Originally posted by The Merchant
There has never been a stated power output for a Harrower-Class, while the Power outout for an Imperial Star Destroyer is 9.28e+24 Watts. Convert that into Joules and it's basically using 3 Petatons every second. A Petaton can destroy entire Continents. And Star Destroyers can actually convert most of that into firepower. And that's not taking into account that they can store up said energies (Most huge facilitates take into account Watt-Hours rather than just every second.) Meaning that in an hour of building up energy, a Star Destroyer is producing 8 Exatons of firepower, at least half of it can go to the weapons. Once you hit that range you're destroying small Moons/Planetoids. Again, you're pretty much using a superweapon that was just mounted on a Harrower that uses a chain reaction to destroy a planet, they cannot be used against other ships. Read the description on how the Desolator actually destroys planets. No other Harrower even has that. And don't compare the conqueror, which uses brute power to destroy planets, against the Desolator, which uses a chain reaction that does not tap into the power output of the Harrower class.
I am not sure what you are trying to prove here. My point isn't about how much power output a starship have and what that power output can achieve in the context of destruction, if considered separately. This is silly point since that power output is being used to run all systems of a starship and cannot be converted to firepower of same magnitude that it may theoretically do in the manner you are pointing out. The firepower of the starship depends upon the weapons mounted on it.
Desolator is a customized Harrower-class dreadnought with a superweapon on-board. 3 reactors of this starship were designated to power this weapon system alone. Starship still had other reactors on-board to run the rest of the systems.
Conqueror is a model similar to Doombringer, both were equipped with a superweapon with which they could eliminate entire fleets with a single blast.
http://starwars.wikia.com/wiki/Conqueror_(superlaser)
http://starwars.wikia.com/wiki/Doombringer
If you don't have data on power output of Harrower-class dreadnought then your point about power output of OT era Imperial designs is useless to bring in to this discussion. But keep in mind that it would take 10 years to build a standard model with normal procedures and 1 year to build the same model from a Star Forge like factory drawing power directly from a star.
By the way, Doombringer and Desolator models proved that Harrower-class dreadnoughts are capable of tremendous power output. The superweapons mounted on these models required tremendous power output to function.