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"Despite the skepticism of experts and criticism by naysayers, there is little doubt that we are heading into an era of unlimited and almost free clean energy," the Stanford technology maven Vivek Wadhwa declared in the Washington Post last month. The technology that most inspires his enthusiasm is solar energy—and while solar isn't close to "almost free" yet, it is indeed getting cheaper. The prices of solar photovoltaic (PV) modules have fallen steeply by more than 80 percent since 2008. Reason Science Correspondent Ronald Bailey parses current solar power price trends trying to discern where the future might lead.
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