Wrong readings in the P1 meter electricity report

[jvdk]

Hi,

I found differences betwen the readings on my smart meter, the data that is shown in the devices tab and the report of my electricity utility.

When I read out my new smart meter it gives: T1 26, T2 26, R1 37, R2 69 (at the moment the T1 and T2 readings are the same ).

When I look in the Devices page I see the following data:

Device readings.PNG (11.44 KiB) Viewed 1080 times

That is the same as the reading from the smart meter, now more accurately in Wh.

On the electricity report page I see the following:

Report.PNG (167.03 KiB) Viewed 1080 times

What is the difference between "Total usage" and "Counter" and what is the difference between "Total return" and "Counter return"?
I recognize the values 26977 (T2) and 69805 (R2) from the device page, but the readings 26137 (T1) 37445 (R1) from the device page I don't find here.
Is this an error in Domoticz or do I overlook someting?

I am using Domoticz version 4.11074.

Jan

[FireWizard]

Hi Jan,

Your P1 smart meter cuts the values on its display obviously. There fore you see:

T1 26, T2 26, R1 37, R2 69 (at the moment the T1 and T2 readings are the same )

So you have the value in kWh. In the device listing you have the first four values in Wh.

Your P1 smart meter is installed in July 2019 or you have start monitoring it with Domoticz since July.
The "Total Usage T1" has been 1.839 (July) + 23.837 (August) = 25.676 kWh.
For "Total Usage T2" this has been 4781 + 20.230 = 25.011 kWh
The "Total" gives then: 25.676 + 25.011 = 50.687 kWh

The same calculation can be done for the "Total Return"

The calculations above are done by Domoticz and comprises the whole year. If December has ended the value should be equal to your yearly bill.

The "Counter" comes, as you have already seen in your Device list, as far as I know, from your smart meter protocol and so should be equal to what you read on the smart meter itself. I believe that these are updated in the log not so frequently as in the device list.
I guess that your screenshot is made on a Saturday or Sunday, because the normal cost T2 is up to date, while the low cost T1 is somewhat behind.

I hope this gives you some info, but I do not believe that there is bug in Domoticz.

Regards

[jvdk]

Hi FireWizard,

I think you are right; the differences are probably caused by another update rate. Now, Monday at 21:30 h, non of the values in de device list are the same as found in the report overview.

Thanks,

Jan

[daniellee]

I think you are correct; the distinctions are presumably brought about by another update rate. Presently, Monday at 21:30 h, none of the qualities in de gadget rundown are equivalent to establish in the report outline.




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