Smart EV Charging - Night Tariff Focus.yaml

alias: Smart EV Charging - Night Tariff Focus
description: Adjust EV charging based on house load and night tariff window.
trigger:
  - platform: time_pattern
    minutes: "/3"  # How often to check and adjust charging (every 3 minutes)
condition: []
action:
  - variables:
      current_hour: "{{ now().hour }}"
      # CHANGE THIS: Replace with your actual load/consumption sensor entity
      load_power: "{{ '%.2f' | format(states('sensor.shellyem3_c45bbe6c1698_channel_a_power') | float / 1000) }}"  # CHANGE THIS: Use your total house load sensor entity
      voltage: 230
      max_allowed_amps: 32  # CHANGE THIS: Maximum charging current your setup supports
      min_allowed_amps: 6   # CHANGE THIS: Minimum charging current
      
      # CHANGE THIS: Adjust night tariff hours to match your electricity plan
      # Current setting: 11 PM to 7 AM (23:00 to 07:00)
      is_night_tariff: "{{ current_hour >= 23 or current_hour < 7 }}"
      
      # Logic for determining charging current based on consumption and time
      charge_amps: >
        {% if is_night_tariff %}
          {# During night tariff: always charge at maximum regardless of consumption #}
          {% set target_amps = 32 %}
        {% else %}
          {# During day: adjust charging based on house consumption #}
          {% if load_power > 5 %}
            {% set target_amps = 0 %}
          {% elif load_power < 3.5 %}
            {% set target_amps = 10 %}
          {% else %}
            {% set target_amps = 6 %}
          {% endif %}
        {% endif %}
        {{ [min_allowed_amps, [target_amps, max_allowed_amps] | min] | max if target_amps > 0 else 0 }}

  - choose:
      # START CHARGING: When we want to charge (amps > 0)
      - conditions:
          - condition: template
            value_template: "{{ charge_amps > 0 }}"
        sequence:
          # First, make sure charging is enabled
          - service: select.select_option
            target:
              entity_id: select.ev_charger_toggle_charging  # CHANGE THIS: Your EV charger toggle entity
            data:
              option: "Start charging"  # CHANGE THIS: Exact text for starting charging
          
          # Then set the charging current
          - service: number.set_value
            target:
              entity_id: number.ev_charger_set_charge_current  # CHANGE THIS: Your EV charger current control entity
            data:
              value: "{{ charge_amps }}"

      # STOP CHARGING: When consumption is above 4kW or we don't want to charge
      - conditions:
          - condition: template
            value_template: "{{ charge_amps == 0 }}"
        sequence:
          # Stop charging completely
          - service: select.select_option
            target:
              entity_id: select.ev_charger_toggle_charging  # CHANGE THIS: Your EV charger toggle entity
            data:
              option: "Stop charging"  # CHANGE THIS: Exact text for stopping charging

mode: single