battery_compatibility:byd_b-box
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battery_compatibility:byd_b-box [2019-03-16 06:38] – guy_stewart | battery_compatibility:byd_b-box [2019-08-15 11:37] – replaced Venus-device with GX device guy_stewart | ||
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The combination of Victron products with BYD Battery-Box LV lithium batteries has been tested and certified by the Victron and BYD R&D departments. This combination has extensive field experience and is actively supported by both companies. | The combination of Victron products with BYD Battery-Box LV lithium batteries has been tested and certified by the Victron and BYD R&D departments. This combination has extensive field experience and is actively supported by both companies. | ||
- | The BYD B-Box includes an integrated Battery Management System (BMS) with each battery cell module, and a Battery Management Unit (BMU) that interfaces with the Victron [[venus-os: | + | The BYD B-Box includes an integrated Battery Management System (BMS) with each battery cell module, and a Battery Management Unit (BMU) that interfaces with the Victron [[venus-os: |
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- | === 1.2 A Venus-device is required, eg Color Control GX (CCGX), Venus GX (VGX), etc === | + | === 1.2 A GX device is required, eg Color Control GX (CCGX), Venus GX (VGX), etc === |
- | It is essential to use the CAN-bus connection of a [[venus-os: | + | It is essential to use the CAN-bus connection of a [[venus-os: |
- | When used with B-Box batteries, the minimum required firmware version for the [[venus-os: | + | When used with B-Box batteries, the minimum required firmware version for the [[venus-os: |
=== 1.3 All 48V Multis, MultiPlusses, | === 1.3 All 48V Multis, MultiPlusses, | ||
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The minimum firmware version is 422. Though updating to the latest firmware is recommended where possible. | The minimum firmware version is 422. Though updating to the latest firmware is recommended where possible. | ||
- | These inverter/ | + | These inverter/ |
- | In grid connected systems, advanced control functions are configurable in the ESS settings on the [[venus-os: | + | In grid connected systems, advanced control functions are configurable in the ESS settings on the [[venus-os: |
- | In off-grid systems, the control functions of the BYD Battery Management System (BMS) are built into the latest version of the [[venus-os: | + | In off-grid systems, the control functions of the BYD Battery Management System (BMS) are built into the latest version of the [[venus-os: |
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__MPPTs with a VE.Direct port__ | __MPPTs with a VE.Direct port__ | ||
- | MPPTs are controlled via the [[venus-os: | + | MPPTs are controlled via the [[venus-os: |
- | The MPPT requires connection to the [[venus-os: | + | The MPPT requires connection to the [[venus-os: |
- | To test operation, try disconnecting the [[venus-os: | + | To test operation, try disconnecting the [[venus-os: |
__MPPTs with a VE.Can port__ | __MPPTs with a VE.Can port__ | ||
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Minimum BYD firmware version: BMU_V2_V4-13_15-Mar-2017. | Minimum BYD firmware version: BMU_V2_V4-13_15-Mar-2017. | ||
- | On-screen, or via Remote Console on the [[venus-os: | + | On-screen, or via Remote Console on the [[venus-os: |
Batteries with older firmware versions can be updated. Please contact BYD for more information. | Batteries with older firmware versions can be updated. Please contact BYD for more information. | ||
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Each battery cell is approximately 50Ah at 48V (51.2V nominal). | Each battery cell is approximately 50Ah at 48V (51.2V nominal). | ||
- | The following charge rates are managed automatically by the BYD BMU and [[venus-os: | + | The following charge rates are managed automatically by the BYD BMU and [[venus-os: |
Using very large solar arrays with battery banks that are too small can exceed the limits of the batteries ability to charge and possibly lead to the BMU triggering over-current alarms. | Using very large solar arrays with battery banks that are too small can exceed the limits of the batteries ability to charge and possibly lead to the BMU triggering over-current alarms. | ||
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===== 3. CANBus Wiring ===== | ===== 3. CANBus Wiring ===== | ||
- | Use the //VE.Can to CAN-bus BMS type A Cable//, part number ASS030710018. Plug the side which is labeled Battery BMS into the BYD BMS. Plug the side labeled Victron VE.Can into the [[venus-os: | + | Use the //VE.Can to CAN-bus BMS type A Cable//, part number ASS030710018. Plug the side which is labeled Battery BMS into the BYD BMS. Plug the side labeled Victron VE.Can into the [[venus-os: |
- | Then, plug a [[https:// | + | Then, plug a [[https:// |
More information about the cable can be found in [[battery_compatibility: | More information about the cable can be found in [[battery_compatibility: | ||
- | Without properly connecting this cable, the battery will not show up on the display of the [[venus-os: | + | Without properly connecting this cable, the battery will not show up on the display of the [[venus-os: |
- | It is important to ensure this connection and display of the battery on the [[venus-os: | + | It is important to ensure this connection and display of the battery on the [[venus-os: |
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=== 4.2 Charge parameters === | === 4.2 Charge parameters === | ||
- | In normal operation, the charge parameters are controlled by the BYD BMU and communicated through the system by the [[venus-os: | + | In normal operation, the charge parameters are controlled by the BYD BMU and communicated through the system by the [[venus-os: |
=== Charger tab === | === Charger tab === | ||
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- | ===== 5. Venus-device Configuration ===== | + | ===== 5. GX device Configuration ===== |
- | On the [[venus-os: | + | On the [[venus-os: |
^Venus Settings -> System Setup Parameter ^ Value ^ | ^Venus Settings -> System Setup Parameter ^ Value ^ | ||
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===== 6. VE-Direct MPPT Settings ===== | ===== 6. VE-Direct MPPT Settings ===== | ||
- | In normal operation the MPPT charge characteristics are governed by the [[venus-os: | + | In normal operation the MPPT charge characteristics are governed by the [[venus-os: |
This section presumes familiarity with [[victronconnect: | This section presumes familiarity with [[victronconnect: | ||
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If the system is not operating correctly, go through these steps. | If the system is not operating correctly, go through these steps. | ||
- | === Step 0. If the Inverter/ | + | === Step 0. If the Inverter/ |
- | As a safety precaution, the inverter/ | + | As a safety precaution, the inverter/ |
- | You can then start the inverter/ | + | You can then start the inverter/ |
- | === Step 1. Check that the BYD battery is visible on the Venus-device list === | + | === Step 1. Check that the BYD battery is visible on the GX device list === |
{{: | {{: | ||
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If its not visible, check: | If its not visible, check: | ||
- | * [[venus-os: | + | * [[venus-os: |
* BYD firmware version (see requirement above) | * BYD firmware version (see requirement above) | ||
* CAN-bus communication cabling between BYD and Victron system. Make sure that it is in the right way around. If the special cable is plugged in reversed it won't work. | * CAN-bus communication cabling between BYD and Victron system. Make sure that it is in the right way around. If the special cable is plugged in reversed it won't work. | ||
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=== Step 2. Check that the BYD battery is ready for use === | === Step 2. Check that the BYD battery is ready for use === | ||
- | Check the Max Charge Voltage parameter. This voltage parameter is sent, together with the other three parameters, | + | Check the Max Charge Voltage parameter. This voltage parameter is sent, together with the other three parameters, |
When ready for use, the Max Charge Voltage will read 56.5 V. In case there is an error in the BYD system (wiring, addressing, or other), it will be 42 V: | When ready for use, the Max Charge Voltage will read 56.5 V. In case there is an error in the BYD system (wiring, addressing, or other), it will be 42 V: | ||
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=== 10.1 Inaccurate State of Charge (SoC) Readings === | === 10.1 Inaccurate State of Charge (SoC) Readings === | ||
- | Each BYD battery module has it’s own BMS. This BMS reports it’s battery information to the BMU which is connected to the [[venus-os: | + | Each BYD battery module has it’s own BMS. This BMS reports it’s battery information to the BMU which is connected to the [[venus-os: |
Each BYD module BMS has a threshold current of 1A (~50W) before it begins to report. For multiple modules, this is additive. So 4 modules could supply a 180W load and report it as 0 W. | Each BYD module BMS has a threshold current of 1A (~50W) before it begins to report. For multiple modules, this is additive. So 4 modules could supply a 180W load and report it as 0 W. | ||
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=== Work-arounds === | === Work-arounds === | ||
- | If precise state of charge is important, it is possible to install a Victron BMV shunt, and program the [[venus-os: | + | If precise state of charge is important, it is possible to install a Victron BMV shunt, and program the [[venus-os: |
The limitations of this method are if cells are added, removed or shut down, the BMV will continue to report SoC based on the total Ah of storage set. | The limitations of this method are if cells are added, removed or shut down, the BMV will continue to report SoC based on the total Ah of storage set. | ||
battery_compatibility/byd_b-box.txt · Last modified: 2024-01-22 07:32 by guy_stewart