Battery capacity

[Bimboboy007]

Description

Battery capacity is not displayed correctly, I have 100kwh storage and only 25kwh is displayed.

Reproduction Steps

I have 2 Deye in parallel and on one of them the software shows 35kwh on the master and 25kwh on the slave.

Log

home-assistant_solarman_2025-02-19T15-38-42.559Z.log

Version

25.02.14

Home Assistant Core Version

2025.2.4

Home Assistant Operating System Version

14.2

[sofkaski]

@Bimboboy007 Are you referring to sensor.inverter_battery_capacity? As I have understood that sensor monitors changes in battery capacity over time and calculates how much the battery is charging or discharging in relation to its State of Charge (SOC). It keeps history of the estimate (in states attribute of the sensor) and the state value is an average of historical values.

Therefore the capacity may well be off in the beginning when there has not yet been enough charge/discharge cycles.
E.g value in my system is currently 16.6 kWh. The value has been varying 10 - 40 kWh during the time it has been on in my system. My battery is 280 Ah and thus the theoretical capacity is about 15 kWh. So, the sensor value seems to get closer to the theoretical capacity over time.

@davidrapan Is my assumption correct?

[Bimboboy007]

I have 2 Deye in parallel and actually assumed that the total capacity would be displayed on the mast, but from the looks of it, each one shows something different.
The master 12K 32kw ​​and the 10k slave 25kw. I have a total of 100 kWh of storage, so in order to get the correct value I would have to create a sensor and add both values ​​together.