[bagacrap]

What would they use all that energy for, and how would they use it in a way that wouldn't radiate heat or light on par with the amount captured?

[pharke]

A good use might be computing power whether its for storing the minds of everyone in the civilization or powering one big mind or simulating universes or maybe it's all dedicated to finding a way to reverse entropy.

If we're assuming a highly advanced civilization aiming for maximal efficiency I would hope that they have figured out how to make all of their electrical systems out of high temperature superconductors.

[Matumio]

Is there really a way to "use" energy for computation that doesn't just convert all of it to heat?

[strbean]

Store it as mass!