Stacking penalties

Stacking penalties refer to an effectiveness reduction that is incured when using two or more high, mid, and/or low slot modules (mods) that effect the same attribute. Most, but not all, mods show in their discription if they are subject to this.

The Formula

The stacking penalty for module number n is

S(n) = 0.5^(((n-1) / 2.22292081) ^2)

The Numbers

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

Shield resist mods incure this penalty for the specific damage resisted when used in conjunction with Invulnerablity Fields