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I am writing python software to communicate with the Sacolar 5000 kw (growatt spf 5000) inverter. It can read the holding and input registers and write to the holding registers. Nothing fancy. No flexDB or Grafana. It communicates via Modbus RTU...

I have a 15 cell battery less than 1 year old. One cell is out of balance. At the top end, if the other cells is above 3.5, that cell will only reach 3.45. On the lower end, if the other cells is still above 3v, the problem cell is already on 2.5 volt and the BMS shuts down. The pack is rated...