Knc promised 400Gh/s and delivered closer to 600Gh/s for their Jupiter machines.

So promising 3000Gh/s but probably will be closer to 4000Gh/s

4000gh/s at 0.7watts/Gh = 2800watts  puts you into the realm of professional rack mounted modular power supplies such as

http://www.meanwell.co.uk/rcp-1000-12.html