AC estimated power consumption

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Hi all.
Living in South Brazil, I’m experiencing a very warm summer, which means that I’m using my ACs a lot. That also means that my electric bill is getting very expensive.
To avoid surprises on the bill, I created a few sensors to estimate the cost of each AC unit.

# The power consumption for the bill is always measured around the 5th, so we need to use the lastest 5th as a start date
sensor:
  - platform: history_stats
    name: Livingroom AC Cooling
    entity_id: climate.livingroom_ac
    state: 'cool'
    type: time
    end: '{{ now() }}'
    start: '{{ as_timestamp(now().replace(day=5).replace(hour=0).replace(minute=0).replace(second=1))-2592000 if now().day < 6 else now().replace(day=5).replace(hour=0).replace(minute=0).replace(second=1)}}'
  - platform: history_stats
    name: Bedroom AC Cooling
    entity_id: climate.bedroom_ac
    state: 'cool'
    type: time
    end: '{{ now() }}'
    start: '{{ as_timestamp(now().replace(day=5).replace(hour=0).replace(minute=0).replace(second=1))-2592000 if now().day < 6 else now().replace(day=5).replace(hour=0).replace(minute=0).replace(second=1)}}'
      
  ##### COST #####
  # kWh cost: R$ 0.654533 (for the first 150kWh)
  # kWh cost: R$ 0.782816 (after the first 150kWh)
  # We will just use the most expensive one. Best safe than sorry.
  # Cooling power consumption: 1.092kW (1092W) - from ACs specs
  - platform: template
    sensors:
      bedroom_ac_power_consumption:
        friendly_name: "Bedroom AC Power Consumption"
        unit_of_measurement: 'kWh'
        value_template: "{{states('sensor.bedroom_ac_cooling')|float * 1.092}}"
      livingroom_ac_power_consumption:
        friendly_name: "Livingroom AC Cost"
        unit_of_measurement: 'kWh'
        value_template: "{{states('sensor.livingroom_ac_cooling')|float * 1.092}}"
      bedroom_ac_cost:
        friendly_name: "Bedroom AC Cost"
        unit_of_measurement: 'R$'
        value_template: "{{'%.2f'|format(states('sensor.bedroom_ac_power_consumption')|float * 0.782816)}}"
      livingroom_ac_cost:
        friendly_name: "Livingroom AC Cost"
        unit_of_measurement: 'R$'
        value_template: "{{'%.2f'|format(states('sensor.livingroom_ac_power_consumption')|float * 0.782816)}}"
      total_ac_cost:
        friendly_name: "Total AC Cost"
        unit_of_measurement: 'R$'
        value_template: "{{'%.2f'|format(states('sensor.livingroom_ac_cost')|float + states('sensor.livingroom_ac_cost')|float)}}"

Here’s how it looks on Lovelace

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37950×608 30.5 KB

I do know that the ACs don’t have a 100% duty cycle and are probably using much less power, but the idea is to have a rough estimate, at least while I don’t get a full house power consumption sensor.

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