This is great! This game needs alternate sources of power.
It would also be great if we could jury-rig our cars and generators to run on ethanol. And if we could set up a still to brew our own alcohol as fuel.
It would be nice if we could make Alternate Power Systems when you have enough Carpentry and Engineering.
Most of the stuff can be made at home as shown by this guy,
So you aren't going to need some sort of fab factory to even do basic construction.
Though his setup involves mixing Solar and Wind to charge up large Battery pack ( Which is Similar to Teslas Uninterupted Powersupply Idea )
I feel bump damage ( the damage done by zombies as they knock against something with their bodies ) should change based on the state they are in.
Only damage to unbarricaded windows
Agro State ( Triggered by a specific action )
Damages Unbarricaded wooden doors and Barricaded Windows
Horde State ( More than one zombie hitting door )
Damages Barricaded Doors \ Metal Doors \ Barricaded Windows
This could be done by having each state apply a specific damage type
instead of having to worry about complex math.
This would make it so bases are not just destroyed by random zombies bumping into things because a player made the structure.