incorrect battery voltage, stuck SOC about sungrow-shx-inverter-modbus-home-assistant

[mkaiser]

I have a Pylontech Force H1 Battery with 14,4kWh (4 modules)
datasheet

The datasheet states, that each module has a default voltage of 48VDC. 4* 48V = 192 V.
In my case this matches the sensor values pretty good (0%: 192V to 100%: 202V). min SoC is at 10% and max Soc at 95%

The battery power (voltage * current) looks okay for me, too:

[elektrinis]

Hm.. Sungrow battery uses LiFePO4 cells with voltage range of 2.5-3.65V, single box is 20s and in my case 3 modules were used, so 60s. In this case the full range of voltage should be 150-219V, which is actually as declared in the datasheet of SBR096.
So it looks like there are some extra issues with inverter or battery/BMS, as not full range is being used. I am also noticing that actual capacity is lower than declared by 20%, even though min/max SOC is set to full range and reserve is set to 0%.

I have also observed a sudden drop of SOC from 100% to 8.8% (after sitting fully charged for a week).

I understand this is an issue with inverter/battery itself (not the integration), just wanted to let you know, and maybe others. I will keep my eye on it.

[elektrinis]

I'm closing this as it's likely a battery issue.