My el cheapo 12v switching supply is reading 184 watts at the wall while bertmod says 133watts. If we ignore the BBB, I suspect bertmod does, the efficiency is 72.3%. If I scale up for a Jupiter it's 736 watts at the wall.
I confirm BertMod ignores the BBB and also that the readings from the DC/DCs might be a few percent off (I'm not sure if the readings are temperature compensated, and the DC/DCs usually run quite hot, so there might be some error induced by that)
72% efficiency for a cheap power supply sounds totally possible.