Not sure if this is deliberate or not but when I installed this and tested it on an existing base the power costs for said base jumped from something like 1/4 the output of my current power setup to around 10x the max, completely crashing it instantly.

From what I can tell just the Laser Turrets energy needs went from their resting 900kw to 2.4mw resting.
Not sure about the rest. I looked over the pages for this mod and it doesn't mention changing power costs anywhere, so if that is an intended feature it would be nice if that could be added to the description, maybe an option to turn it off too.

Yes, energy consumption is changing in many buildings. The description already says that the parameters of many buildings have been changed. It is also written that a new game is recommended, as there are a lot of changes in the game.