JK-BMS guides: settings, errors and presets
Practical guides on configuring a JK-BMS: changing settings over Bluetooth, safe parameter values, balancing, SOC calibration and fixing import errors.
Change JK BMS Settings over Bluetooth in Your Browser
Connect to a JK BMS from Chrome or Edge, read every setting, apply a preset and write it back in a safe order with read-back checks. No JK app needed.
JK BMS Balance Settings: Start Voltage, Trigger, Current
JK BMS balance settings explained: start balance voltage, balance trigger voltage, max balance current and the Balancer switch, for LFP, NMC and LTO.
JK BMS Cell Over Charge Protection Keeps Tripping: Causes and Fix
JK BMS cell over charge protection tripping and releasing every minute? See why a charger set too high causes it, how to tell it from a weak cell, and how to fix it.
How to export and read the JK-BMS Detail Log
What the JK-BMS Detail Log contains, how to export it from the app, how to read its events and what the log analysis page tells you about trips and faults.
Export and Import JK BMS Settings: The .jkcfg File Guide
How to export and import JK BMS settings with the app, what the .jkcfg file contains, why hand edits break it, and how to edit it safely in your browser.
JK BMS Settings for LiFePO4: 8S and 16S, 280Ah and 314Ah
JK BMS settings for LiFePO4 packs: per-cell voltage, balance, current and temperature values for 8S and 16S with 280Ah and 314Ah cells, in three wear levels.
JK BMS Log Messages Explained: Boot, Time calibration, Protections
What each JK BMS log message means: Boot, Time calibration, APP open charge, protection trips and releases, Discharge On Failed and Unknown Log Code [0].
JK BMS Settings for NMC and LTO: Safe Per-Cell Values
JK BMS settings for NMC and LTO packs: per-cell OVP, UVP, balance, temperature and C-rate values in three wear levels, plus how the editor detects chemistry.
JK BMS Overcurrent Protection Settings: OCP and SCP Guide
JK BMS overcurrent protection settings explained: charge and discharge OCP limits, delays, recovery times and SCP, with ranges and sizing for inverters.
JK BMS Parameters Explained: Every Setting by Group
JK BMS parameters explained in one glossary: cell OVP, OVPR, UVP, UVPR, balance, SOC, RCV and RFV, current and temperature limits, with typical LFP ranges.
JK BMS Password: Default Codes, Change and Reset Guide
Your JK BMS password is really two codes: Bluetooth and settings. See factory defaults, how to change them, what to try if one fails, and what to do if lost.
JK BMS Reboots and Charge MOS Off: Reading Power Events in the Log
JK BMS reboots or the charge MOS switched off by itself? Learn to read Boot rows and MOS state in the Detail Log and tell expected restarts from real faults.
JK BMS Sending failure: Causes and Step-by-Step Fix
JK BMS Sending failure on import? See why the firmware rejects settings (voltage chains, write order, SCP delay) and how to fix it step by step.
JK BMS SOC Calibration: Fix SOC Drift, Jumps and Reset
JK BMS SOC calibration explained: why SOC drifts or jumps, what the SOC-100% voltage and SOC-0% voltage do, and how to set them and recalibrate the pack.
Find a Weak Cell with the JK BMS Log: Trips, Spread and Balance
Find a weak cell in the JK BMS Detail Log: which cell trips first, how wide the spread is at the trip, and whether it is balance drift or a bad cell.
JK BMS Wire Resistance: Fix Abnormal Balance Wire Alarm
JK BMS wire resistance explained: what the abnormal resistance of the balance wire warning means, normal values, common causes and how to fix a bad lead.