Energy from template power sensor

[gregtakacs]

So here is my use case:
I have a power reading that is both in/out (positive/negative) but I need energy reading for the positive part and for the negative parts.

So I created two template sensors to generate the required values and I'm trying to use powercalc to generate the required energy sensors for me. However it's not going so well as the energy sensors don't get created.

this is what I have in my configuration.yaml:

powercalc:
    enable_autodiscovery: false
sensor:
  - platform: powercalc
    entity_id: sensor.pv_energy_1
    power_sensor_id: sensor.pv_power_1
    name: East PV Panels
    force_energy_sensor_creation: true
  - platform: powercalc
    entity_id: sensor.pv_energy_2
    power_sensor_id: sensor.pv_power_2
    name: South PV Panels
    force_energy_sensor_creation: true
  - platform: powercalc
    entity_id: sensor.pv_energy_3
    power_sensor_id: sensor.pv_power_3
    name: West PV Panels
    force_energy_sensor_creation: true
  - platform: powercalc
    entity_id: sensor.battery_in_power
    power_sensor_id: sensor.battery_in_power
    name: Battery In (calculated)
    force_energy_sensor_creation: true
  - platform: powercalc
    entity_id: sensor.battery_out_power
    power_sensor_id: sensor.battery_out_power
    name: Battery Out (calculated)
    force_energy_sensor_creation: true
template:
  - sensor:
    - name: "Battery In Power"
      unit_of_measurement: "W"
      device_class: power
      state_class: measurement
      state: >
        {% set power = states('sensor.battery_power') | int %}
        {% if power < 0 %}
        {{0}}
        {% else %}
        {{ power }}
        {% endif %}
    - name: "Battery Out Power"
      unit_of_measurement: "W"
      device_class: power
      state_class: measurement
      state: >
        {% set power = states('sensor.battery_power') | int %}
        {% if power < 0 %}
        {{ power * -1}}
        {% else %}
        {{ 0 }}
        {% endif %}

Note that the first three sensors are real power sensors and they do generate the expected energy sensors, it's the template ones that do not.

[gregtakacs]

So, it turns out I don't even need powercalc :-) I can just create an integral helper for my power sensor which ill do the exact same thing! So my use case is solved but I'm not sure if you want to investigate this any further.

[bramstroker]

You could also use a template in powercalc power sensor configuration.
Than powercalc will take care of creating both the power sensor with correct device_class and unit of measurement, and also create the energy sensor (riemann integration).

Like this. See https://homeassistant-powercalc.readthedocs.io/en/latest/strategies/fixed.html

sensor:
  - platform: powercalc
    entity_id: sensor.dummy
    name: Battery In Power
    fixed:
      power: >
        {% set power = states('sensor.battery_power') | int %}
        {% if power < 0 %}
        {{0}}
        {% else %}
        {{ power }}
        {% endif %}

But of course there are multiple ways to Rome.
You could also create a template sensor, and Riemann integral sensor yourself.