Factorio Forums

Tooltip reads usage as 4MW, When it is assembling the rocket it is using 268KW while building the rocket, once the rocket is done building and it goes to launch the power spikes to 4MW until it starts crafting the next rocket and goes back down again.

Not sure if that is intended or not.

It is intended.

don't worry when i first started playing i said the same thing, the tool tip could be better however. i even set up a circuit contraption to not overload my power grid thinking it was going to draw that much power while building the rocket my first time around. technically if you built the entire rocket with productivity modules, removed the productivity and inserted efficiency modules at the last part you would use even less power. but once you scale up to mega base level these things become trivial, and you have beacons and speed modules surrounding your silo.