Fine fine......
Using Growatt SPF 3000, 5000 and 6000 ES.
Have both V14 and V15 hardware with latest firmware available (v14.20 and v15.27)
Tried Pylontech and Growatt protocol on JKBMS, no luck with SOC100% stop charging.
*Growatt inverter only support Pylontech and Growatt own protocol*
Critical issue with JKBMS coulomb counting, it doesn't take account of voltaic and coulombic efficiency during charge and discharge cycle.
It will always take more power to re-charge a discharged battery.
From what I can see, JKBMS actually expects 100% efficiency in charge and discharge cycle, duh.......assuming if the 100% is not triggered by single cell voltage, the coulomb counter gonna trigger 100% without actually fully charging the battery.
Example, after discharging a 280ah battery pack by 200ah, it requires 201ah or 205ah to fully recharge the pack again.
Charging and discharging several times in a day gonna cause the SOC % to drift negatively for certain.