ok, this is more of a solution post then a theory. BUT!

if you need power for water, need water for food and people, people need gas, gas = the fight vs them......... why not make a water turbine..... like a big wheel, you see on a lake or something, there's even a lake nearby... datu and the guy who fixed the radio, shit isn't there a lake near by? you can do away with generators.

why not just take a few alternators as many car batteries which i'm given is a lot of bled out cars from their gas out there too. daisy chain them together, big old wheel, to an axel, axel turns some sort of belt which then powers alternaters. BOOM, power, if needs be use another water pump to turn the wheel, you can wire up some kind of feed back system for it i'm sure.

just my thoughts.