toggle charger

automation:
  - alias: S21U toggle charger
    trigger:
      - platform: state
        entity_id: sensor.s21u_battery_level
      - platform: homeassistant
        event: start
    condition: "{{states('sensor.s21u_battery_level')|int(0)<=20 or states('sensor.s21u_battery_level')|int(0) >= 80}}"
    action:
      service: "switch.turn_{{'off' if states('sensor.s21u_battery_level')|int(0)>=80 else 'on'}}"
      entity_id: switch.s21u_charger