Find cheapest and most expensive electricity hours in Home Assistant to charge your EV or Battery Storage System (BESS)

template.yaml

template:
  - sensor:
    - unique_id: 979e14f2-78f9-43bc-9fb9-47e0645419f4
      name: Tesla Model Y Hours to finish charging
      device_class: duration
      unit_of_measurement: h
      state: >
        {% set current_battery_soc = states('sensor.tesla_model_y_battery') | int -%}
        {% set desired_battery_soc = states('number.tesla_model_y_charge_limit_2') | int -%}
        {% set battery_percent_to_charge = [((desired_battery_soc - current_battery_soc)/100),0]|max -%}
        {% set battery_capacity_in_kwh = 75 -%}
        {% set battery_energy_to_add = battery_percent_to_charge * battery_capacity_in_kwh -%}
        {% set charging_phases = 3|int -%}
        {% set charging_voltage = 230|int -%}
        {% set charging_amps = states('number.tesla_model_y_charging_amps')|float(default=16) -%}
        {% set charging_power = (charging_phases*charging_voltage*charging_amps)/1000 -%}
        {% set charging_hours = battery_energy_to_add/charging_power -%}
        {% set charging_time_left_reported_by_tesla = states('sensor.tesla_model_y_estimated_hours_to_charge_termination')|float(default=0.0) -%}

        {% if charging_time_left_reported_by_tesla is not none and charging_time_left_reported_by_tesla > 0 %}
          {{ charging_time_left_reported_by_tesla }}
        {% else %}
          {{ charging_hours }}
        {% endif %}
      availability: >
        {{
          states('sensor.tesla_model_y_battery') | is_number
          and states('number.tesla_model_y_charge_limit_2') | is_number
        }}
      attributes:
        source: >
          {% set charging_time_left_reported_by_tesla = states('sensor.tesla_model_y_estimated_hours_to_charge_termination')|float -%}
          {% if charging_time_left_reported_by_tesla is not none and charging_time_left_reported_by_tesla > 0 %}
            Provided by Tesla
          {% else %}
            Our own calculations
          {% endif %}
  - binary_sensor:
    - unique_id: 911f0a21-48de-438f-90a2-4b46401268b3
      name: Tesla Model Y Charge Car Cheap
      device_class: battery_charging
      state: >
        {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
        {% set sensor = 'sensor.tge_fixing_1_rate' -%}
        {% set start = now() -%}
        {% set end = states('input_datetime.tesla_model_y_finish_charging_at') -%}
        {% set hours = states('sensor.tesla_model_y_hours_to_finish_charging') -%}
        {{
          cheapest_energy_hours(
            sensor=sensor,
            attr_today='prices_today',
            attr_tomorrow='prices_tomorrow',
            time_key='time',
            value_key='price',
            start=start,
            end=end,
            include_tomorrow=true,
            hours=hours,
            split=true,
            mode='is_now'
          )
        }}
      availability: >
        {{
          states('sensor.tesla_model_y_charging_time_left') | is_number
          and states('sensor.tesla_model_y_battery') | is_number
          and states('number.tesla_model_y_charge_limit_2') | is_number
          and states('number.tesla_model_y_charging_amps') | is_number
          and states('sensor.tge_fixing_1_rate') | is_number
        }}
      attributes:
        start: "{{ now() }}"
        end: "{{ states('input_datetime.tesla_model_y_finish_charging_at') }}"
        hours: "{{states('sensor.tesla_model_y_hours_to_finish_charging')}}"
        debug: >
          {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
          {% set sensor = 'sensor.tge_fixing_1_rate' -%}
          {% set start = now() -%}
          {% set end = states('input_datetime.tesla_model_y_finish_charging_at') -%}
          {% set hours = states('sensor.tesla_model_y_hours_to_finish_charging') -%}
          {{
            cheapest_energy_hours(
              sensor=sensor,
              attr_today='prices_today',
              attr_tomorrow='prices_tomorrow',
              time_key='time',
              value_key='price',
              start=start,
              end=end,
              include_tomorrow=true,
              hours=hours,
              split=true,
              mode='all'
            )
          }}
    - unique_id: phahw3ra8aiShohphaibiegee9ahf6Cu
      name: 4 cheapest consecutive hours
      device_class: battery_charging
      state: >
        {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
        {% set sensor = 'sensor.tge_fixing_1_rate' -%}
        {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
        {% set end = states('input_datetime.find_cheapest_hours_until') -%}
        {% set hours = 4 -%}
        {{
          cheapest_energy_hours(
            sensor=sensor,
            attr_today='prices_today',
            attr_tomorrow='prices_tomorrow',
            time_key='time',
            value_key='price',
            start=start,
            end=end,
            include_tomorrow=true,
            hours=hours,
            split=false,
            mode='is_now'
          )
        }}
      availability: >
        {{
          (states('sensor.tge_fixing_1_rate') | is_number)
        }}
      attributes:
        start: "{{ states('input_datetime.find_cheapest_most_expensive_hours_since') }}"
        end: "{{ states('input_datetime.find_cheapest_hours_until') }}"
        hours: "4"
        debug: >
          {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
          {% set sensor = 'sensor.tge_fixing_1_rate' -%}
          {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
          {% set end = states('input_datetime.find_cheapest_hours_until') -%}
          {% set hours = 4 -%}
          {{
            cheapest_energy_hours(
              sensor=sensor,
              attr_today='prices_today',
              attr_tomorrow='prices_tomorrow',
              time_key='time',
              value_key='price',
              start=start,
              end=end,
              include_tomorrow=true,
              hours=hours,
              split=false,
              mode='all'
            )
          }}
    - unique_id: Aesouthaico3ic7oowa4agahiJeeghoo
      name: 4 cheapest non-consecutive hours
      device_class: battery_charging
      state: >
        {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
        {% set sensor = 'sensor.tge_fixing_1_rate' -%}
        {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
        {% set end = states('input_datetime.find_cheapest_hours_until') -%}
        {% set hours = 4 -%}
        {{
          cheapest_energy_hours(
            sensor=sensor,
            attr_today='prices_today',
            attr_tomorrow='prices_tomorrow',
            time_key='time',
            value_key='price',
            start=start,
            end=end,
            include_tomorrow=true,
            hours=hours,
            split=true,
            mode='is_now'
          )
        }}
      availability: >
        {{
          (states('sensor.tge_fixing_1_rate') | is_number)
        }}
      attributes:
        start: "{{ states('input_datetime.find_cheapest_most_expensive_hours_since') }}"
        end: "{{ states('input_datetime.find_cheapest_hours_until') }}"
        hours: "4"
        debug: >
          {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
          {% set sensor = 'sensor.tge_fixing_1_rate' -%}
          {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
          {% set end = states('input_datetime.find_cheapest_hours_until') -%}
          {% set hours = 4 -%}
          {{
            cheapest_energy_hours(
              sensor=sensor,
              attr_today='prices_today',
              attr_tomorrow='prices_tomorrow',
              time_key='time',
              value_key='price',
              start=start,
              end=end,
              include_tomorrow=true,
              hours=hours,
              split=true,
              mode='all'
            )
          }}
    - unique_id: yaesat9Phai3wu4eishuThofietoo8Sh
      name: 4 most expensive consecutive hours
      device_class: battery_charging
      state: >
        {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
        {% set sensor = 'sensor.tge_fixing_1_rate' -%}
        {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
        {% set end = states('input_datetime.find_cheapest_hours_until') -%}
        {% set hours = 4 -%}
        {{
          cheapest_energy_hours(
            sensor=sensor,
            attr_today='prices_today',
            attr_tomorrow='prices_tomorrow',
            time_key='time',
            value_key='price',
            start=start,
            end=end,
            include_tomorrow=true,
            hours=hours,
            split=false,
            lowest=false,
            mode='is_now'
          )
        }}
      availability: >
        {{
          (states('sensor.tge_fixing_1_rate') | is_number)
        }}
      attributes:
        start: "{{ states('input_datetime.find_cheapest_most_expensive_hours_since') }}"
        end: "{{ states('input_datetime.find_cheapest_hours_until') }}"
        hours: "4"
        debug: >
          {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
          {% set sensor = 'sensor.tge_fixing_1_rate' -%}
          {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
          {% set end = states('input_datetime.find_cheapest_hours_until') -%}
          {% set hours = 4 -%}
          {{
            cheapest_energy_hours(
              sensor=sensor,
              attr_today='prices_today',
              attr_tomorrow='prices_tomorrow',
              time_key='time',
              value_key='price',
              start=start,
              end=end,
              include_tomorrow=true,
              hours=hours,
              split=false,
              lowest=false,
              mode='all'
            )
          }}
    - unique_id: fuecooPhaizavoh0ShooSeequu8echee
      name: 4 most expensive non-consecutive hours
      device_class: battery_charging
      state: >
        {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
        {% set sensor = 'sensor.tge_fixing_1_rate' -%}
        {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
        {% set end = states('input_datetime.find_cheapest_hours_until') -%}
        {% set hours = 4 -%}
        {{
          cheapest_energy_hours(
            sensor=sensor,
            attr_today='prices_today',
            attr_tomorrow='prices_tomorrow',
            time_key='time',
            value_key='price',
            start=start,
            end=end,
            include_tomorrow=true,
            hours=hours,
            split=true,
            lowest=false,
            mode='is_now'
          )
        }}
      availability: >
        {{
          (states('sensor.tge_fixing_1_rate') | is_number)
        }}
      attributes:
        start: "{{ states('input_datetime.find_cheapest_most_expensive_hours_since') }}"
        end: "{{ states('input_datetime.find_cheapest_hours_until') }}"
        hours: "4"
        debug: >
          {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
          {% set sensor = 'sensor.tge_fixing_1_rate' -%}
          {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
          {% set end = states('input_datetime.find_cheapest_hours_until') -%}
          {% set hours = 4 -%}
          {{
            cheapest_energy_hours(
              sensor=sensor,
              attr_today='prices_today',
              attr_tomorrow='prices_tomorrow',
              time_key='time',
              value_key='price',
              start=start,
              end=end,
              include_tomorrow=true,
              hours=hours,
              split=true,
              lowest=false,
              mode='all'
            )
          }}
    - unique_id: pa1ueCh3neiTahkad0Ohch8eipet4sew
      name: 2 most expensive consecutive hours
      device_class: battery_charging
      state: >
        {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
        {% set sensor = 'sensor.tge_fixing_1_rate' -%}
        {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
        {% set end = states('input_datetime.find_cheapest_hours_until') -%}
        {% set hours = 2 -%}
        {{
          cheapest_energy_hours(
            sensor=sensor,
            attr_today='prices_today',
            attr_tomorrow='prices_tomorrow',
            time_key='time',
            value_key='price',
            start=start,
            end=end,
            include_tomorrow=true,
            hours=hours,
            split=false,
            lowest=false,
            mode='is_now'
          )
        }}
      availability: >
        {{
          (states('sensor.tge_fixing_1_rate') | is_number)
        }}
      attributes:
        start: "{{ states('input_datetime.find_cheapest_most_expensive_hours_since') }}"
        end: "{{ states('input_datetime.find_cheapest_hours_until') }}"
        hours: "2"
        debug: >
          {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
          {% set sensor = 'sensor.tge_fixing_1_rate' -%}
          {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
          {% set end = states('input_datetime.find_cheapest_hours_until') -%}
          {% set hours = 2 -%}
          {{
            cheapest_energy_hours(
              sensor=sensor,
              attr_today='prices_today',
              attr_tomorrow='prices_tomorrow',
              time_key='time',
              value_key='price',
              start=start,
              end=end,
              include_tomorrow=true,
              hours=hours,
              split=false,
              lowest=false,
              mode='all'
            )
          }}
    - unique_id: aeFee0uiM2De1ohquo1eicojiZiekaik
      name: 1 most expensive consecutive hour
      device_class: battery_charging
      state: >
        {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
        {% set sensor = 'sensor.tge_fixing_1_rate' -%}
        {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
        {% set end = states('input_datetime.find_cheapest_hours_until') -%}
        {% set hours = 1 -%}
        {{
          cheapest_energy_hours(
            sensor=sensor,
            attr_today='prices_today',
            attr_tomorrow='prices_tomorrow',
            time_key='time',
            value_key='price',
            start=start,
            end=end,
            include_tomorrow=true,
            hours=hours,
            split=false,
            lowest=false,
            mode='is_now'
          )
        }}
      availability: >
        {{
          (states('sensor.tge_fixing_1_rate') | is_number)
        }}
      attributes:
        start: "{{ states('input_datetime.find_cheapest_most_expensive_hours_since') }}"
        end: "{{ states('input_datetime.find_cheapest_hours_until') }}"
        hours: "1"
        debug: >
          {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
          {% set sensor = 'sensor.tge_fixing_1_rate' -%}
          {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
          {% set end = states('input_datetime.find_cheapest_hours_until') -%}
          {% set hours = 1 -%}
          {{
            cheapest_energy_hours(
              sensor=sensor,
              attr_today='prices_today',
              attr_tomorrow='prices_tomorrow',
              time_key='time',
              value_key='price',
              start=start,
              end=end,
              include_tomorrow=true,
              hours=hours,
              split=false,
              lowest=false,
              mode='all'
            )
          }}
    - unique_id: queevivi4ooleeshu3aekaireeCeeng3
      name: 2 cheapest consecutive hours
      device_class: battery_charging
      state: >
        {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
        {% set sensor = 'sensor.tge_fixing_1_rate' -%}
        {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
        {% set end = states('input_datetime.find_cheapest_hours_until') -%}
        {% set hours = 2 -%}
        {{
          cheapest_energy_hours(
            sensor=sensor,
            attr_today='prices_today',
            attr_tomorrow='prices_tomorrow',
            time_key='time',
            value_key='price',
            start=start,
            end=end,
            include_tomorrow=true,
            hours=hours,
            split=false,
            mode='is_now'
          )
        }}
      availability: >
        {{
          (states('sensor.tge_fixing_1_rate') | is_number)
        }}
      attributes:
        start: "{{ states('input_datetime.find_cheapest_most_expensive_hours_since') }}"
        end: "{{ states('input_datetime.find_cheapest_hours_until') }}"
        hours: "2"
        debug: >
          {% from 'cheapest_energy_hours.jinja' import cheapest_energy_hours -%}
          {% set sensor = 'sensor.tge_fixing_1_rate' -%}
          {% set start = states('input_datetime.find_cheapest_most_expensive_hours_since') -%}
          {% set end = states('input_datetime.find_cheapest_hours_until') -%}
          {% set hours = 2 -%}
          {{
            cheapest_energy_hours(
              sensor=sensor,
              attr_today='prices_today',
              attr_tomorrow='prices_tomorrow',
              time_key='time',
              value_key='price',
              start=start,
              end=end,
              include_tomorrow=true,
              hours=hours,
              split=false,
              mode='all'
            )
          }}