And while I'm still OT, lol, Ralph thanks for saying how you were defining cost (installed watt). The inverter is so-far unreliable and expensive to replace. I'm hearing numbers like 8 to 10 year life spans.
On centralized solar, that approach lets non-photovoltaics, um... shine. A field of mirrors to heat a central tower and the 'long-trough' equivalent have proven to be fairly efficient and capable of real community power-station output.
On the "green" side of things, most of the public doesn't account for the energy and environmental impact of manufacturing typical PV cells. Tarnishes the green a bit.
