Custom sensor won't get recognized

Configuration
,
1

Hi community,
I’m trying to create a custom sensor for my solar rectifier so that it shows “0” Watts during the night when the rectifier is in a not available state.

sensor:
  - platform: template
    sensors:
      pv_leistung_korrigiert:
        friendly_name: "PV Leistung (Korrigiert)"
        unique_id: "pv_leistung_korrigiert"
        unit_of_measurement: "W"
        device_class: power
        value_template: >-
          {% if states('sensor.solar_gesamtleistung') in ['unknown', 'unavailable', 'none'] %}
            0
          {% else %}
            {{ states('sensor.solar_gesamtleistung') | float }}
          {% endif %}

Config check is fine. Nevertheless, the sensor “pv_leistung_korrigiert” is not available when I try to add it to my dashboard as an entity.
What am I missing here?

Thanks for any help

2

Checked the logs for errors?

You should not use the legacy sensor configuration format.
Rewrite the sensor to use the modern format.

3

logs are good.
I rewrote it like this:

template:
  - sensor:
      - name: "PV Leistung (Korrigiert)"
        unique_id: "pv_leistung_korrigiert"
        unit_of_measurement: "W"
        device_class: power
        state_class: measurement
        state: >
          {% set value = states('sensor.solar_gesamtleistung') %}
          {% if value in ['unknown', 'unavailable', 'none'] %}
            0
          {% else %}
            {{ value | float(0) | int }}
          {% endif %}

which works fine.
Thanks for getting back!