The microhydro plant
I'm surprised a little that this was the best idea to provide energy for the home.  I would have thought evacuated solar collectors for hot water, solar photovoltaic for electricity with some deep cycle batteries, and wood fire for indoor thermal would be more reliable and efficient.<p>It looks like this is in southern Chile, though, maybe the solar incidence so far from the equator doesn't allow it?  I wonder how reliable the source for the stream is.