Pcb should cost most energy than is drains. To capture energy from enemy ship should cost 2x the drain. Why you say? Because it already has "super" autoaim, alone can disable a capital ship and doesn't use much energy as of now.

+1 I don't know about 2x but I agree that currently it's energy cost is so low that it doesn't have to be considered at all.

if the result of this suggestion is that you cannot pinout a ship because you will ran out of energy firing a pcb: -1
we dont care if it makes sense from a "scientific" point of view when it fits a gameplay.

No because otherwise energy weapons will become practically useless with a pcb on the side.