08 Dec 2011:
Cost of Solar Energy
Lower Than Usually Reported, Study Says
The cost of photovoltaic solar energy systems is not nearly as expensive as some energy analysts have projected
, according to a new study from Queen’s University in Ontario. In fact, Queen’s researcher
Joshua Pearce predicts that solar photovoltaic systems are approaching the “tipping point” at which they will be capable of producing energy at about the same price as traditional energy sources. In a study published in the journal Renewable and Sustainable Energy Reviews
, Pearce says that many recent analyses of the costs of photovoltaic solar power — which typically include factors such as installation and maintenance costs, finance charges, life expectancy of the system, and the amount of electricity — have ignored the 70-percent reduction in solar panel costs since 2009. While one 2010 study calculated the cost at $7.61 per watt of electricity produced, Pearce says the cost is actually less than $1 per watt for panels purchased in bulk, although system and installation costs can vary significantly. Pearce also created a calculator to determine the cost of solar power, which is available for download
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South African photojournalist Adam Welz documents the harrowing relocation of six white rhinos to a region that has lost all its rhinos to poaching. View the gallery.
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In a Yale Environment 360
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The Warriors of Qiugang
, a Yale Environment 360
video that chronicles the story of a Chinese village’s fight against a polluting chemical plant, was nominated for a 2011 Academy Award for Best Documentary (Short Subject).
Watch the video.