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.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.