Sorry to post yet another 3ph mis-reading post but I cannot find an answer that seems to help me. I am in Australia and have a large’ish complex 3ph + solar install. I have 2x Iotawatt devices using YDHC CTs (brought them on openenergy.org site). I had them installed for about 2yrs and I noticed that they read about 20% lower than the retailers meter. In the last few weeks I’ve installed another ~26kW of solar with 3 inverters (3ph) and a 10.2kW battery. Now trying get them to report more-or-less the same numbers and its driving me crazy!
I am using the derived method at present as within a few % would be fine. I have been through the docs and finally understood that the phase the VT is on becomes phase A (in my case thats actually phase B) and then each sequential other then becomes B & C (I think). So for me A=C, B=A and C=b (real-derived). I am sure the mains CTs are all oriented the same way but I just cannot get sensible data out of it.
I see so many questions about this it deserves a YT video to save Bob going crazy! All help appreciated.