The Electric Furnace is a basic machine in the IC2 mod, that works as an electrically-powered, and faster version of the Iron Furnace. It runs on EU power, and accepts LV current (without upgrades).
It accepts upgrades in four slots, that do stack. With the upgrades, speed, onboard energy storage, or different kinds or EU current can be improved.
Since the Electric Furnace can process the same materials as a regular Furnace can, but without the need for coal, it becomes a useful machine to obtain in the early stages. A Generator, Macerator, and Electric Furnace is one of the most standard setups.
To make the Electric Furnace, does not require many materials, an Iron Furnace, an Electronic Circuit, and 2 Redstone Dust.