I’m sure these are SCT013-000. I got them from Amazon, (which doesnt mean a heck of a lot in terms of being the genuine stuffs!) but I did open it up and saw there are no burden resistors and it has the black diode on it.
Outside markings:
For comparison, I then removed both SCTs from the sub-panel and connected them to the same line as my HeatPump and below are the results (didnt select Double since its just to test). Amazing how much it differs from the H040-50 CT I got from you which is connected to the HP. If I then double the readings, SubA differs by 148W and SubB 232W. Is it normal to have such a big variance (>5%) for these CTs? I also tested with a clamp ampmeter which read 10.67A on the same line, so 10.67Ax123Vx2 = 2625W, which is pretty close to the H040-50 reading of 2604W.
I’ve asked AMZ for a replacement but assuming it comes back with the same variances, would you recommend setting these CTs as generic and adjusting the turns etc to get the measurements closer to the H040-50 or will it make things worse as the wattage changes?