It’s common knowledge that DC current in a circuit with an AC RCD impairs it’s ability to work. Domestic properties have numerous electrical items, induction hobs, led lighting, EVCP’s that all can present this within an installation. There are loads of videos on YouTube explaining the logic behind it. It’s in the regs check out 531.3.3! As for sound judgement I’m an electrical technician with an electrical engineering degree and twenty years testing experience. I think I’m suitable to make the decision. There is a reason they are banned in half the world!