battery_compatibility:byd_b-box
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
battery_compatibility:byd_b-box [2019-02-12 21:33] – guystewart | battery_compatibility:byd_b-box [2019-08-15 11:37] – replaced Venus-device with GX device guy_stewart | ||
---|---|---|---|
Line 3: | Line 3: | ||
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: |
Line 29: | Line 29: | ||
- | === 1.2 A Venus-device is required, | + | === 1.2 A GX device is required, |
- | It is essential to use the CAN-bus connection of the CCGX or VGX with the BYD batteries for the keep-alive signal, communication of charge and discharge limits, error codes and state of charge. | + | 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 [[https:// | + | When used with B-Box batteries, the minimum required firmware version for the [[venus-os:start|GX device]] is v2.15. It is highly recommended to use the latest firmware version on all connected devices, including CCGX/VGX, Inverter/ |
=== 1.3 All 48V Multis, MultiPlusses, | === 1.3 All 48V Multis, MultiPlusses, | ||
Line 39: | Line 39: | ||
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: |
Line 55: | Line 55: | ||
__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__ | ||
Line 83: | Line 83: | ||
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. | ||
Line 94: | Line 94: | ||
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. | ||
Line 156: | Line 156: | ||
===== 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: |
Line 195: | Line 195: | ||
=== 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 === | ||
Line 237: | Line 237: | ||
- | ===== 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 ^ | ||
Line 256: | Line 256: | ||
This parameters page is also a good place to check that all batteries are connected and working properly. In normal working conditions, for the 2.5 model, the current limit is 35A per cell. For example, 140A charge current limit ( 140 / 35 = 4 ) means there are 4 BYD battery cells connected. | This parameters page is also a good place to check that all batteries are connected and working properly. In normal working conditions, for the 2.5 model, the current limit is 35A per cell. For example, 140A charge current limit ( 140 / 35 = 4 ) means there are 4 BYD battery cells connected. | ||
+ | Note this figure has been increased in recent firmware versions - so it may appear slightly higher (eg 40A per cell). | ||
=== Color Control GX Configuration === | === Color Control GX Configuration === | ||
Line 270: | Line 271: | ||
===== 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: | ||
Line 288: | Line 289: | ||
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 === |
{{: | {{: | ||
Line 300: | Line 301: | ||
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. | ||
Line 307: | Line 308: | ||
=== 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: | ||
Line 313: | Line 314: | ||
{{: | {{: | ||
- | Also check that your are seeing the expected | + | Also check that your are seeing the expected |
Locally on-site, you can check the Run LED on the BYD BMU, it needs to be lit up continuously: | Locally on-site, you can check the Run LED on the BYD BMU, it needs to be lit up continuously: | ||
Line 353: | Line 354: | ||
=== 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. | ||
Line 367: | Line 368: | ||
=== 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. | ||
Line 407: | Line 408: | ||
There has been a firmware revision for the BYD battery modules and BMU that improves cold weather performance slightly. This manual will be updated with the new (slightly improved) specifications when stock supplied with the new firmware has had sufficient time to enter the market. Contact your BYD distributor for further information about this. | There has been a firmware revision for the BYD battery modules and BMU that improves cold weather performance slightly. This manual will be updated with the new (slightly improved) specifications when stock supplied with the new firmware has had sufficient time to enter the market. Contact your BYD distributor for further information about this. | ||
+ | |||
+ | === 10.4 Self-Startup from Low voltage shutdown modes === | ||
+ | |||
+ | In a correctly configured system, the inverter will shut itself down before the batteries enter a self protective shut down state. | ||
+ | |||
+ | If your system is supplied only with AC-bus solar charging, this may prevent the solar inverter from starting up to recharge the batteries. Therefore it is strongly recommended that there is also either a generator or DC MPPT charge controller to provide DC bus power to bring the inverter back online to allow normal recharging to resume. | ||
+ | |||
+ | Even a single 100/20 48V MPPT charger unit with 2 x 60 cell solar panels would be sufficient to add this self correcting mechanism able to maintain the DC bus voltage and improve longterm system reliability considerably from accidental deep discharge and subsequent shut down. | ||
+ | |||
===== 11. Further Information ===== | ===== 11. Further Information ===== | ||
Line 416: | Line 426: | ||
===== DISQUS ===== | ===== DISQUS ===== | ||
~~DISQUS~~ | ~~DISQUS~~ | ||
- |
battery_compatibility/byd_b-box.txt · Last modified: 2024-01-22 07:32 by guy_stewart