No charging due to rapid overvoltage of one cell

[Philippe Damour]

Hello

Sorry to disturb you again !

I just noticed this morning that my system is not charging.

Monitoring screen is indicating 99% SOC.

I disconnected Load and Charge, checked if any sensing wire disconned.

Then restarted the SBMS0. SOC 49% as expected. Mesured each cell voltage and compared to monitoring screen. No discrepency. 

Reconnected  PV. Almost immeditly, cell #3 jumped to 3.66V and SBMSO ended charge and turn SOC to 99%.

What to check?

Thanks in advance.

Regards

Philippe