I posted about this in my other thread but wanted to follow up here:
So I went ahead and compared it with my digital clamp meter... measured around 123V for each service line so I just used that as to multiply with my Amps measurements. I pulled the two CT clamps off going to the 100A panel so I was just looking at the clamps going to the 200A panel.
Bottom line, it's definitely not matching with this "fix". At least from what I'm seeing, it's pretty clear this "fix" is also just measuring the phase on CT1. When I pulled off the CT clamp going to CT2, it did not change the readings on CT1. I realize
@JCLJorgenson mentioned he saw the readings jump with just one CT clamp but I did notice he was looking at the Tesla app which can be drastically delayed and I've seen values jump around. I was looking at the inverter page which is near real-time.
I reverted back to how Neurio is supposed to be installed and what I found was CT2 always seemed to match fairly close. However, CT1 seems to be the issue. When exporting to the grid, it looks like CT1 is basically double the value of the measurements I'm getting with the digital clamp meter. When I was exporting much less to the grid (higher demand from the home), the numbers were closer aligned and at one point, they seemed to match. I also noticed this behavior while the inverter was booting up and solar generation wasn't occurring. High grid import numbers were inflated.
Example, Tesla inverter page showed CT1 exporting 5,200W. I measured around 21.1 Amps, multiplied by 123 = ~2,600W.
I'll still compare my energy company report when I get the data with the proposed "fix". I ran it like that all of yesterday so I'll just compare that day. However, based on what I saw today, it seemed pretty clear to me this wasn't fixing my issue.
I also tried moving CT1 to CT4 (and CT2 to CT3) to see if maybe that would change anything but the behavior was identical.
As a side note, I did confirm the Y-splitters aren't an issue for a two panel setup like mine, even when solar generation from the 200A panel is feeding into the 100A panel. It just subtracts the difference and the totals end up being correct (well, minus this issue we're talking about).