I’ve just bought a couple of POWR3’s. I installed one a couple of days ago to control the power to my workshop and to see how much power I’m using. Ive had a look at the consumption and it seem to be wrong
159 / 246.35 = 0.64A not 1A like it’s displayed
I’ve checked the voltage with a multimeter and that is displaying correctly. It’s the same in the eWeLink app too.
Is anyone else using one of these??
Click on the current entity, click on the cog in the pop up card. In the settings what is the Display precision set to?
It’s set to 1.56
I’ve just tried the second one, that one is reading incorrectly too
I’ve just tried it with 3 different loads
80w TV 73.88w 0.42A
10w Bulb 10.5w 0.06A
30w monitor 28.11w 0.29A
So the wattage seems to be correct, it’s the amp calculation that seems to be out
That’s not how it is done. The power is calculated from the voltage and current (and their phase angle).
Is it reporting Reactive, True, or Apparent Power?
None of the loads you mentioned are purely resistive. They will have an inductive or capacitive (reactive) component.
See: https://eepower.com/technical-articles/transformer-power-ratings/
Try measuring a purely resistive load like a bar heater.
I’ve emailed Sonoff as I can’t find anything useful.
I’ve got a heater in my workshop so I’ll try that tomorrow afternoon