https://www.jameco.com/Jameco/Products/ProdDS/2337471.pdf

3 Questions:

1. The typical input power of 12A / 115v is 1380 watts. It states an efficiency of 86%. Since the end output is 5v 100A (500 watts), I would expect the input wattage to be somewhere around 580-590 watts. Why is the input wattage so much higher than the output wattage? The gap is much larger than the efficiency losses. I ask because I will need a lot of these for a project, somewhere around 120-160 of these! So trying to ballpark how many circuits on a the breaker box I will need to supply all of these. Since the output 500-600 watts, I was hoping I could power 3x of them per a typical 15Amp breaker (1800w). But the large input amperage/wattage seems to indicate I can really only have 1 or 2 per circuit unfortunately.

2. To further complicate the input amperage/breaker/circuit count, the inrush current is quite high at 35A. I assume inrush current only sustains for a few milliseconds. Do "normal" circuit breakers account for such a high inrush current, or will special breakers be needed?

3. Is there any way to estimate the power usage of these power supplies when no power is being drawn from them? Are these types of power supplies pretty efficient at idle?

Thank you!