01 May '14, 10am

Solar Panels May Last Longer Than You Think

The rule of thumb on the long-term performance of photovoltaic (PV) Generation of electricity directly from sunlight. A photovoltaic cell has no moving parts; electrons are energized by sunlight and result in current flow. panels is that output will decline by about 1% each year. After 20 years in service, panels should still be able to produce roughly 80% of their rated capacity. But research at the National Renewable Energy Laboratory finds that rate of degradation is probably overstated, according to a post at Engineering.com . Researchers found the output of the most common type of panels made with mono-crystalline silicon fell by less than 0.5% for panels manufactured before 2000 and by less than 0.4% for panels made after that date. The difference is significant: after 20 years of use, panels manufactured today should be producing 92% of their original rated capacity...

Full article: http://www.greenbuildingadvisor.com/blogs/dept/green-buil...

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