You have always had that ability with various aftermarket power meters, the ones that use CT clamps around the power cables in the meter.This has been available and work with even old analogue meters.Technically, a sparky should hook that up, so that is done correctly, and due to the rear board access with live wire risk. I'm not sure live info could be accessed still, pretty sure retailers still don't get the data from the DNSP until next day, which is why consumer access is usually late next d ...