And "industrial" electricity rates... 
Yes
bloody hell, two power plugs in the top machine? wow.
Haha I believe that is the SP35... 3.6Kw+ of power draw... two plugs are absolutely necessary
it's SP31, which is minimally more efficient than SP35
Yes, SP31 have more efficient than SP35. And Double PSU solution are in all YUKON SP3x devices.
Its brilliant because when one PSU goes down second will work and half of device will still hashing
