HomeMatic Weatherstation (HmIP-SWO-PL) - No Voltage Info

Hello!

i am working on my battery status card. I am getting all the voltage information from my homematic devices, except from my weather station. the attribute says: “voltage: false”.

What info can i provide to help?

HA:
Home Assistant 2022.8.5
Supervisor 2022.08.3
Operating System 8.4
Frontend 20220802.0 - latest

CCU3:
HmIP-SWO-PL 1.0.18

Binding:

  interfaces:
    rf:
      host: 192.168.178.21
      resolvenames: "json"
      username: "Admin"
      password: "XXX"
    wired:
      host: 192.168.178.21
      port: 2000
      resolvenames: "json"
      username: "Admin"
      password: "XXX"
    ip:
      host: 192.168.178.21
      port: 2010
    groups:
      host: 192.168.178.21
      port: 9292
      resolvenames: "json"
      username: "Admin"
      password: "XXX"
      path: /groups
  hosts:
    ccu3:
      host: 192.168.178.21
      port: 2001
      username: "Admin"
      password: "XXX"