Exciting developments are occurring in solar PV (photovoltaic) power generation. New technologies are improving manufacturing processes. Thin-film and organic (plastic) films promise to reduce PV power cost. Solar “grid-parity,” the time when solar power will cost the same as fossil fuel power, is coming soon. 

PV refers to devices that turn sunlight into electricity. In a previous post, I discussed generation by solar thermal (Solar Thermal: The Other Solar Energy). Both schemes have advantages and disadvantages.

PV can turn solar energy into electricity that can supply households and industry without using any moving parts. Since mechanical devices are less reliable than electronic, these systems are nearly maintenance free. Solar Thermal requires a heat engine, such as a steam engine, and an electrical mechanical generator to produce electricity.

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As vocal advocate for nuclear fission power I recognize that it has many associated questions, but I after 30 years of study, I have determined to my own satisfaction that most of the important questions have reasonably good answers. In contrast, I have not yet found reasonable answers for many of my questions related to other renewable energy sources. (Yes, I - perhaps controversially - classify fission as renewable, but that is a discussion for a different post.)

Solar photovoltaic (PV) cells are a popular and often discussed (see, for example Atlantic City Convention Center Plans Largest Solar Roof in U.S., 10% of U.S. Electricity From Solar by 2025, SF Passes Largest City Solar Program in U.S. (Finally), all of which were published within the past week) form of “renewable” or “green” energy, but a casual scratching of the surface knowledge that many people have about the technology reveals some troubling details.

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