Just a quick concept I made for fun, messing with custom brushes, might extend this concept and make a full illustration, anyway its big ass power couplings that draw power directly from the sun and take it to......... what ever could possible need that much power.
Time: approx 1 hour
size: 3000x1Power my PC has used since I started making this image:........................... erm, too much.
Really, starlight (which is how a start outputs most of the energy) gets far too diffuse to be a useful power source once you get out to 5 AU [p.s. - 1 AU = distance from Earth to Sun]. So, getting all up-close to a star and concentrating its EM-output into a directional beam is really the only way to have solar power out to any point in a start system.
An even better idea would be combining the electromagnetic radiation with a plasma stream [and, being from a star, it'll be almost all hydrogen]. Then your "power beam" could/would be performing some nuclear fusion itself, generating some of its own power in the process.