Yep I was thinking about that when you were saying "electric drill for threshing, and an electric fan for winnowing. I need to build a thresher that runs on pedal power." There's an economy to calories - if I expend 600 calories to get 500 calories, I'll lose the game.
I'm not sure how big your threshers and drills are. I was thinking of something like the scale of a hand power drill running off a rechargeable battery; if I have a setup (solar, woodgas, whatever) that can drive a generator enough to charge a battery periodically, then I have portable tools and power, at least as long as the batteries continue to function and recharge (and probably for quite a bit longer than anyone else). Useful, and not burning calories with pedal power for anything needed.
I do have a small stock of gas, 25 gallons and a standard generator. lol and a couple of siphons... next to the bolt cutters... move along, nothing to see here
but I want a setup that still works at least partially to generate power if the stations aren't there for us; should be achievable and it's a fun project.
Electricity also gives you electrolysis, and electrolysis gives you Hydrogen... Turns out there are more calories in water than you might think, not as much as diesel (and not really safe to store), but enough to be impressive.