OVO Energy Gas Reading not available to Home Assistant Energy Consumption

[dave-tucker]

The problem

I've set up the OVO integration and I can see my Electricity and Gas readings from my Smart Meter. I can add the Electriciy Reading and Cost values to the "Energy" tab to track my usage. I cannot add the Gas source as the UI says "No matching statistics found"

What is version of Home Assistant Core has the issue?

core-2021.9.6

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

ovo_energy

Link to integration documentation on our website

https://www.home-assistant.io/integrations/ovo_energy/

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

[probot-home-assistant[bot]]

ovo_energy documentation ovo_energy source _{^{(message by IssueLinks)}}

[probot-home-assistant[bot]]

Hey there @timmo001, mind taking a look at this issue as it has been labeled with an integration (ovo_energy) you are listed as a code owner for? Thanks! _{^{(message by CodeOwnersMention)}}

[timmo001]

Gas is measured by OVO in kWh, not m³ hence why this measurement does not show up

[dave-tucker]

Hmm I wonder if we could add a value for m3 for this purpose or whether Ha could support kwh for Gas units. Conversion (according to a couple of calculators ftom a quick search) should be as simple as Kwh / 10.5 (sometimes rounded up to 11)

[RCGrahamWilmott]

You cant just divide kWh by 10.5 (or 11) to convert to m3. The exact equation is: [amount of M3] [volume correction factor] [calorific value] / [kWh conversion factor] = [amount of kWh]

volume correction factor = 1.02264 for all UK gas suppliers calorific value must be between 38 and 41 within the UK, with an average of 40. http://mip-prd-web.azurewebsites.net/DataItemExplorer/Index allows for discovering the exact value per location but maybe a bigger job than hard-coding the approx value of 40 kWh conversion factor = 3.6 for all UK gas suppliers

Therfore, to do the opposite and convert back: [gas kWh] * 3.6 / 40 / 1.02264 = approx [gas M3]

You can create a template sensor using something like:

template:
  sensor:
    - name: Gas Consumption (Approx)
      unit_of_measurement: 'm³'
      state: "{{ states('sensor.ovo_last_gas_reading') | float * 3.6 / 40 / 1.02264 }}"
      icon: 'mdi:fire'
      state_class: total_increasing
      device_class: gas

[github-actions[bot]]

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