Concentrating the sun's ray onto solar photovoltaic (PV) modules requires walking the fine line between optimizing power output and not literally melting your very expensive super-high-efficiency solar cells.
According to the latest data from the Federal Energy Regulatory Commission (FERC), March 2013 was a very special month for the U.S. power grid. For the first time ever, all of the new capacity added came from solar power.
If there's one way to describe Buffett, it's "bargain hunter". When people are running away from something, Buffett usually goes in the opposite direction and takes a look to see if there isn't a quality undervalued asset that he could buy.
The National Center for Photovoltaics (NCPV), which is part of the U.S. National Renewable Energy Lab (NREL), maintains a chart that shows efficiency records for all kinds of research solar technologies, from more vanilla to very exotic flavors.
Brightsource and Abengoa are currently working on a 500 megawatts concentrated solar project in California that would be composed of twin 250-megawatt units with what should be the tallest solar towers in the world.