Ah, an oversight on my part. It should be 12 damage per shot, not per second!
In combat, Apollo will consume more energy when firing beams. Hopefully this should be offset slightly by an increased rate of fire so that it is in combat for a shorter period of time in comparison (ships will be destroyed more quickly). How it works out in practise, I am not sure. We will have to see. More often than not, homing torpedoes are used as ordnance rather than batteries due to the changes we’ve made to the efficiencies too, so even though it will consume more energy, the Apollo should still be efficient enough to cope.