>>11879243It's one of those "sci-fi authors/thinkers assume that the tech will exist in the future" kind of things. Basically if your civilization is capable of building a dyson sphere, then they would have the capability to store and distribute it. Dyson spheres are kind of dumb anyways, because the gravitational forces involved would tear the superstructure apart.
Dyson swarms are where it's really at, and hypothetically a dyson swarm would be able to direct the harvested energy to a large collector in GEO where it could be stored in massive battery banks and further distributed by directed energy collectors and battery banks to the end user.
All of this is moot if humans can ever find a way to make sustainable net positive fusion reactions though, because then it would be more efficient to just build fusion reactors in human settlements rather than some convoluted scheme to direct energy from the sun to Earth.