REQ: Add state class for "State of Charge" sensors (since 2026.6.0)

[pergolafabio]

Feature Description

Hi @tomquist , me again =-)

Can you add the classed also for the "state of charge" sensors? there is a new feature since 2026.6 , that we can add this sensor to the energy dashboard, however, the correct classes are missing, not sure if the device_class is correct here, maybe it should be "power/energy" , see below

thnx again!

Device Model (optional)

No response

Firmware Version (optional)

No response

[pergolafabio]

for now did it temporary with customize, so adding only : state_class: measurement , was enough to add those to energy dashboard

sensor.marstek_1_battery_state_of_charge:
  state_class: measurement
sensor.marstek_2_battery_state_of_charge:
  state_class: measurement
sensor.marstek_3_battery_state_of_charge:
  state_class: measurement

[tomquist]

Thanks for the research. Fixed via #311 and #312