Definition of Generic price sensor

template:
  - sensor:
      - name: "my_price_sensor"
        state: 123.45
        attributes:
          prices_today: >
            [
              {
                "time": "2023-12-30 00:00:00+01:00",
                "price": 120.00
              },
              {
                "time": "2023-12-30 01:00:00+01:00",
                "price": 121.00
              },
              ...
              {
                "time": "2023-12-30 23:00:00+01:00",
                "price": 143.00
              }
            ]
          prices_tomorrow: >
            [
              {
                "time": "2023-12-31 00:00:00+01:00",
                "price": 120.00
              },
              {
                "time": "2023-12-31 01:00:00+01:00",
                "price": 121.00
              },
              ...
              {
                "time": "2023-12-31 23:00:00+01:00",
                "price": 143.00
              }
            ]

state shall be the current price and be a float object.

prices_today shall be an array of time/price dictionary. If there is no valid prices today, it shall be an empty array [] or None . An array with 12 or fewer elements is considered to be invalid. The elements in the array shall be sorted by time, with the earliest element first, and only include prices for today.

prices_tomorrow shall be an array of time/price dictionary. If there is no valid prices tomorrow, it shall be an empty array [] or None . An array with 12 or fewer elements is considered to be invalid. The elements in the array shall be sorted by time, with the earliest element first, and only include prices for tomorrow.

The last element in the prices_today array shall have a time that is earlier than the time of the first element in the prices_tomorrow array.

The time element in the time/price dictionary shall be a str object using the ISO 8601 format or a datetime object, and shall represent the local time and include time zone information.

The price element in the time/price dictionary shall be a float object.

NOTE: For a template sensor, it seems not possible to create datetime objects for the time element. For a price sensor provided by an integration, it is recommended to use a datetime objects for the time element.

Also, it is highly recommented to set the configuration variables unique_id, unit_of_measurement, availability, see this example.