Do the subpanels that hold the Solar breaker only hold the solar breaker, or do they also hold regular load breakers?
Because if they do then you cannot monitor these subpanel through their feeding breaker, because the power will eventually go in both direction there, and right now, the 50A CTs do not report bidirectional power. In the future they will, but right now they don’t.
So if a 50ACT is on a breaker designated as load and installed in the load direction, they will always record the power as + regardless of direction, and 50ACTs on a breaker designated as Solar (installed in reverse) will always report load as minus regardless of direction