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--- battery_compatibility:byd_b-box [2020-03-18 13:35] – guy_stewart
+++ battery_compatibility:byd_b-box [2020-03-18 17:34] – [5. GX device configuration] mvader
@@ Line 4: / Line 4: @@
 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:start|GX device]] and supports multiple battery modules.
 ^  Battery ^  Pro 2.5-10.0 ^  Pro 12.8 & 13.8 ^  L 3.5-14.0 ^ Premium LVL 15.4 ^
@@ Line 15: / Line 13: @@
 |  Module limit |  32|  32|  12|  64|
 |  Max capacity|  80 kWh|  441.6 kWh|  42 kWh|  983 kWh|
 ===== 1. Product & System compatibility =====
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   * Grid Backup
   * Off-grid
 === 1.2 A GX device is required, eg Cerbo GX, Color Control GX (CCGX), Venus GX (VGX), etc ===
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 It is essential to use the BMS-Can (or CAN-bus) connection of a [[venus-os:start|GX device]] with the BYD batteries for the keep-alive signal, communication of charge and discharge limits, error codes and state of charge.
-When used with B-Box Pro series batteries, the minimum supported firmware version for the [[venus-os:start|GX device]] is v2.42. When used with B-Box Premium LV series, the minimum supported GX device firmware version is v2.52. It is highly recommended to use the latest firmware version on all connected devices, including CCGX/VGX, Inverter/Charger and MPPTs. There are regular updates to improve performance and reliability.
+When used with B-Box Pro series batteries, the minimum supported firmware version for the [[venus-os:start|GX device]] is v2.42. When used with B-Box Premium LV series, the minimum supported GX device firmware version is v2.52. It is recommended to use the latest firmware version on new installations and when trouble shooting issues.
 === 1.3 All 48V Multis, MultiPlusses, MultiGrids and Quattros are compatible ===
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 In off-grid systems, the control functions of the BYD Battery Management System (BMS) are built into the latest version of the [[venus-os:start|GX device]].
+=== 1.4 Solar Charger compatibility ===
+All 48V BlueSolar and SmartSolar VE.Direct MPPT Chargers are compatible (*).
+Some of our Solar Chargers feature a VE.Direct communication port, some feature a VE.Can communication port, and some feature both. Both of these types of communication ports can be used to connect the Solar charger to the GX Device. Such connection is mandatory, because it is used to regulate charge currents and voltages.
-=== 1.4 All 48V BlueSolar and SmartSolar VE.Direct MPPT Chargers are compatible ===
+When planning to use the VE.Can communications port to connect the Solar Charger(s), make sure to select a GX Device that has sufficient CAN-Bus ports. The Color Control GX has only one such port, its VE.Can port, and is therefor not suitable. All other GX Devices can be used, since they have two ports. One can then be used to connect the BYD battery, and the other to connect the Solar Charger.
-For proper operation, the B-Box battery needs to be able to control the charge current of the solar MPPTs.
-It is recommended to use the MPPTs with VE.Direct port with BYD batteries.
-__MPPTs with a VE.Direct port__
-MPPTs are controlled via the [[venus-os:start|GX device]]. Make sure the [[venus-os:start|GX device]] runs v2.42 (or v2.52 for LVL) or later, and the MPPTs to 1.46 or the latest available version.
-The MPPT requires connection to the [[venus-os:start|GX device]] to regulate charge currents as the batteries require (due to temperature, etc)
-To test operation, try disconnecting the [[venus-os:start|GX device]] from the MPPT. After a time-out, the MPPT will stop charging and flash an error code on its LEDs. The error code is [[https://www.victronenergy.com/live/mppt-error-codes#err_67_-_no_bms|error #67: no BMS]].
-__MPPTs with a VE.Can port and VE.Direct port__
-Firmware should be at least version 1.04.
-When using VE.Can MPPT's, it is recommended to use the a [[venus-os:start|GX device]] with a BMS-Can interface as well as the VE.Can interface (eg Cerbo GX, or Venus GX), instead of the CCGX. This allows communication between the MPPTs, BYD and the GX Device.
-Please note that older model VE.Can MPPTs (without VE.direct and with built in screen) are no longer supported with BYD managed batteries for new installations. Legacy systems that were historically installed with this configuration using the allow to charge contacts are not required to make any changes.
+(*) with exception of the models “BlueSolar MPPT 150/70 CAN-bus” and “BlueSolar MPPT 150/85 CAN-bus” which are end-of-life since 2019. Legacy systems, historically installed with this configuration using the allow to charge contacts are not required to make any changes, see the legacy chapter below for details.
 === 1.5 Battery compatibility ===
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 === Battery Modules Required - Pro 2.5 ===
 |Phases|  Single Phase|  Three Phase|  Single Phase|  Three Phase|
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+===== 3. CAN-Bus wiring between the battery and GX Device =====
-===== 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:start|GX device]].
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 It is important to ensure this connection and display of the battery on the [[venus-os:start|GX device]] display before attempting firmware updates or settings changes on other devices if they depend on the power supply from the battery. Without this connection, the battery may turn off unexpectedly. If a reliable DC power supply is required, you can temporarily disconnect the individual BYD battery cells inside their cabinet from the internal Battery Management Unit (BMU). It is the BMU that signals the battery cells to shut down if the signal from the [[venus-os:start|GX device]] has not been received. This is a temporary measure, DO NOT attempt to operate the battery cells normally without connection to the BMU.
-=== 3.1 Legacy Systems using Allow-to-charge and allow-to-discharge contacts ===
-This section is for Legacy systems that have VE.Can MPPTs without a VE.Direct port, and BYD B-Box Pro batteries. These systems were configured using Allow-to-charge contacts. This configuration is not supported with Premium LVL, or other BYD batteries.
-If you have an existing system that is configured using the Allow-to-charge contacts, and it is operating correctly, you do not need to make any changes.
-The BlueSolar MPPTs with a VE.Can (and no VE.Direct port) port have a dedicated Remote On/Off input. It needs to be connected to battery positive to enable the charger. Leaving the Remote On/Off input floating or pulling it to ground will disable the charger.
-B-Box relays:
-  * Relay T1-T2: closed if allowed to discharge
-  * Relay T4-T5: closed if allowed to charge
-{{:battery_compatibility:byd_bmu.jpg?nolink&400|}}
 ===== 4. VEConfigure settings =====
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-===== 5. GX device Configuration =====
+===== 5. GX device configuration =====
 On the [[venus-os:start|GX device]], go to Settings, System setup:
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 |Shared Voltage Sense |OFF|
-If you have a VE.Can MPPT, it is advised to use the Venus GX in place of the CCGX.
 * Select the //CAN-bus BMS (500 kbit/s)// CAN-profile in the CCGX. Menu path: //Settings -> Services -> CAN-profile//.
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 The CAN-bus connections are galvanically isolated at the BYD BMU. There is no issues using the non-isolated connection of the VGX.
-===== 6. VE-Direct MPPT Settings =====
+===== 6. Solar Charger configuration =====
-In normal operation the MPPT charge characteristics are governed by the [[venus-os:start|GX device]] connected to the BYD battery.
+The MPPT charge characteristics are automatically configured & governed by the [[venus-os:start|GX device]]. The settings below are a precautionary measure only:
-This section presumes familiarity with [[victronconnect:start|VictronConnect]]
+^ MPPT Parameter ^ Setting ^
+|Battery voltage     |48V|
-The settings below are a precautionary measure.
-^MPPT Parameter ^ Setting ^
-|Battery voltage.     |48V|
 |Absorption voltage   |56.5V|
+Use [[victronconnect:start|VictronConnect]] for Solar Charger configuration.
 ===== 7. Example Wiring Diagram =====
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   * Could be a temporary issue, that corrects self automatically after a short while (matter of minutes).
   * Could be an external issue, unacceptable voltage or current.
 ===== 9. Step by Step Installation Guide =====
 There is a step by step installation video that demonstrates the essential connections and programming that is required for installation of a BYD battery in a Victron system. It is accessible via the [[https://professional.victronenergy.com/api/accounts/e-learning/?service=https%3A//www.easy-lms.com/victronenergy/login|E-Learning section in Victron Professional]], and a [[https://professional.victronenergy.com/accounts/sign-up/|free Victron Professional Installer Account]] is required.
 [[https://professional.victronenergy.com/api/accounts/e-learning/?service=https%3A//www.easy-lms.com/victronenergy/login|{{:battery_compatibility:byd_installation.jpg?400|}}]]
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 This written manual should be assumed to be the more accurate and up-to-date, if there are any discrepancies between the video and the written manual,
 A user contributed [[battery_compatibility:byd_b-box-steps|step by step installation guide is available here.]] Please be aware that this guide is no longer current. It should not be considered a best practice, but provides further detail and insights from an actual installation.
 ===== 10. Known Issues =====
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 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. Legacy systems using allow-to-charge and allow-to-discharge contacts =====
+For proper operation, the B-Box battery needs to be able to control the charge current of the solar MPPTs. Which for all modern models is arranged via the VE.Can and VE.Direct digital communication protocols. The very first two BlueSolar Chargers made by Victron, the “BlueSolar MPPT 150/70 CAN-bus” and “BlueSolar MPPT 150/85 CAN-bus” models, do no support such control, and were therefor controlled with a wire: the allow-to-charge wire.
+The purpose of this chapter is to serve as reference guide for legacy systems using those two solar charger models. If you have an existing system that is configured using the Allow-to-charge contacts, and it is operating correctly, you do not need to make any changes.
+Note that these charges cannot be used with the BYD Premium LV batteries, since they do not feature the required free contacts.
+=== Legacy system wiring details ===
+The Remote On/Off input of the two mentioned solar charger models is used to signal that they can or cannot charge the battery. It needs to be connected to battery positive to enable the charger. Leaving the Remote On/Off input floating or pulling it to ground will disable the charger.
+B-Box relays:
+  * Relay T1-T2: closed if allowed to discharge
+  * Relay T4-T5: closed if allowed to charge
+Picture showing these connections on the BYD B-Box battery:
+{{:battery_compatibility:byd_bmu.jpg?nolink&400|}}
+===== 12. Further Information =====
 For information about where to buy or find suitably qualified installers, visit the [[https://www.victronenergy.com/where-to-buy|Where to Buy Page.]]