Voltaic Strike (melee) - has no active drop location at the time of writing.

Jolt (pistol) - has no active drop location at the time of writing.

High Voltage (rifle) - complete Hive sabotage missions (Eris) with all three caches found - 4.51% drop chance.

Shell Shock (shotgun) - complete Hive sabotage missions (Eris) with all three caches found - 4.51% drop chance.

Keep in mind, they're not particularly common, so be prepared to get some grinding in: Here's a complete list of electric dual stat mods, as well as some tips on where to find them. Warframe: Elemental Dual Stat Mod Drop Locations If a weapon has 100 base damage and 10% status chance, after slotting in a single dual stat, it will have 100 base and 60 elemental damage, and 16% status chance. This means that dual stat mods are easy to max out, and easy to slot into a build, since a maxed dual stat elemental costs only 7 mod capacity.

Dual stat mods also have only three ranks up to 60% additional damage and status chance.

The basics of it are simple enough - dual stat mods do two things at once: they bolster the given weapon's status chance, and they add a certain percentage of the weapon's base damage in the form of elemental damage.

Warframe primary status mods