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Defective Panels Threatening Profit at China Solar Farms: Energy

Flaws found in some Chinese solar panels can drastically eat into their efficiency, reducing how much power the panels will produce as the country races to meet aggressive goals to hold the line on fossil fuel emissions.

The defects, found in products set to be used only in China, are in a coating that suppresses reflections on glass, allowing the panels to capture more light. About 23 percent of samples taken from dozens of Chinese companies failed to meet requirements, according to regulators in China. For samples from Jiangsu, the eastern province where much of the glass is made, the rate was as high as 40 percent.