Here is a great report that goes over advanced life cycle testing of modules and their reasons for failure. http://www.nrel.gov/docs/fy11osti/47755.pdf . It is a recent study and there is some good info regarding encapsulents. I can tell you that the high ranker on the results chart is the Silicon Energy Cascade module. With its glass on glass encapsulent and integrated wireway, its the most robust module I've ever seen. We installed the largest WA residential system utilizing these modules in Dec of last year. They are nice to work with...not without their challenges of course, but as far as warranty..I think they will last the test of time.
Eric Thomas Solar Epiphany (206)919-3014 www.solarepiphany.com
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