Have any idea how much a ZenithSolar unit costs? Apparently they've given an Israeli community of 1100 people a surplus of electricity with only 16 units.
No, I don't know, but could investigate. It'd be interesting to see a device that was placed in a location over the course of a year and measured different facets of sun and wind for that location and enabled simulation of various technologies.
5 kWh PV + Thermal -- 30,000 Euros
... and they claim their products will last 20 years.