We have been informed that you can run most current generation miners on 277 volt power, without stepping it down. Does anyone have any information or insight on this?
It depends on what do you mean by the current generation, if you mean the latest generation then that's wrong info, Bitmain's gears like the S19 and S19 pro won't run on 277 volts, Microbt M32 and most of the M30 series require 176-264V.
As far as I know, only the following miners work on 277V :
M10, M20, M20S, and M21S.
In other words, any miner that uses one of these PSUs p21 and P11.
Old gears like the Antminer S9 can pretty much use any PSU that has 10*6pin cables or more and outputs 12v, there are many 277V PSUs with those specs, so that is an option if efficiency isn't a factor.