Power output is for sure important, but 1. Being able to take your power source with you, so it also works behind nearest asteroid is even more important 2. H

Power output is for sure important, but 1. Being able to take your power source with you, so it also works behind nearest asteroid is even more important 2. Having your own source, so not to be dependent on one megastructure, because it is a single point of failure and single point of control of civilization.