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Very good book but tech went lot further than David expected in many places (ie. solar power efficiency vs price).

This page tried to keep it updated:

Amazingly, LCOE prices of utility size PVs have dropped another 30% - 40% just since this update alone.

And this is not some cherry picking. 2-3c/kwh in the US, India, Chile, Middle East, etc..

Thanks -- that's a pleasant surprise (both that technology has advanced further than he expected, and that people are keeping his book up to date)!