JK Inverter BMS Firmware 15.38 Stuck on Bulk- not going to Absorption and Float. new bug?

[TechSree]

Using JK ESS BMS and firmware version 15.38, Mobile app 5.0.1. When checking the status of charging its not always working correctly as per the new charging algorithm. I tried with the following values
RCV - 3.460, SOC 100% - 3.450, RCV Timer - 1, RFV Timer -6 - In some days it will go to Absorption after 4 or 5 hrs of of reaching all cells to 3.450V
RCV - 3.450, SOC 100% - 3.440, RCV Timer - 1, RFV Timer -6 -In some days it will go to Absorption after 4 or 5 hrs of of reaching all cells to 3.440V
Also noticed that when changing the RCV from 3.450 to 3.457 then back to the old value after 1 minute its triggering the Absorption when I tested last 2 days. but its not possible to do like this every day so i think there is a bug with 15.38. Tested this on 2 JK bms and getting almost same result. Anyone else having the same issue ? and is there any solution ?

Note : Using 2 JK BMS in parallel, also tested the issue by connecting as single BMS without parallel communication. Tried changing the master battery but the results are same

 

[TechSree]

one thing i have noticed that some time if we are changing the RCV to 3.460V from 3.450 and then reverting back to 3.450V then it will trigger the Float charge mechanism.

 

[ChrisG]

I would search in this thread. Lot of info and issues on these new JKs.

Thread 'JKBMS Inverter Edition Problems/Issues | No Support / Help to fix major issues. - DO NOT BUY ! Warning (as of Oct.12.2024)'

Aug 5, 2024

EDIT October 12.
As of Today I changed the title to DO NOT BUY. The ongoing games, misinformation (by JK) and total lack of interaction makes this point.
DO NOT TRUST OR BELIEVE anything advertised or posted until IT IS PROVEN - Tested & Verified independently by at least 3 Different Entities.

---

EDIT: AUGUST 16.
Today is / was cutoff day for response. None received and no solutions are forthcoming.
DO NOT EXPECT Support or Help from JiKong !
There was going to be an additional Thread to NOT BUY or DO SO AT YOUR RISK but this thread will...

• Steve_S
• Replies: 1,487
• Forum: BMS (Battery Managment Systems)

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[kommando]

Not sure it is a bug or Andy's requests ending up with a complicated solution that does not work other than on Victron.

Check the flow chart in the link @ChrisG posted.

 

[AshleyL]

Your SOC 100% - 3.450v is too close to your RCV - 3.460v. Space them at least 0.040v apart, which is 3.42V for SOC 100%.

 

[TechSree]

Battery shows 55.23V Inverter shows 55.3V when i have given RCV 3.460 and 100% soc volt as 3.440 and I have calibrated the BMS since there was a 7 mV difference with inverter reading, today its working fine and working as expected. I didn't given more proper attention to the 7mV difference since all cells are above 100% soc Volt but it looks like we need to keep it at RCV volt. Thanks @AshleyL ,@RCinFLA @ChrisG and all other members those who helped to solve the issue.

 

[Orlando]

Battery shows 55.23V Inverter shows 55.3V when i have given RCV 3.460 and 100% soc volt as 3.440 and I have calibrated the BMS since there was a 7 mV difference with inverter reading, today its working fine and working as expected. I didn't given more proper attention to the 7mV difference since all cells are above 100% soc Volt but it looks like we need to keep it at RCV volt. Thanks @AshleyL ,@RCinFLA @ChrisG and all other members those who helped to solve the issue.

Do you have only 1 battery or more than 1 battery in parallel? Did you chage the settings on all the slave BMS too? I have a 0.01 V diff beteen 100% SOC and RCV, all the cells go over the 100% SOC Voltage (I can see that on the app) but the BMS never switches float. I have 3 JK BMS in parallel.

 

[TechSree]

Do you have only 1 battery or more than 1 battery in parallel? Did you chage the settings on all the slave BMS too? I have a 0.01 V diff beteen 100% SOC and RCV, all the cells go over the 100% SOC Voltage (I can see that on the app) but the BMS never switches float. I have 3 JK BMS in parallel.

using 2 battery packs in parallel. changed settings on 1 bms and added extra 15mv to master only. Now its working fine as expected

 

[miran90]

Calibrate BMS voltage 0.3v above real voltage and see it will reset to 100%.