City of Cupertino posts further details, renders of Apple mega-campus
appleinsider.com
appleinsider.com
Maybe ∞, Mobius Strip? (Any torus-related puns must be strictly grounded in toplology)
Given that and the scale of this thing, they probably think it is cheaper to run those generators permanently. Of course they would still need some extra generators to allow for maintenance and defects, but I guess that's peanuts compared to the startup cost of having the generators for the entire building.
Luckily, it also appears to be possible to use the excess heat for cooling stuff. That would be much more popular in Cupertino, I guess.