Here, I’m going to explain everything you need to know about power which generators you want, how to power rooms, and what needs power (and when!).
Wires are totally free, so you can run wires around walls, through the ground, or through walls to keep your base tidy. Generators generate power, and then you connect wires to your devices / rooms to power them. There are two primary resources you’ll need to familiarize yourself with to power your base in No Man’s Sky - generators and wires.