The power/solar/batteries/generator thread

[Beprepared]

Ok, so my Dad has a couple of draft horses. He's been wanting a treadmill for them. To my knowledge their is just one company that makes the historic kind he wants. Athens Enterprise(not on the interweb) they do advertise in Rural Heritage or the Small Farm Journal. So these tread mills are gravity operated(take no power). They also GENERATE power. I horse that already needs/wants exercise can charge a battery bank. There are small animal versions of this made for sheep, goats, and dogs. I believe they start around 2k. A couple of work/herd/sled dogs who desperately want to run 20hrs a day could supplement power needs.