Battery SoC not correct wehn muultiple batteries connected

[tomgeyer]

Describe the bug

The calculation of the total SoC over all connected batteries is incorrect in my case.
In my case, one battery is configured in the UI, and the other is configured in the yaml.

Steps to reproduce

...

Configuration details

This is the configuration of the second battery in the yaml:

- name: DIY
  type: custom
  power:
    source: modbus
    uri: 192.xxx.xxx.xx:502  # Anzupassen
    id: 2             # Ggf. anzupassen:
    register:
      address: 258 # active DC power
      type: input
      decode: int16
    scale: -1
  soc:
    source: modbus
    uri: 192.xxx.xxx.xx:502  # Anzupassen
    id: 2             # Ggf. anzupassen
    register:
      address: 266 # Soc
      type: input
      decode: uint16
    scale: 0.1

Log details

There are no specific log entries.

What type of operating system or environment does evcc run on?

Linux

External automation

• I have made sure that no external automation like HomeAssistant or Node-RED is active or accessing any of the mentioned devices when this issue occurs.

Nightly build

• I have verified that the issue is reproducible with the latest nightly build

Version

No response

[VolkerK62]

you must configure the capacity for both batteries

[andig]

As @VolkerK62 said: how should evcc know how big your batteries are if you don't configure it?

[StefanSchoof]

But still a little strange, that the soc sum of the batteries is higher then any of the two batteries.

[andig]

As usual- complete config and log will tell…