Suggestion: Separate sensors for phase load about ha-ferroamp HOT 3 CLOSED

{{state_attr('sensor.ferroamp_grid_current','L1')}}
{{state_attr('sensor.ferroamp_grid_current','L2')}}
{{state_attr('sensor.ferroamp_grid_current','L3')}}

  - platform: mqtt
    state_topic: "extapi/data/ehub"
    unique_id: "ehub/pext"
    name: "Realtime Grid Power"
    unit_of_measurement: "kW"
    value_template: "{{ ((((value_json.pext.L1) | int + (value_json.pext.L2) | int + (value_json.pext.L3) | int)) / 1000) | round(2) }}"

  - platform: template
    sensors:
      available_grid_load:
        value_template: "{{(230*3*16/1000 - (states.sensor.Realtime_Grid_Power.state | float)) | int}}"
        friendly_name: "Available Grid Load"
        unit_of_measurement: "kW"

- platform: template
    sensors:
      grid_overload:
        friendly_name: "Grid Overload"
        #delay_off:
        #  minutes: 5
        delay_on:
          minutes: 5
        value_template: >-
          {{ states('sensor.ferroamp_grid_power') | int < -11040 }}

- id: '123456789'
  alias: Grid Overload
  description: ''
  trigger:
  - platform: state
    entity_id: binary_sensor.grid_overload
    from: 'off'
    to: 'on'
  condition: []
  action:
  - service: notify.tibber
    data:
      message: Grid - Overload
      title: Grid Overload
  mode: single