Completed Death Star II vs. Imperial starfleet

Could the entire imperial navy defeat a completed, second Death Star, in an open space battle with no hyperspace escapes?

No. The 2nd Death Star had its own shield generator and if that wasn't enough its durable enough to tank the Executor smashing into it with no damage, the same Executor that has a power output of a Medium Sized Star. If the Navy rammed into it, they could. But then you have to take into account all the Turbolasers outfitted on it, and they possibly have a better range than any ship.

Originally posted by The Merchant
No. The 2nd Death Star had its own shield generator and if that wasn't enough its durable enough to tank the Executor smashing into it with no damage, the same Executor that has a power output of a Medium Sized Star. If the Navy rammed into it, they could. But then you have to take into account all the Turbolasers outfitted on it, and they possibly have a better range than any ship.

Uhh could the Death Star really tank the superlaser blasts from the two Eclipses, several SSDs as well as millions of warships?

Forgot about the Eclipses. Guess this depends on range, really.

Also does this count in the Sovereign classes as well as the Galaxy Gun?

Even without the superlasers, the Death Star won't survive against the entire fleet.

Originally posted by Lord Lucien
Even without the superlasers, the Death Star won't survive against the entire fleet.

Indeed. The CIS at its height fielded millions of capital ships. The Empire has superior numbers and tech to even this.

If you want to look purely at mass though, a Death Star II potentially equals billions of star destroyers.

How so?

In terms of tonnage, a 900 kilometer in diameter, spherical battle station, compared with a star destroyer of around 1.6 kilometers in length...I'm too lazy to do the math/approximations.

Originally posted by Master Han
In terms of tonnage, a 900 kilometer in diameter, spherical battle station, compared with a star destroyer of around 1.6 kilometers in length...I'm too lazy to do the math/approximations.

True, but only the surface area is armed with turbo lasers, and they are far more sparse on the Death Star than they are on a Star Destroyer. There are only 15,000 turbolaser batteries aboard the Death Star. Where as I am pretty sure a couple of barrages from the fleet will take out the Death Star. The fleet will take casualties. But the Death Star doesn't have enough guns to wipe out the fleet before it can unleash a couple of volleys of turbolaser fire.

The entire Imperial fleet? Death Star II goes down, even without the Sovereign classes and Galaxy Gun.