Lets think for a moment about generators and water system.
We now have in 3.0 a generator some lights a car battery, and about the water we have canteen and watertank.
What if you have to make a wires in your base to activate traps such as sentries spikes and more, or you will have to make a wire to the light system, and connect like 10 lights to 1 switch.
And what about the water ?
Well we could have a destilery, that will be connected to the pump in the rivver with pipes.
The pump and the destilery will have to be connected by electrycity to work.