If the AC portion has no load, then the DC portion sees it as an inductive load I assume. So does power factor come into play when calculating the DC wattage consumed?
Let's say AC is 100V 0.1Amps no load. Do we just say the power dissipated is 10 watts? Or is it 10 x pf?
If it's 10 x pf that's the wattage we use to compare the DC wattage being consumed? (assuming no other losses).