Learn how to resolve the BMS Communication Lost error on EG4 batteries after firmware updates.
BMS Communication Lost can occur due to firmware incompatibility or connection issues. Ensure all connections are secure and the firmware is up to date.
To reset the BMS, power down the battery and disconnect it from the system. Wait a few minutes before reconnecting and powering it back on.
The loss of communication between the battery management system (BMS) and the inverter typically triggers a fault due to the need for real-time data exchange for optimal performance. The BMS monitors the battery's state of charge, temperature, and health, while the inverter relies on this data to manage power flow effectively. If the BMS fails to communicate, the inverter may enter a protective state to prevent potential damage, resulting in reduced output or shutdown. This can occur due to factors such as incorrect RISO measurements, which may indicate insulation issues, or ground fault detection, which can disrupt communication signals.
After a firmware update, users may observe that the battery system is not responding correctly. Common indicators include blinking LEDs on the inverter, an alert on the monitoring app indicating 'BMS Communication Lost,' and a noticeable drop in system performance or output. The inverter may also display an error code related to communication failure.
Always consult a licensed electrician or certified solar installer when troubleshooting electrical systems. Working with high-voltage components can be dangerous and should only be performed by qualified personnel.
To avoid future BMS communication issues, ensure that firmware updates are performed correctly and that all cables are inspected regularly for wear and tear. Additionally, maintain proper environmental conditions to reduce electrical noise and interference, and keep the inverter and BMS firmware versions synchronized.