I can mouseover a building and it will have both a "Consumption" and "Energy" field. The Consumption field varies wildly, often displaying 10 times the MW of the Energy field. The Energy field at least seems to be accurate for the building's current energy requirements, not accounting for the number of buildings. The energy requirement adjusted for the number of buildings etc is displayed on the left under the power symbol, and it does not match the Consumption field in the mouseover tooltip.

So, uh, what is it meant to be for? It doesn't seem to be working right.

A second bug: energy requirements are unaffected by the number of beacons. It's as if they cost no energy.