess)|
Commissioning Date| | |
• Service Information
BMU EventCode (EC)| |
Inverter Error Code
|
---|---|---|---
BMS EventCode(s) and related Module Serial Number(s)|
Was the battery charging/discharging before (was the system working normally
before?)|
Yes
|
No
Get Data of the Battery-Box with the Be Connect Plus (BCP) Program (see
chapter 2.5)|
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 behavior; pictures; app screenshots; module voltages… )
By contacting us you confirm, that a qualified person has done the necessary control and collected all available information above.Service Contact:
Europe: EFT-Systems GmbH
www.eft-systems.de
service@eft-systems.de
+49 9352 8523999
Australia: Alps Power Pty Ltd
www.alpspower.com.au
service@alpspower.com.au
+61 02 8005 6688
For Europe only: Register Ticket directly in the Online Service Center: https://support.eft-systems.de/
References
- 📧info@eft-systems.de
- ALPS POWER PTY LTD – BYD Battery-Box Australia Authorized Partner
- ALPS POWER PTY LTD – BYD Battery-Box Australia Authorized Partner
- BYD Battery-Box – BYD Battery-Box
- BYD Battery-Box – BYD Battery-Box
- Eft-Systems
- Eft-Systems
- Intranet EFT