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  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    After much searching I found the JK BMS, with it's 2A built-in active balancer it was just what I was looking for. I wanted to connect my JK-BMS to my inverter like a commercial battery to ensure the inverter knows what the battery is up to in terms of Charging, Discharging, Alarms etc. If you...
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    No, the JK BMS CAN port is not active unless you buy the CAN model and their CAN adaptor, the port is TTL level and the protocol is non standard for energy storage inverters. There would be no point in converting it to CAN then converting it back to TLL for the ESP32 and then decoding the non...
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    Sneak peak of what i have been working on: Complete rework of the charging logic, now charges with constant current(CC) to the absorption voltage, then has an absorption timer (Constant Voltage, user configurable time), with rebulk feature (user configurable offset from absorption voltage). Live...
  • Post in thread: ESP32 JK BMS CAN

    Yep me, but I wrote it :-P See more info here: https://diysolarforum.com/threads/jk-bms-can-bus-comms-now-possible-for-inverters-that-support-goodwe-and-pylontech-batteries.48963/
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    New version: V1.04 20/10/22 Added logic for calculating SOH, is now based on number of cycles/max_cycles, Added CAN messages 0x70, x371 cell temp and voltage info For full change log:- https://github.com/Uksa007/esphome-jk-bms-can/discussions/2
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    ESPHome is free software that makes it easier to install firmware on microprocessors and optionally integrate with Home Assistant. I do not recommend Bluetooth, you should use a cable to connect to the JK BMS RS485 port. You Need: ESP32 microprocessor, development board is best I use esp32doit...
  • Post in thread: JBD/Overkill BMS CAN bus comms support for inverters

    Hardware interface prototype has be assembled and is in testing. Hardware interface has support for Overkill/JBD and code is in full testing using a JBD-SP25S003-L16S-100A
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    Update on Hardware interface. I have made a prototype hardware interface that will essentially make it plug and play for most inverters, more details on my Patreon. Hardware interface will be available to purchase for Patrons.
  • Post in thread: [SOLVED: (NEWBIE ERROR)] JK BMS (JK-B2A24S20P) 43.0V PD between B+ BMS cable & Battery +ve (16S configuration)

    Have to disagree on that one, I have a few cells that are runners right up till 3.45v, where they seem to be overtaken by the rest and then become the lowest voltage cells. I set my balancer to start at 3.45v and that seems to works the best for me. Note LF280k cells charging at 90A Yes I have...
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    Hi, I did initially implement this, but found that it was unnecessary, once the battery has been top balanced, as the voltage approaches the set charging/absorption voltage the battery on it's own will reduce/ramp down the current to 0 I'm in the middle of testing a more robust charging...
  • Post in thread: JBD/Overkill BMS CAN bus comms support for inverters

    JBD/Overkill code soon moving to Beta and What you have all been waiting for! Update: Multi BMS Alpha code updated. Update: Alpha V2.16 more info here I completed and implement the initial design, the data is now combined from the slaves as per the design. I have made many improvements and...
  • Post in thread: Sol-Ark 8k CANbus message protocol?

    There are numerous different CAN protocols depending on the battery profile used. It seems Sol-Ark supports Pylontech, which is one of the more common protocols. This document should help: https://solaranzeige.de/phpBB3/download/file.php?id=2373 If you are using or plan to use a JK BMS I have...
  • Post in thread: [SOLVED: (NEWBIE ERROR)] JK BMS (JK-B2A24S20P) 43.0V PD between B+ BMS cable & Battery +ve (16S configuration)

    You should have 52V at the Battery +- terminals, if not you have connection issues with bus bars. Follow the instructions that came with JK BMS: The BMS B-(blue) needs to go directly to the Battery - The BMS P-(black) can go to circuit breaker and shunt. Meter from the Battery terminals +- out...
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    Hardware interface prototype has be assembled and is in testing. More info and first orders at Patreon.
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    The Heat+CAN mode has Heat output and CAN(not used as it is proprietary JK protocol) Both will work, if you need the heat function get the Heat version if not, get the non Heat version.
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    I have been doing OTA updates for several months without any issues, but I disable charge and discharge first to ensure there is no effective use of the battery, as it does reboot EPS32.
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    1. There is no such value id(state_of_charge), id(capacity_remaining) is the SOC. 2. SOC is often not accurate and can drift over time if it doesn't get reset. Charging to a set voltage is the most accurate way. Adjust rebulk_offset lower to trigger charging when you what it. The default...
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    Learning involves reading, research, critical thinking, trial and error, if you really want to lean I suggest you start doing this. This is an advanced project, you will need to have a advanced understanding of electronics, be able to read circuit diagrams, construct circuits, install and...
  • Post in thread: JBD/Overkill BMS CAN bus comms support for inverters

    Thanks for your comments, I have discussed with the Mods and Will, and they have kindly allowed it. I'm not commercial, just one guy trying to make something others might find helpful. It will be released on github like my JK-BMS version is, currently the JBD version is not fully functional and...
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    I have released the new version: https://github.com/Uksa007/esphome-jk-bms-can/discussions/2 V1.11 4/12/22 Tested on ESPHome Version: 2022.11.4, upgrade by running "pip3 install -U esphome" Complete rework of the charging logic, now charges with constant current(CC) to the absorption voltage...
  • Post in thread: Phocos & JK BMS communication

    The JK-BMS CAN version uses its's own CAN protocol. I have built an interface board kit and software that allow communications between the JK-BMS and Inverters supporting CAN bus(pylon protocol) See here for more info, it may be what you are looking for...
  • Post in thread: JBD/Overkill BMS CAN bus comms support for inverters

    Hi, Updade: Support now available for JBD/Overkill BMS CAN bus comms for inverters similar to my JK-BMS CAN bus project. This would also facilitate integration with Home Assistant and control of the battery/inverter remotely see my JK-BMS CAN comms for example: My Hardware interface now...
  • Post in thread: JBD/Overkill BMS CAN bus comms support for inverters

    My project would enable JBD/Overkill BMS CAN comms with all inverters that support the Pylon/Goodwe LV protocol, which would be almost all LV battery/hybrid inverters, not just Victron.
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    V1.05 30/10/22 Fixed alarms Everyone should upgrade to this version to ensure the alarms are sent correctly to the inverter!
  • Post in thread: JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    Hi, I have set up Pateron to help fund future development. Additional info will be published to "Be in the know" Pateron membership levels and above like: What development is coming soon Development that has been completed and is in Alpha/Beta testing Get early access to Alpha/Beta code for...
  • Post in thread: JBD/Overkill BMS CAN bus comms support for inverters

    Initially it will be single BMS per inverter with Home Assistant integration, you have to walk before you run! Once the Multi BMS goal is reached it will enable me to purchase another set of batteries/hardware to finish development, test and release Multi BMS support. If you want this feature I...
  • Post in thread: What brands of BMS work with Solark in Closed Loop Communication

    The inverter manual says it supports 00: CANBus Battery mode My Hardware Interface works with JK-BMS and JBD/Overkill(still in Beta testing) with CAN bus Inverters. I would recommend the JK-BMS as it's what I use. More info...
  • Post in thread: Cell voltage fluctuation

    This would suggest you have a bad connection in either the balancer leads, or the bus bars. Did you crimp or solder the balancer leads ring lugs, I find crimp and soldering them is a better connection.
  • Post in thread: JBD/Overkill BMS CAN bus comms support for inverters

    The EG4 6000XP seems to support Pylon CAN protocol, so I don't see why it wouldn't work. It uses the UART port that the dongle uses. Consider the JK-BMS if you want both Bluetooth app and my board connected. I have replied to your private conversation also. Regards.
  • Post in thread: Phocos & JK BMS communication

    Do you have any ability to log the data from the inverter or better connect an ESP32, I have started working on Pylon RS485 comms for JK-BMS More info here: https://github.com/Uksa007/esphome-jk-bms-can/discussions/27
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