But BS solaris on heavy (large BS's characteristically defined by turret numbers ranging from 15-18, with 1 million plus armor) battleships DOES suck. Pulse cannons are also useless on large BS's because they are simply very inefficient. You're primaries can do shield damage faster ANd cheaper.
But, then again, all of the Solaris problems will be supposedly fixed by Mjolnir and his wizarding band of turret class splitters.