Let's assume we have this super advanced civilization that actually goes around making Dyson spheres around stars.
The purpose of this is to capture all the energy of the star and be a hub of the system in shipbuilding, weapon building, administration, and military matters. Think the Citadel from Mass Effect.
All this free energy is being used to power shields and weapons.
If you had a civilization with such technology and such a station, with a near limitless power source, would the station be invincible?
We see in fiction how shields can be overpowered by constant bombardment. But if you have the sun as your power source, would it be possible to ever break the shields?
The station would also have incredibly powerful weapons, given its power source.
I understand that it's not a matter of pure power, but let's assume that the civilization has incredibly sophisticated shields and weapons, and all they need is the power to power them up.
Assume incredible overall technological ability to the point that their shields can be attacked for months without failing and their cannons,an constantly fire. Would that mean their stations would be invincible?
In the context of galactic empires fighting, Dyson Sphere stations seem like they are checkmate. They have a sun and unless you teleport to the system with your own sun you are not breaking through.
I'm no scientist and so the finer points of science would be very handy here. And I'm not looking to hand wave the whole thing by saying: their science is so advanced. At the same time I'm not interested in limiting this advanced universe to 2020 abilities and understanding.
One thing I've considered is that maybe it is simply impossible to translate the raw power of the sun to raw power for the station, or a time delay / technological obstacle preventing instantaneous transition of power to the shields and, to a lesser extent, weapons.
Is that the case? What are other potential problems with these invincible stations?