Just wanted to poke the member here with what seems like a simple energy monitoring question, that I believe I’m over thinking, but thought I would pass it out there for your thoughts.
Question: Should solar PV connected CT(s) read as a Negative value (when energized), or should it be Positive when energized?
Reasoning: The reason I ask is that today I feed this value as a positive and subtract the solar output from the grid consumption, etc. I guess I’m wondering if instead it would be better to add the negative value as it is energy creation not usage (positive). One example I have run into is that my inverter during non PV creation periods uses 5-7w to power itself and I wanted to capture this delta which does not work as well with my subtracting the negative number in EmonCMS; which I would think it would.
Again, I think I’m over thinking it but had to ask what others are doing an of they even care.