Yesterday I’ve recieved my long-awaited IotaWatt. The installation was pretty painless, despite the fact, that I live in Poland and have w 3 phase 4 wire system.
My first milestone is to have an accurate and reliable overall power meter. I’ve used the docs how to install on a 3 phase derived system: installed the voltage transformer and 3 CTs on all 3 phase power lines (black, grey and brown wire). I’ve just looked at the graphs, both in Grafana and in Graph+ and I can see, that one of my phases is giving negative results:
I have a sollar installation, but it’s turned off for the whole time.
Here’s the config:
The reversed checkbox is checked on inputs which were identified by iotawatt as reversed (but that also changes in time, so I’m not sure is it done right).
Tomorrow I’ll check if CTs are mounted in the same direction, but I was under impression by one of the forum topics, that it can be corrected (even in 3phase system) programmatically.
So my question is really - is my set up ok, or are there any mistakes (negative output from one of the phases?)?
Update 1: I’ve set the wrong model for my VT (but I calibrated it manually).