I've played with normal Factorissimo 2, and I've noticed here that I can't get power to transfer out of factory buildings at all.

I noticed the same

Hi

works for me
https://i.imgur.com/VCV7SiR.png

I had the same problem. It appears as if the factory building is in reach of multiple power poles, only one of them gets the power.

can confirm AnLoDreAs comment

Power from the factory works on 1st placed pole. This is not true for a pole that is not connected to this one. The second standalone pole will not be registered by the factory.

Jumpstarting factory from a different power network will not work.