Breaking it down, the basic problem is either that the supply is understand or the load is overstated.
The supply is the mains and solar. I think the solar is probably OK as both legs appear to match, as they should, notwithstanding that one uses a 100A CT and the other a 50A CT.
The mains are a different story. They are vastly different. Main1 is importing 25 Watts and Main2 is exporting 977 Watts. That could very well be the case, but possibly one is understating. Can you plot the power Watts and Power Factors for both mains for an hour or so when there was no solar?
The load would need to be overstated to cause this problem. It’s hard to get a CT to overstate power. Overstated voltage would do it, and you appear to have a very imbalanced load with almost all of the load on the main1 leg and hardly any load on the main2 leg. Do you know which leg the VT is connected to?
Another possibility is that the kitchen CT is a 50A CT and not a 100A. That would cause the kitchen power to be doubled and your unmetered in the status above would be 10W.