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The reliability of junction box plays the critical characteristic in PV development. We perform the statistic analysis from 3.8 million modules over 1GW capacity during the first five year system operation. There are total 73 faulty junction boxes spreading out in 26 of over 1,250 project sites globally with 19.2ppm failure rate. Around 85% of failure is contributed by system install sector within...
Water cooking is applied as an efficient screening tool to evaluate various structures of PV module backsheet from three suppliers against thermal and humidity stressing. Visual appearance, adhesion, yellowing effect, water vapor transmission rate (WVTR) and FT-IR spectral are inspected. De-lamination among layers and PET hydrolysis take place after 600 to 800 hours. Comparing with extended damp heat...
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