Rowan, your solar number of 14 watts seems suspiciously low, did you install the CT on the solar pointing in the opposite direction of the other CTs? In other words, the load arrow on the back of the CT should usually point towards the load, away from the breaker. But on solar it is the opposite, the load arrow should point towards the breaker (assuming you are putting the solar CT in the main breaker panel with the other CTs, things could be different in a sub-panel).
