I’m a newbie but have my emonpi setup and running, but Im finding that one of the mains supplies is ready way off - I’ve used a clamp meter to check the values being reported, and power1 is right but power2 is about half what it should be.
The figures are for power1 the clamp meter says 3.6A at 240V, and the emon reads 860W; power2 the clamp meter reads 5.8A at 240V and the emon reads 750W.
I suspect that the reason for this is that the two power supplies that I am trying to read are from two completely independent electrical supplies (ie each has their own meter and own bill etc). I do not know if they are different phases.
The emonpi and the 5V supply are both plugged into the mains supply on power1 - as I understand it, the 5V supply is used to calibrate the readings in some way, so as the 5V supply is coming from a different supply (possibly a different phase) that’s why the numbers are off.
Is this correct? And what can I do to solve the problem?