Sure, "mining" the sun is going to be tricky, but solar collectors at a safe distance should be pretty feasible. Once you've got enough you'll be harnessing a sizable portion of the star's energy. You could then have local factories using wasteful processes to create materials with a bit more dense energy load to make it more transportable.
Any star should have enough energy for a couple of points. Ideally it should be modded to be more complex than just plodding down a mining station at every star.
Maybe a mechanic where you place a station similar to a terraforming station, but instead of terraforming the star it creates solar collectors. Each year's worth adds perhaps 0.1 more energy, maybe less for low quality stars. At high mineral cost, perhaps with mineral maintenance instead of energy (replacing faulty collectors).
If fractions aren't possible let it take 10 years to complete each "cycle" and then add 1 more energy output.
Any star should have enough energy for a couple of points. Ideally it should be modded to be more complex than just plodding down a mining station at every star.
Maybe a mechanic where you place a station similar to a terraforming station, but instead of terraforming the star it creates solar collectors. Each year's worth adds perhaps 0.1 more energy, maybe less for low quality stars. At high mineral cost, perhaps with mineral maintenance instead of energy (replacing faulty collectors).
If fractions aren't possible let it take 10 years to complete each "cycle" and then add 1 more energy output.