Core Fitting Skills

Electronics - Increase the cpu available
Engineering - Increase the Powergrid available
Shield Management - Increases shield Hit points
Shield Operation - Increases shield regen
Hull Upgrades - Increases Armor Hit Points
Mechanic - Increases Structure Hit Points
Energy Management - Increase Capacitor Capacity
Energy systems operation - Increases cap regen rate
Energy grid upgrades - Reduces cpu needs on certain mods and lets you fit essential mods
Weapons upgrades - Reduces CPU need for turrets/launchers
ADV weapons upgrades - Reduces Powergrid needs for turrets/launchers
Shield Upgrades - Reduces Powergrid needs for Shields
(ノಠ益ಠ)ノ彡┻━┻
Module stacking penalty
1st mod: 100.00% effectiveness
2nd mod: 86.91% effectiveness
3rd mod: 57.06% effectiveness
4th mod: 28.30% effectiveness
5th mod: 10.60% effectiveness