Utility_meter wrong value, but Energy cart is OK?

Configuration
,
1

Hi

I have power meter with configuration:

mqtt:
  sensor:
    - name: "Watomierz 1.8.0 kWh"
      unique_id: watomierz_180_kwh
      object_id: watomierz_180_kwh
      state_topic: "tele/energia/watomierz"
      value_template: "{{ value_json['1.8.0_kWh']|default(0.000) }}"
      unit_of_measurement: kWh
      device_class: energy
      state_class: total_increasing
      icon: mdi:meter-electric

And also utility meters:

utility_meter:
  watomierz_180_kwh_dziennie:
    name: Watomierz 1.8.0 - dziennie
    unique_id: watomierz_180_kwh_dziennie
    source: sensor.watomierz_180_kwh
    cycle: daily
  watomierz_180_kwh_godzinnie:
    name: Watomierz 1.8.0 - godzinnie
    unique_id: watomierz_180_kwh_godzinnie
    source: sensor.watomierz_180_kwh
    cycle: hourly

Yesterday I noticed strange behavior. For some time my sensor was offline (12:30 - 18:30):

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And daily calculation for that sensor “stopped” - so it was calculated wrong:

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All on one chart:

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Total usage at 12:31:34 is 1530.87 kWh and at 18:28:26 is 1538.49. So delta is 7.62 kWh.
And for daily usage at 12:31:34 is 8.46 and at 18:28:26 is 9.52. So delta is 1.06.

But, hourly (and also daily) usage from Energy dashboard is OK. As you can see below at 18 o’clock “missing” usage is present:

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Why my manually defined utility_meter is not calculated correctly?

2

You are lucky that this:

value_template: "{{ value_json['1.8.0_kWh']|default(0.000) }}"

Did not cause you more issues. Defaulting to zero like that can cause a massive jump to the full sensor total when the sensor returns. You should default to unavailable as the change unavailable → total adds nothing.

value_template: "{{ value_json['1.8.0_kWh']|default('none') }}"

I can’t explain your energy dashboard. Which one of the sensors are you using in the energy dashboard?

3 
watomierz_180_kwh

From charts I have values:

  • total usage at 12:31:34 is 1530.87 kWh and at 18:28:26 is 1538.49. So delta is 7.62 kWh.
  • daily usage at 12:31:34 is 8.46 and at 18:28:26 is 9.52. So delta is 1.06.

As You can see 6.56 is missing in daily utility_meter, but energy dashboard is OK.

Second attempt, with new config:

- name: "Watomierz 1.8.0 kWh"
  unique_id: watomierz_180_kwh
  object_id: watomierz_180_kwh
  expire_after: 50
  availability:
    - topic: "tele/energia/watomierz/availability"
  payload_available: "online"
  payload_not_available: "offline"
  state_topic: "tele/energia/watomierz"
  value_template: "{{ value_json['1.8.0_kwh']|default('none') }}"
  unit_of_measurement: kWh
  device_class: energy
  state_class: total_increasing
  icon: mdi:meter-electric

and utility meters:

watomierz_180_kwh_pietnastominutowo:
  name: Watomierz 1.8.0 - pietnastominutowo
  unique_id: watomierz_180_kwh_pietnastominutowo
  source: sensor.watomierz_180_kwh
  cycle: quarter-hourly

watomierz_180_kwh_godzinnie:
  name: Watomierz 1.8.0 - godzinnie
  unique_id: watomierz_180_kwh_godzinnie
  source: sensor.watomierz_180_kwh
  cycle: hourly

watomierz_180_kwh_dziennie:
  name: Watomierz 1.8.0 - dziennie
  unique_id: watomierz_180_kwh_dziennie
  source: sensor.watomierz_180_kwh
  cycle: daily

Again I have mismatch between daily usage and real usage:

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In red and green circles you can see those mismatch.
In red there is daily usage, in green is 15mins/hourly usage.

Third example:

    - name: "Watomierz 1.8.0 kWh"
      unique_id: watomierz_180_kwh
      object_id: watomierz_180_kwh
      state_topic: "tele/energia/watomierz"
      value_template: "{{ value_json['1.8.0_kwh']|default('none') }}"
      unit_of_measurement: kWh
      device_class: energy
      state_class: total_increasing
    - name: "Watomierz 1.8.0 kWh avail"
      unique_id: watomierz_180_kwh_avail
      object_id: watomierz_180_kwh_avail
      expire_after: 50
      availability:
        - topic: "tauron/testy/watomierz_avail/availability"
      payload_available: "online"
      payload_not_available: "offline"
      state_topic: "tele/energia/watomierz"
      value_template: "{{ value_json['1.8.0_kwh']|default('none') }}"
      unit_of_measurement: kWh
      device_class: energy
      state_class: total_increasing
    - name: "Watomierz 1.8.0 kWh sometimes off"
      unique_id: watomierz_180_kwh_sometimes_off
      object_id: watomierz_180_kwh_sometimes_off
      state_topic: "tauron/testy/watomierz_sometimes_off"
      value_template: "{{ value_json['1.8.0_kwh']|default('none') }}"
      unit_of_measurement: kWh
      device_class: energy
      state_class: total_increasing

and utility_meters similar to second example.

Grey line is from reference sensor – always sending data and always available.
Blue line is from sensor always available, but sometimes NOT sending data.
Pink is from sensor sometimes NOT available.

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Top lines are from total, bottom from hourly. As you can see transition from available->unavailable->available caused that calculation is incorrect.