The progress with solar technology has been impressive and is well summarized in the following chart which shows the dramatic decline in the price per wattWhenever someone shows a chart like this there will quickly be people who decry subsidies for solar. The answer of course is that at this point instead of subsidizing solar we should be taxing carbon, which would make solar instantly the preferred technology for homes everywhere. In my personal portfolio (outside of USV) I am very long sola...