There were SCT013-000 originally on the mains but they were from the “old batch”.
The new ones are from a different supplier and have a slightly shorter, thicker cable and all read the same.
I had been told to purchase the other units as it was better to match the circuit with the AMPs from the CT as it should have been more accurate".
Having run my experiment and also found this thread, that logic proves to be incorrect when used with IotaWatt hardware.
I did read the doco prior to purchase but this caught me out and it might be worth an additional note on both sites that not all SCT013 are the same or usable.
I am happy to pm you or post the source I found for the CTs as it might be useful for other aussies.
Once we have our Inputs//Meters lined up I can order the others I need and place with more confidence.
Going Forward
I have installed the “new CTs” on Mains A/B/C and Solar as this is what I can reference meters against. It will take another 24 hours to be able to line up with the meters as I have been logging my meters at 10:00am in the spreadsheet. I will report back.
I have validated that with load on known circuits for A/B/C that Iotawatt reads 1.00pf (at ~2000W) eg moving the kettle.
I can see about 680W on Solar with pf1.0 which is closer to what the inverter tells me its making. (Still about 75-80% though).
The pf for PhaseA does fluctuate a little between 200-400 watts (washing machine on pre wash).
This may be normal - its when the load decreases over time vs load stopping (eg motor reducing RPM over 30 seconds). I don’t know if its an issue but mentioned it for completeness.
I cant comment on PhaseB/C as anything that fires up starts around 500W and it locks in pretty quickly.
Basic setup as follows:
Inputs
EmonCMS Web Server Inputs (logging to a australian azure host for now).
Power Factor on Mains A examples
Zoomed in Graph from Last night - pause in logging?
We didn’t get any voltage reads as 0 but there a few times it looks like we flatline.
