Question about Energy total

[klaasnicolaas]

Question about Energy total

[klaasnicolaas]

The calculation: https://github.com/klaasnicolaas/home-assistant-glow/blob/master/home_assistant_glow.yaml#L111

[Snobs76]

Great, many thanks. Now my values are correct.
I have to buy a coffee/beer for you man :D

[klaasnicolaas]

@Snobs76 Maybe I should setup the sponsorship option in Github 😅 Beer and coffee is not my taste, that's why I have a buy me a fanta button on my HA config page 🤣

@miv777 for 3200 imp/kWh it would be: 18.75 and 0.0003125.

[klaasnicolaas]

This question is difficult to answer, as in I don't know your situation and therefore cannot say whether the sensor is right/wrong 😅

[Snobs76]

Some example:
If i have a power consumption 250W, then i need 4 hours to get 1kwh, right ?
But the energy total sensor calculates 1.5kwh in one hour with this 250W that I use at night.
There is anywhere a calculation error inside the sensor. Actually he said I have used 60kwh at 24h and this is to much, or for today until now 32.6kwh. I´m not the energy saver and i have 12-15kwh at a day (Home Office etc.).

But where is my error, I have 5000 Imp per Kwh, this is is in yaml factor 12 and looks good, but not the energy total.

[klaasnicolaas]

What if you change the multiply filter at total to: 0.0002?

[Snobs76]

I will try it. 450W actually, set timer for 30min then will have some more information

[Snobs76]

Wrong direction now it counts 0.450Kwh in ~5 Minutes at 450W consumption

[Snobs76]

Damn idea.... do you have 10000 Imp per Kwh ?
If yes then I need instad of 0.0001 0.00005 for my 5000 Imp per Kwh
Is this possible ?

[klaasnicolaas]

The YAML file is based on 1000 imp/kWh. Based on the note from @stevetz I was thinking the value for you should be 0.0002 🤔

[Snobs76]

I will give your number another try :D

[klaasnicolaas]

We have been (re)calculating again and the values 12 and 0.0002 must be correct. If the values are still not correct, it may be due to the hardware. A sensor that is too sensitive, causing it to count 1 pulse twice or missing a pulse.

[Snobs76]

The 0.0002 looks good, I´m testing right know with the values. But how do I calculate the 0.0002.

[miv777]

Please, tell me also what the settings will be when the value is 3200 imp/kWh
Thx 😁

[Snobs76]

Look at post from @klaasnicolaas there all the math that you need.

[stevetz]

Klaas I wonder if there is something further you could add to clarify the sums - I thought the comment i put in the PR would be enough - but seems a few issues with the multiply figures...

Maybe an addition to the readme, something like:

You will need to know the impulses per kWh, or imp/kWh of your meter. Most meters flash at 1000 imp/kWh.
Use this figure in the multiply variables for both the main sensor and the total.

e.g. for a meter with 3200 imp/kWh (ie for 'SMART' branded meters in the UK)
the multiply values will be:

sensor:
  - platform: pulse_meter
    ...
    filters:
      - multiply: 18.75 # calculated  = (60 / 3200) * 1000
    total:
      ...
      filters:
        - multiply: 0.0003125 # calculated = 1 / 3200

For more information see: https://esphome.io/components/sensor/pulse_meter.html#converting-units

(not sure if the e.g. is necessary?)

To be sure, I don't know whether its worth the additional language - or whether once I've submitted the PR to the esphome doc (plan to do this weekend) that might be enough?

As I'm here - I also wanted to ask if you thought of adding this to the 'cookbook' on esphome?

[klaasnicolaas]

I think it's wise to put some information in the readme, even if this information will soon also be on the esphome website.
As for the entry in cookbook, I'll come back to that later.