Comment Re:Economies of scale (Score 1) 302
Not that rare, really. A couple of months ago I was trekking through hill country in northern Burma, and several villages that I passed through had teeny tiny hydroelectric schemes on the go that provided the only electricity they had. There was very little of it, so they were careful about how it was apportioned, but they didn't need much, either. And all they needed to do this was the river that passed by and provided them all with their water.
The world's littered with little riverside villages like this, and they could all do the micro-hydro thing. They aren't going to be producing 20kW, probably not even 2kW, but in these cases it's 2kW more than they had before without recourse to generators.