Shield Depleters- DevNull Mod Question

[ExSentinel]

Quick question because I do not have the time to test it out. Do shield depleters attack the shield generator themselves (i.e. burn them out) or does it just go against the shields themselves (available shield points). Trying to come up with a heavy weapon platform that will nullify this empire that is attacking me. He loves shields to the point of insanity and I just want something that will burn out his generators quickly so that the rest of the weapons on the platform will do damage to the ship itself. Thanks for any help.