Quote Originally Posted by factotum View Post
You'd have to assume the Pa'anuri already had a nearly working core generator that they just weren't using, though--the idea they could build such a thing within a few years is a bit hard to believe, especially when it's so much more powerful than the Milky Way one.
While I can't speak as to why the Pa'anuri didn't have a core generator up and running, the power difference comes from the different sizes of the super massive black holes at the center of the galaxies: ~4 million solar masses for the Milky Way SMBH and 110-230 million solar masses for Andromeda's SMBH.