Help needed to create a WATTS sensor from a SUM

Energy
1

I have summed up the power from 3 sensors, and it gives me the correct value I want. But I assume that this is just an integer. I want to have this value recognised as WATTS. A Utility Meter just increments. I just want a Watts figure every minute or whatever - and whatever that figure might be

Thanks in advance

2

Use device_class and unit_of_measurement

3

Sorry, but where ? I don’t see any Helper type called device_class nor do I see any setting within the Summed sensor.

4

You didn’t tell how you do the sum, did you?
I’m assuming a template sensor, here.

5

I used the “Combine the state of several sensors” Helper to Sum up the three Power entities

6

Then, if all of the input 3 sensors have the same unit of measurement, the sum will have it as well

7

You can not feed a power sensor to a utility meter. It only accepts totals, like energy sensors.

To convert your summed power sensor to an energy sensor use the integral helper. Most likely with the method: left to minimise approximation errors.

8

Thanks all for the responses yesterday. Indeed @koying the SUM is in Watts as it is a combination of several Watts sensors.

I think the issue actually appears to be the Power Flow Card which doesn’t appear to recognise the Summed item as valid. I then confused it with another which I created for a different place on that card.