Reading kWh from POW

[Dagobert1966]

I have a POW to register the used power to charge my car.
The POW is comunicating with Domoticz, but I cannot seem to read the proper kW and kWh in Domoticz.
I've setup a virtual meter : Electric, Power and counter.
It seems to register the Energy #0 sensor of the POW.
How can I setup to measure kW and kWh?

[fork04]

Energy #0 is energy USED from start of Sonoff-Pow in Joules - https://en.wikipedia.org/wiki/Joule

You can map IDX here ^^^

[xoseperez]

Active power gives you the current power consumption in W and, as @fork04 says, the energy field gives you the total aggregated energy since the device started in Joules (1kWh = 3600000J = 3.6MJ).

[Dagobert1966]

Thanks all for the replies.
OK, so energy #0 is in Joules.
But how can I convert this in Domoticz in kWh?

[xoseperez]

Sorry, I can't help with that, I don't use Domoticz myself. The reason to use Joules is that that's the unit of energy in the IS.

[Dagobert1966]

Thanks xoseperez.
Maybe someone else can help?

[digitalesPL]

Id like this also for Home Assistant i guess its a simple maths inside the software? And some data output? I think there is suport for this in Tasmota?

[digitalesPL]

How to get to this information? I saw this on some other page regarding Sonoff POW and Tasmota software.
The presented information has the following meaning:

Message	Unit	Description
Total	kWh	Total Energy usage including Today
Yesterday	kWh	Total Energy usage between 00:00 and 24:00 yesterday
Today	kWh	Total Energy usage today from 00:00 until now
Period	Wh	Energy usage between previous message and now
Power	W	Current power load
Factor		The ratio of the real power flowing to the load to

      |      |   the apparent power in the circuit 

Voltage | V | Current line voltage
Current | A | Current line current

https://github.com/arendst/Sonoff-Tasmota/wiki/Sonoff-Pow

[xoseperez]

I have added the option to select between joules and kWh for energy reporting in the web interface. It's in the dev branch.

[xoseperez]

This is staged for release.

[foncubierta]

Can you get the monthly power consumed?

[xoseperez]

No. If you need this kind of info I recommend you to log the minute consumptions to a database like InfluxDB and the use Grafana to graph daily/monthly/... consumptions

[hyteoo]

Easy fix for this would be to also associate the energy reset to a MQTT topic.
Currently this only seems to be implemented in the webUI... please correct me if I'm wrong.