tesla-v2.yaml

###############################################################################
# Disclaimer:
#
# Even though this automation has been created with care, the author cannot be
# responsible for any damages caused by this automation.  Use at your own risk.
#
###############################################################################
# Objective:
# - To charge Tesla car using excess solar and weather forecast.
#
# History:
# 20/6/2023 Inspiration from Alphaemef's Tesla Solar Charger Blueprint 30/4/2023.
###############################################################################

blueprint:

  name: Tesla night charger automation
  description: To charge Tesla car using surplus solar electricity and weather forecast.
  domain: automation

###############################################################################
# Blueprint inputs
###############################################################################
  input:

    #####################################
    # Main configs
    #####################################
    sensor_grid_power_net:
      name: Grid power net
      description: Sensor that express negative power in Watts when exporting to grid and positive power when consuming from grid. This sensor is the feedback loop for adjusting power consumption.
      default: sensor.grid_power_net
      selector:
        entity:
          domain: sensor

    # https://github.com/home-assistant/frontend/issues/12281
    # toggle_charge_from_grid:
    #  name: Charge from Grid Toggle
    #  description: Turn on to charge from grid at constant current.
    #  default: false
    #  selector:
    #    boolean: {}

    toggle_charge_from_grid:
      name: Charge from grid toggle
      description: Toggle on to charge from grid at specified current (Settings > Devices & Services > Helpers > Create helper > Toggle). The default is to charge from solar only.
      #default: input_boolean.telsa_model3_charge_from_grid
      selector:
        entity:
          domain: input_boolean

    grid_target_power_draw:
      name: Charger target power draw when charging from grid
      description: Specify target power draw from grid in watt
      #default: input_boolean.telsa_model3_charge_from_grid
      default: 3500
      selector:
        number:
          min: 0
          max: 7200
          unit_of_measurement: watt
          mode: box

    toggle_stop_charger:
      name: Stop charger toggle
      description: Toggle on to stop charger script (Settings > Devices & Services > Helpers > Create helper > Toggle). Delayed by "Wait grid power net update" value.
      #default: input_boolean.tesla_model3_stop_charging
      selector:
        entity:
          domain: input_boolean

    charger_voltage:
      name: Charger voltage
      description: Specify charger voltage in Volt. In Australia, single phase is 230V, and three phase is 400V due to 120 degree phase angle between phases. This can differ between countries.
      default: 230
      selector:
        number:
          min: 110
          max: 750
          unit_of_measurement: volt
          mode: box

    charger_max_current:
      name: Charger maximum current
      description: Specify charger maximum current in Ampere.
      default: 15
      selector:
        number:
          min: 5
          max: 100
          unit_of_measurement: amp
          mode: box

    charger_min_current:
      name: Charger minimum current
      description: Specify the minimum charging current to keep charging the car when there is no excess solar electricity. The default is 0 Ampere.
      default: 0
      selector:
        number:
          min: 0
          max: 100
          unit_of_measurement: amp
          mode: box

    wait_grid_power_net_update:
      name: Wait grid power net update
      description: Specify in seconds how often to check the "sensor_grid_power_net". The waiting period should be longer than the sensor update interval.
      default: 60
      selector:
        number:
          min: 1
          max: 600
          unit_of_measurement: second
          mode: box

    sunrise_offset_start_trigger:
      name: Sunrise offset start trigger
      description: Specify time to start charging relative to sunrise, eg. set "+00:30:00" without quotes to start 30 minutes after sunrise.
      default: "+00:30:00"

    sunset_offset_end_trigger:
      name: Sunset offset end trigger
      description: Specify time to stop charging relative to sunset, eg. set "-00:30:00" without quotes to end 30 minutes before sunset.
      default: "-00:30:00"

    #####################################
    # Car daily charge limit
    #####################################
    car_charge_limit_monday:
      name: Monday
      description: Car charge limit for day (-1 = Use Tesla app charge limit).
      default: -1
      selector:
        number:
          min: -1
          max: 100
          unit_of_measurement: percent
          mode: slider

    car_charge_limit_tuesday:
      name: Tuesday
      description: Car charge limit for day (-1 = Use Tesla app charge limit).
      default: -1
      selector:
        number:
          min: -1
          max: 100
          unit_of_measurement: percent
          mode: slider

    car_charge_limit_wednesday:
      name: Wednesday
      description: Car charge limit for day (-1 = Use Tesla app charge limit).
      default: -1
      selector:
        number:
          min: -1
          max: 100
          unit_of_measurement: percent
          mode: slider

    car_charge_limit_thursday:
      name: Thursday
      description: Car charge limit for day (-1 = Use Tesla app charge limit).
      default: -1
      selector:
        number:
          min: -1
          max: 100
          unit_of_measurement: percent
          mode: slider

    car_charge_limit_friday:
      name: Friday
      description: Car charge limit for day (-1 = Use Tesla app charge limit).
      default: -1
      selector:
        number:
          min: -1
          max: 100
          unit_of_measurement: percent
          mode: slider

    car_charge_limit_saturday:
      name: Saturday
      description: Car charge limit for day (-1 = Use Tesla app charge limit).
      default: -1
      selector:
        number:
          min: -1
          max: 100
          unit_of_measurement: percent
          mode: slider

    car_charge_limit_sunday:
      name: Sunday
      description: Car charge limit for day (-1 = Use Tesla app charge limit).
      default: -1
      selector:
        number:
          min: -1
          max: 100
          unit_of_measurement: percent
          mode: slider

    #####################################
    # Weather forecast
    #####################################
    charge_car_base_on_weather:
      name: Adjust daily car charge limit based on weather
      description: Automatically adjust to the highest charge limit set within a rainy forecast period. Charge limit and weather provider settings must be configured.
      default: false
      selector:
        boolean:

    weather_provider:
      name: Weather provider
      description: Weather forecast provider, eg. Meteorologisk institutt (Met.no).
      default: weather.forecast_home
      selector:
        entity:
          domain: weather

    forecast_index:
      name: Forecast days
      description: Number of days to forecast weather excluding today.
      default: 2
      selector:
        number:
          min: 0
          max: 6
          mode: slider
          unit_of_measurement: day

    forecast_attribute:
      name: Weather condition field name
      description: Field name for forecast attribute (default="condition"). See https://www.home-assistant.io/integrations/weather/ for details.
      default: "condition"
      selector:
        text:

    car_charge_limit_bad_weather:
      name: Car charge limit on bad weather forecast
      description: Charge limit to set on or before bad weather period. This will be used unless there is a higher setting within the forecast period.
      default: 90
      selector:
        number:
          min: 0
          max: 100
          unit_of_measurement: percent
          mode: slider

    #####################################
    # Home battery config (placeholder only)
    #####################################
    sensor_homebattery_power_net:
      name: Home battery power net
      description: Sensor reporting net battery power in Watts. This works even if no battery is connected, in which case choose any entity with a non-number state.
      default: sensor.shift_state
      selector:
        entity:
          domain: sensor

    sensor_homebattery_level:
      name: Home battery charge level
      description: Sensor reporting home battery charge level in percentage. If there is no homebattery_level entity, choose any entity with a non-number state.
      default: sensor.shift_state
      selector:
        entity:
          domain: sensor

    #####################################
    # Tesla config entities
    #####################################
    car_location_tracker:
      name: Tesla location tracker
      description: The entity that provides the location of car. Important that home location is defined in Home Assistant.
      default: device_tracker.location_tracker
      selector:
        entity:
          domain: device_tracker

    car_button_wake_up:
      name: Tesla button wake up
      description: Button to wake up car.
      default: button.wake_up
      selector:
        entity:
          domain: button

    car_binary_sensor_charger_pluggedin:
      name: Tesla binary sensor charger
      description: Sensor to check if car is plugged in.
      default: binary_sensor.charger
      selector:
        entity:
          domain: binary_sensor

    car_switch_charger:
      name: Tesla switch charger
      description: Switch to turn charger on or off.
      default: switch.charger
      selector:
        entity:
          domain: switch

    car_binary_sensor_charging:
      name: Tesla binary sensor charging
      description: Sensor to check if car is charging.
      default: binary_sensor.charging
      selector:
        entity:
          domain: binary_sensor

    car_number_charging_amps:
      name: Tesla charging amps
      description: Entity to control current in Ampere used to charge the car battery. This is the main parameter used to adjust electricity consumption.
      default: number.charging_amps
      selector:
        entity:
          domain: number

    car_number_charge_limit:
      name: Tesla charge limit
      description: Entity to control car battery charge limit in percentage (100% = fully charged).
      default: number.charge_limit
      selector:
        entity:
          domain: number

    car_sensor_battery:
      name: Tesla sensor battery
      description: Sensor that reports current battery charge level.
      default: sensor.battery
      selector:
        entity:
          domain: sensor

    car_button_forceupdate_ha:
      name: Tesla button force update Home Assistant
      description: Button to force update sensors in Home Assistant with values from car.
      default: button.force_data_update
      selector:
        entity:
          domain: button

###############################################################################
# Global variables
# https://community.home-assistant.io/t/why-the-heck-dont-we-have-global-variables/219671/86
# https://github.com/rogro82/hass-variables
###############################################################################
variables:

  #####################################
  # Constants
  #####################################
  # Tesla UMC charger initial minimum charging current is 5A, after that it can vary between 0A and 15A.
  initial_charge_current: 6
  #max_allowable_current_delta: 6

  # Time to wait in seconds for car to wake up.
  wait_car_wakeup: 40

  # Time to wait in seconds to turn charger on or off.
  # To switch on charger from 2V to 230V and then ram up current, it took 16 seconds for initial_charge_current 15A.
  #wait_charger_on: 16
  # To switch on charger from 2V to 230V and then ram up current, it took 11 seconds for initial_charge_current 6A.
  wait_charger_on: 11
  wait_charger_off: 5

  # Time to wait in seconds for current to change after sending command.
  #wait_current_change: "00:00:0.3"
  wait_current_change: 0.3

  # Time to wait in seconds for command to execute after sending command.
  wait_command_execute: 5
  #wait_command_execute_str: "00:00:{{ wait_command_execute }}"

  # "Skew_default" defines the right / left skew of the import/export curve. I.e a skew of 0.0 will increase current draw
  # as soon as power to grid turns negative, and reduces current when power goes higher than 230W.
  # i.e it will aim at power draw in the range [0-230W[. A skew of -1 will aim at a power from grid of [-230;0[
  # Should be kept between -1 and 0.
  skew_default: -0.3

  #####################################
  # Inputs
  #####################################
  charge_from_grid: !input toggle_charge_from_grid
  stop_charger: !input toggle_stop_charger
  car_charger_voltage: !input charger_voltage
  car_charger_max_current: !input charger_max_current
  car_charger_min_current: !input charger_min_current
  grid_target_power_draw: !input grid_target_power_draw

  # Power = Voltage * Current
  # The power step in watts to increase or decrease with 1A current change.
  one_amp_watt_step: "{{ car_charger_voltage * 1 }}"

  # This worked ok.
  #tesla_model3_charge_level: "sensor.battery"
  #tesla_model3_charge_level: !input car_sensor_battery
  car_chargelimit_ent: !input car_number_charge_limit
  car_chargelimit_last: '{{ expand(car_chargelimit_ent)[0].last_changed | as_timestamp }}'
  car_chargelimit_val: '{{ expand(car_chargelimit_ent)[0].state }}'
  car_batterylevel_ent: !input car_sensor_battery
  car_batterylevel_last: '{{ expand(car_batterylevel_ent)[0].last_changed | as_timestamp }}'
  car_batterylevel_val: '{{ expand(car_batterylevel_ent)[0].state }}'

  car_charging_amps: !input car_number_charging_amps

  #####################################
  # Set car charge limit based on which week day
  #####################################
  mon: !input car_charge_limit_monday
  tue: !input car_charge_limit_tuesday
  wed: !input car_charge_limit_wednesday
  thu: !input car_charge_limit_thursday
  fri: !input car_charge_limit_friday
  sat: !input car_charge_limit_saturday
  sun: !input car_charge_limit_sunday
  
  # Store as integer list
  car_charge_limit_list: '{{ [mon, tue, wed, thu, fri, sat, sun] }}'
  todayIndex: '{{ now().weekday() }}'
  todayChargeLimit: '{{ car_charge_limit_list[todayIndex] }}'

  #####################################
  # Set car charge limit based on weather forecast
  #####################################
  charge_car_base_on_weather: !input charge_car_base_on_weather
  weather_provider: !input weather_provider
  forecast_index: !input forecast_index
  forecast_attribute: !input forecast_attribute
  carChargeLimitBadWeather: !input car_charge_limit_bad_weather

  # Not all intervals are available for all providers. Possible values: "hourly", "twice_daily", "daily"
  forecast_interval: "daily"
  # Charge limit list for the next N days excluding today. Also take into account carChargeLimitBadWeather.
  periodChargeLimitList: >
    {% set data = namespace(numbers=[carChargeLimitBadWeather]) %}
    {% for i in range(1, forecast_index + 1, 1) %}
      {% set day = (todayIndex + i) % 7 %}
      {% set data.numbers = data.numbers + [car_charge_limit_list[day]] %}
    {% endfor %}
    {{ data.numbers }}
  periodMaxChargeLimit: '{{ periodChargeLimitList | max }}'

###############################################################################
# Triggers
# Note:
# - Tesla triggers do not update often due to infrequent polling.
###############################################################################
trigger:
  #- platform: numeric_state
  #  entity_id: !input sensor_grid_power_net
  #  below: 300

  #- platform: numeric_state
  #  entity_id: !input sensor_grid_power_net
  #  below: 0

  # Trigger action if just plugged in.
  - platform: state
    entity_id:
      - !input car_binary_sensor_charger_pluggedin
    to: "on"

  # Disabled this trigger to allow off-peak night time charging.
  # Trigger action if already charging.
  #- platform: state
  #  entity_id: !input car_binary_sensor_charging
  #  to: "on"

condition:

  - condition: state
    entity_id: !input car_location_tracker
    state: home

  - condition: state
    entity_id: !input car_binary_sensor_charger_pluggedin
    state: "on"

###############################################################################
# Action
###############################################################################
action:

  # Wake up Tesla.
  - service: button.press
    data: {}
    target:
      entity_id: !input car_button_wake_up
  - delay: "{{ wait_car_wakeup }}"

  # Get the latest data from Tesla to update HA.
  - service: button.press
    data: {}
    target:
      entity_id: !input car_button_forceupdate_ha
  - delay: "{{ wait_command_execute }}"

  # Save current Tesla parameters for later restore.
  - service: scene.create
    data:
      scene_id: tesla_solar_charger_script_scene
      snapshot_entities:
        - !input car_number_charge_limit
        - !input car_number_charging_amps
  - delay: "{{ wait_command_execute }}"

  # Should honour existing charge limit set by app or car, unless charge limit for day is set.
  # If charge limit for day is not set, ie. set to -1, charge limit will be set according to the Tesla app.
  # If charge limit for day is set and charge car based on weather is disabled, charge limit will be set according to the limit configured for the day.
  # If charge limit for day is set and charge car based on weather is enabled, charge limit will be adjusted to the highest limit set within the rainy forecast period taking into account the car charge limit on bad weather setting.
  # If charge car based on weather is enabled, charge limit and weather provider settings must be configured.
  - choose:
    - conditions: >
        {{ todayChargeLimit >= 0 and todayChargeLimit <= 100 }}
      sequence:
        - choose:
          - conditions: >
              {{ charge_car_base_on_weather }}
            sequence:
              # Get weather forecast data
              - service: weather.get_forecasts
                target:
                  entity_id: !input weather_provider
                data:
                  type: "{{forecast_interval}}"
                response_variable: weather_forecast

              - variables:
                  periodForecastList: >
                    {% set data = namespace(strings=[]) %}
                    {% for day in range(1, forecast_index + 1, 1) %}
                      {% set data.strings = data.strings + [weather_forecast[weather_provider]['forecast'][day][forecast_attribute]] %}
                    {% endfor %}
                    {{ data.strings }}

                  # See https://www.home-assistant.io/integrations/weather/
                  # Some possible values: rainy, cloudy, partlycloudy
                  finalChargeLimit: >-
                    {% if 'rainy' in periodForecastList and periodMaxChargeLimit > todayChargeLimit %}
                      {{ periodMaxChargeLimit }}
                    {% else %}
                      {{ todayChargeLimit }} 
                    {% endif %}

              # Show current status
              - service: system_log.write
                data_template:
                  message: |-
                    {{now()}}: 
                    finalChargeLimit={{finalChargeLimit}}, todayChargeLimit={{todayChargeLimit}}, carChargeLimitBadWeather={{carChargeLimitBadWeather}}, periodMaxChargeLimit={{periodMaxChargeLimit}},
                    periodChargeLimitList={{periodChargeLimitList}}, periodForecastList={{periodForecastList}},
                    todayIndex={{todayIndex}}, car_charge_limit_list={{car_charge_limit_list}}, weather_today={{ weather_forecast[weather_provider]['forecast'][0][forecast_attribute] }}
                  #level: warning
                  level: info

              - service: number.set_value
                data:
                  value: "{{ finalChargeLimit }}"
                target:
                  entity_id: !input car_number_charge_limit
              - delay: "{{ wait_command_execute }}"

          default:
            - service: number.set_value
              data:
                value: "{{ todayChargeLimit }}"
              target:
                entity_id: !input car_number_charge_limit
            - delay: "{{ wait_command_execute }}"

  #####################################
  # Main while loop
  #####################################
  - repeat:

      # Only start charging when following conditions are met, otherwise exit script.
      while:
        - condition: and
          conditions:

            # Continue if stop button has not been recently pressed.
            # https://community.home-assistant.io/t/repeat-until-input-button-is-pressed/429300
            # input_button is a state with timestamp of button-press event.
            # https://community.home-assistant.io/t/strptime-vs-as-datetime/381500/6
            # Got follow error if button was newly created and was never pressed before. Work-around is just to press button once or set default(0, true).
            # Error: In 'template' condition: TypeError: unsupported operand type(s) for -: 'datetime.datetime' and 'NoneType'
            #- condition: template
            #  value_template: "{{ now() - (states(stop_charger_button_press) | default(0, true) | as_datetime) > timedelta(seconds=(wait_command_execute * 3 + loop_wait_time)) }}"

            # Continue if stop button is toggled off.
            - condition: template
              value_template: "{{ is_state(stop_charger, 'off') }}"

            # Continue if charger is plugged in.
            - condition: state
              entity_id: !input car_binary_sensor_charger_pluggedin
              state: "on"

            # Continue if battery is more than 1% below charge limit.
            # https://community.home-assistant.io/t/configuring-variables-into-templates-in-a-blueprint/323811/2
            # OK to charge 1% less because Tesla can stop charging at 1% less by itself.
            #- condition: template
            #  value_template: "{{ (expand(car_batterylevel_ent)[0].state | int + 1) < (expand(car_chargelimit_ent)[0].state | int) }}"

            # Continue if battery is below charge limit.
            # https://community.home-assistant.io/t/configuring-variables-into-templates-in-a-blueprint/323811/2
            - condition: template
              value_template: "{{ (expand(car_batterylevel_ent)[0].state | int) < (expand(car_chargelimit_ent)[0].state | int) }}"

            - condition: template
              value_template: "{{ is_state(charge_from_grid, 'on') }}"

      sequence:

        - variables:
            # For Enphase, grid_power_net is an integer in watts. Positive value means importing power from grid. Negative value means exporting power to grid.
            grid_power_net: !input sensor_grid_power_net

            skew: >-
              {% if skew_default <= -1 %}
                {{ skew_default }}
              {% else %}
                {{ skew_default }} 
              {% endif %}

        - variables:

            # Net power from all sources (default 0 set by float(0) if cannot convert to float).
            all_power_net: "{{ states(grid_power_net) | float(0) }}"

            # This can be greater than car_charger_max_current.
            # +ve => importing amp from grid, -ve => exporting amp to grid
            all_current_net: "{{ (all_power_net / one_amp_watt_step) | float }}"

            target_current_net: "{{ (grid_target_power_draw / one_amp_watt_step) | float }}"

            # Charge current for this sequence run, including sanity check to ensure within limits.
            charge_current: >-
              {% if states(car_charging_amps) | int < 0 %}
                {{ 0 }}
              {% elif states(car_charging_amps) | int > car_charger_max_current %}
                {{ car_charger_max_current }}
              {% else %}
                {{ states(car_charging_amps) | int }}
              {% endif %}

            target_current_charge: "{{ target_current_net - (all_current_net - charge_current) | float }}"

            # If importing from grid, will try to decrease charge current by same consumption or min charger current.
            # If exporting to grid, will try to increase charge current by same production or max charger current.
            #propose_charge_current: >-
            new_charge_current: >-
              {% if target_current_charge > car_charger_min_current %}
                {{ [car_charger_max_current, target_current_charge] | min | round(0) }}
              {% else %}
                {{ [car_charger_min_current, target_current_charge] | max | round(0) }}
              {% endif %}

        - choose:

          # First time run, turn on charger if not turned on already.
          - conditions:
              - condition: template
                value_template: "{{ repeat.index == 1 }}"
            sequence:

              - choose:
                - conditions:
                    - condition: state
                      entity_id: !input car_binary_sensor_charging
                      state: "off"
                  sequence:
                    # Only set initial current if charging from solar, otherwise charge from grid using current set by user enforcing current limits.
                    - if:
                        - condition: template
                          value_template: "{{ is_state(charge_from_grid, 'off') }}"
                      then:
                        - service: number.set_value
                          data:
                            value: "{{ initial_charge_current }}"
                          target:
                            entity_id: !input car_number_charging_amps
                      else:
                        - service: number.set_value
                          data:
                            value: "{{ charge_current }}"
                          target:
                            entity_id: !input car_number_charging_amps
                    - delay: "{{ wait_command_execute }}"

                    # Turn on charger. Rate of current increase is handled by Tesla car.
                    - service: switch.turn_on
                      data: {}
                      target:
                        entity_id: !input car_switch_charger
                    - delay: "{{ wait_charger_on }}"
          
          # Exit script if charger is turned off, ie. not charging.
          - conditions:
              - condition: state
                entity_id: !input car_binary_sensor_charging
                state: "off"
            sequence:
              # Restore previous settings.
              - service: scene.turn_on
                target:
                  entity_id: scene.tesla_solar_charger_script_scene
              - delay: "{{ wait_command_execute }}"

              # Get the latest data from Tesla to update HA before exiting script.
              - service: button.press
                data: {}
                target:
                  entity_id: !input car_button_forceupdate_ha
              - delay: "{{ wait_command_execute }}"

              - stop: "Exiting script due to charger turned off manually or automatically by car when charge limit reached."
                # https://www.home-assistant.io/docs/scripts/#stopping-a-script-sequence
                # Cannot get response_variable to work. Needs to be key/value pair?
                #response_variable: "stop_charging_reason"

          # Toggled to charge from grid at current specified in app.
          - conditions:
              - condition: template
                value_template: "{{ is_state(charge_from_grid, 'on') }}"
            sequence:
              - delay: "00:00:00"

          # all_power_net < -69W, ie. need to increase charger current.
          - conditions:
              - condition: template
                value_template: "{{ all_power_net > (0 + skew) * one_amp_watt_step }}"
            sequence:
              # Gradually increase current with 1A step.
              - repeat:
                  while: "{{ (charge_current + repeat.index) <= new_charge_current }}"
                  sequence:
                    - service: number.set_value
                      data_template:
                        value: "{{ charge_current + repeat.index }}"
                      target:
                        entity_id: !input car_number_charging_amps
                    - delay: "{{ wait_current_change }}"

          # all_power_net >= 161W, ie. need to decrease charger current.
          - conditions:
              - condition: template
                value_template: "{{ all_power_net >= (1 + skew) * one_amp_watt_step }}"
            sequence:
              # Gradually decrease current with 1A step.
              - repeat:
                  while: "{{ (charge_current - repeat.index) >= new_charge_current }}"
                  sequence:
                    - service: number.set_value
                      data_template:
                        value: "{{ charge_current - repeat.index }}"
                      target:
                        entity_id: !input car_number_charging_amps
                    - delay: "{{ wait_current_change }}"

          # 161 > all_power_net >= -69W, ie. do nothing.
          - conditions:
              - condition: template
                value_template: "{{ (1 + skew) * one_amp_watt_step > all_power_net >= (0 + skew) * one_amp_watt_step }}"
            sequence:
              - delay: "00:00:00"


        # Get the latest data from Tesla to update HA.
        - service: button.press
          data: {}
          target:
            entity_id: !input car_button_forceupdate_ha
        - delay: "{{ wait_command_execute }}"

        # Sleep to ensure HA is updated before the next read.
        - delay:
            hours: 0
            minutes: 0
            seconds: !input wait_grid_power_net_update
            milliseconds: 0

  #####################################
  # Exit script
  #####################################
  - if:
      - condition: state
        entity_id: !input car_binary_sensor_charging
        state: "on"
    then:
      # Gradually decrease to 0A with 1A step, otherwise Tesla car can decrease current from 15A -> 7A -> 0A in 1 second.
      - variables:
          charge_current: "{{ states(car_charging_amps) | int }}"
      - repeat:
          while: "{{ (charge_current - repeat.index) >= 0 }}"
          sequence:
            - service: number.set_value
              data_template:
                value: "{{ charge_current - repeat.index }}"
              target:
                entity_id: !input car_number_charging_amps
            - delay: "{{ wait_current_change }}"
      - delay: "{{ wait_command_execute }}"

      # Turn off charger.
      - service: switch.turn_off
        data: {}
        target:
          entity_id: !input car_switch_charger
      - delay: "{{ wait_charger_off }}"

  # Restore previous settings.
  - service: scene.turn_on
    target:
      entity_id: scene.tesla_solar_charger_script_scene
  - delay: "{{ wait_command_execute }}"

  # Get the latest data from Tesla to update HA before exiting script.
  - service: button.press
    data: {}
    target:
      entity_id: !input car_button_forceupdate_ha
  - delay: "{{ wait_command_execute }}"

mode: single