Calculate energy cost for a single device with changing tariffs

Configuration
1

I would like to display a calculated energy cost (in €) for a specific device that’s connected to a Shelly EM and that is never reset (TCO = total cost of ownership).

I was able to create an utility sensor with 3 tariffs (see sensor.consumption_device_f1 below) that are switching correctly and this is my template sensor to calculate the energy cost.

template:
  - sensor:
      - unique_id: device_total_energy_cost
        name: 'Total device energy cost'
        icon: mdi:currency-eur
        unit_of_measurement: '€'
        state: >
          {{ (states('input_number.enegy_price_f1')|float(0) *
             states('sensor.consumption_device_f1')|float(0) +
             states('input_number.enegy_price_f23')|float(0) *
             (states('sensor.consumption_device_f2')|float(0) +
              states('sensor.consumption_device_f3')|float(0)))
             |float(0)|round(2) }}

It works well, but there’s a catch… what if the tariffs change? I mean if I edit the value of input_number.enegy_price_f1 (measured in €/kWh) the whole total would change immediately, while I want that only from the moment I change the input_numbers the total has to be updated “progressively”.

What do you suggest to do that?

2

did you get the solution to this?

3

Of course not! But I’m still open to suggestions :grinning: even though they don’t arrive, unfortunately. I’m just surprised that we’re the only two guys that need that!

4

You’re not alone, here’s a few same or similar threads:

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