I am using Tuya V2 integration and that works all fine. However, sockets report only power draw in Watts, and do not report energy consumed in Wh or kWh. I have found this guide:
and (almost) successfully applied it to calculate kWh. However, I encounter one bug.
It is working fine when devices are powered and consuming energy for long periods of time. But when devices are turned off and powered back on in quick successions, it is adding huge amount of energy consumed like in screenshot:
2 devices are connected to this socket: speakers that draw a few Watts and kettle, that draws ~2 kW. When speakers are on, it is summing energy well from power, but when I turn on kettle, it adds random ~50/ 30/ 60 Wh instantly.
My configuration is:
template:
- sensor:
name: Grid Import Power
state_class: measurement
icon: mdi:transmission-tower
unit_of_measurement: W
device_class: power
state: >
{{ (states('sensor.smart_socket_1')|float + states('sensor.smart_socket_2')|float)|round(3) }}
- sensor:
name: Lampka pobór mocy
state_class: measurement
icon: mdi:transmission-tower
unit_of_measurement: W
device_class: power
state: >
{{ (states('sensor.smart_socket_1')|float)|round(3) }}
- sensor:
name: Czajnik pobór mocy
state_class: measurement
icon: mdi:transmission-tower
unit_of_measurement: W
device_class: power
state: >
{{ (states('sensor.smart_socket_2')|float)|round(3) }}
and:
- platform: integration
name: Grid Import Energy
source: sensor.grid_import_power
unit_prefix: k
unit_time: h
- platform: integration
name: Czajnik pobrana energia
source: sensor.czajnik_pobor_mocy
unit_prefix: k
unit_time: h
- platform: integration
name: Lampka pobrana energia
source: sensor.lampka_pobor_mocy
unit_prefix: k
unit_time: h
Any idea how to implement kWh calculation from W properly? Thanks
Riemann sum method to be used. Available methods are trapezoidal, left and right.
In case you have an appliance which produces spikey consumption (like an on/off electrical boiler) you should opt for the left method to get accurate readings.
The first thing I will say is that you might have created ‘Lampka pobór mocy’ and ‘Czajnik pobór mocy’ without needing to.
Please go to dev tools / states and show me what is on the right column for sensor.smart_socket_1 and sensor.smart_socket_2
Next thing is most czajnik will consume 2000w when it is on as it is converting electical energy into heat energy so this figure is expected.
Your graph isnt saying you used 2 kWh, it just says you used a lot of power for a short amount of time which is true when you turn on high wattage device.
I’m not sure what the problem is.
Also, try @francisp suggestion of method: left for all integration sensors
this is smart_socket_2 and 1 (I just removed this ID in my main post for code simplicity)
I think that @francisp can be right. Maybe left integration would work better for this spike temporary load. I will have to test this and report back to you.
yes, I know this, but i think it summs W into Wh wrong with short burst of high-power devices.
If you hold down the button on the kettle at 2300W for a whole hour, you would consume 2.3kwh.
Divide that by 60 and you would consume 38Wh per minute.
Your graph shows it went to 196Wh so yes it is a little inaccurate.
It was adding like 60 W in the moment that kettle was turn on, even if for like 5 seconds (it could not consume this amount of energy).
Now I used
method: left
as @francisp mentioned, and now it seems to be calculating correctly. Kettle was running for 93 seconds with 2243 W of power. 93 s / 3600 s = 0.0258333333 hour * 2243 Watts = 58 Wh of energy. HA is showing 58.01 Wh of energy consumed, so it is working correctly with method: left.
The method: trapezoidal was probably assuming 2243 W of power form last state change (the last change before turning on kettle) and thus was adding many Wh right in moment the kettle was enabled.
This has prompted me to set left on my own integration sensors.
Now my other point was, why did you create these?
- sensor:
name: Lampka pobór mocy
state_class: measurement
icon: mdi:transmission-tower
unit_of_measurement: W
device_class: power
state: >
{{ (states('sensor.smart_socket_1')|float)|round(3) }}
- sensor:
name: Czajnik pobór mocy
state_class: measurement
icon: mdi:transmission-tower
unit_of_measurement: W
device_class: power
state: >
{{ (states('sensor.smart_socket_2')|float)|round(3) }}
when you already have
sensor.smart_socket_1
sensor.smart_socket_2
Just seems like you are recording 2 lots of the same information.
You can use customize.yaml or even go to configuration / customizations in the gui to add the missing
You are totally right, these are not needed. That are mistakes that you make following other guides late in the night. Thank you for pointing this out!
