Since everyone hates fuel powered and solar powered crafts, why not wind power?
Specifically wind turbines mounted in vehicles. I’ve made three wind turbines from alternators and a few sheets of scrap myself. So it’s not unrealistic that your average survivor couldn’t.
Also sails!
Pros:
More consistent than solar, bad New England weather = more power
A lot less resource intensive to repair.
Could be made using existing solar power system.
More easily mass produced than solar
Cons:
Unless it’s windy out if your moving your losing power.
Has to be mounted on the exterior, making it vulnerable to zombies.
Rather fragile.
Yes, I want to make a sail and electrically powered apocalypse craft.