Convert "Heat Amount" to "power consumption"

[robotnikz]

Hello everyone, is there are possibility to use the Heat Amount Sensor from the Luxtronik Integration divided by the JAZ (=Jahrearbeitszahl) = Real Power Consumption. I think that would be the better use for the Energy Dashboard.

So for example:

17.000 kWh Heat Amount : 4,8 (JAZ) = ~3500kWh real power consumption

Possible? Thanks in advance guys and thank you very much for your awesome work!

[Bouni]

You can do that using a template sensor. Where do you get the JAZ from? Honestly I've never dived deep enough into the matter to understand what JAZ really means 😅

[Bouni]

See https://www.home-assistant.io/integrations/template/ for reference

Should look something like that (untested):

template:
  - sensor:
      - name: "Real Power Consumption"
        unit_of_measurement: "kWh"
        state: >
          {% set heat_amount = states('sensor.heat_amount') | float %}
          {% set jaz = states('sensor.jaz') | float %}
          {{ (heat_amount / jaz) | round(1, default=0) }}

[robotnikz]

Hey @Bouni , thanks for your answer. The JAZ is calculated like I mentioned.

You have the Heat Amount from the Heat Pump, divide it by the real used kWh from the electricity meter and voila, there you have the JAZ :)

Could you tell me how this template sensor could look like for a JAZ of e.g. 4,8?

[robotnikz]

Sorry was too slow :) I'll try that. Will this be visible in the energy dashboard too?

EDIT: And I do not have a sensor for the JAZ, so this must be a fixed value in the template sensor. How shall I change the template then?

[robotnikz]

I think it works, here e.g. with a JAZ of 3.5, but it's not showing up in the energy dashboard. Any tips? 🤣

template:

• sensor:
  • name: "Real Power Consumption" unit_of_measurement: "kWh" state: > {% set heat_amount = states('sensor.luxtronik2_heat_amount_heating') | float %} {% set jaz = 3.5 | float %} {{ (heat_amount / jaz) | round(1, default=0) }}

[robotnikz]

Got it working, also visible in the energy dashboard with device_class: energy state_class: total_increasing

---

template:

• sensor:
  • name: "Heizung Stromverbrauch" unit_of_measurement: "kWh" device_class: energy state_class: total_increasing state: > {% set heat_amount = states('sensor.luxtronik2_heat_amount_heating') | float %} {% set jaz = 3.26 | float %} {{ (heat_amount / jaz) | round(1, default=0) }}

Thank you very much 😄

[kbabioch]

• {% set heat_amount = states('sensor.luxtronik2_heat_amount_heating') | float %}

As a side-note: Does anyone know / has double-checked how accurate this data is? It is provided by the manufacturer, so I would be interested to see if the data reported is accurate.

The calculation of the Jahresarbeitszahl (JAZ) (= SCOP in English) is interesting. On the other hand it requires external sensors to measure the energy, etc., so not everyone will have it available.

[AJediIAm]

Please note that "heat amout" IS NOT energy used. It is the energy produced for heating. Similarly, there is a sensor which keeps track of the energy produced for hot water.

If you have a separate power/energy meter, you can calculate the SCOP using: ("heat amount" + "hot water amount") / "energy meter". Or calculate separate SCOP for heating and hot water creating separate power/energy meter sensors based on the heat pump state.

[robotnikz]

Please note that "heat amout" IS NOT energy used. It is the energy produced for heating. Similarly, there is a sensor which keeps track of the energy produced for hot water.

If you have a separate power/energy meter, you can calculate the SCOP using: ("heat amount" + "hot water amount") / "energy meter". Or calculate separate SCOP for heating and hot water creating separate power/energy meter sensors based on the heat pump state.

You're right. This is exactly why I use the JAZ as a divider to get the "real" used energy out of the heat amount". It's not that exact but at least a direction for me to track the energy used. When time comes, I'll update the JAZ in my configuration.yaml to a more detailed one when a year is over. That's the approach for now.