I have been out of the extreme cooling loop for a few months now but go pretty into for awhile. I loved my phase change unit, so great to bench without to worries of LN2 and Dice of filling the pot, controlling temps, buying ln2/dice. I had my unit built for me and it was for a caseless rig so...
I would not really go on their info, people's advice here and online power supply calculators can give you much more accurante info
it is them just covering themselves and taking in account overated/sub par PSU's i think
here is a couple more from vaca in colorado:
around $150 but most of that is from our reptiles
when I was folding my power bill was the biggest thing holding me back from expanding and the primary reason I stopped, kinda sad when i think about it :(