Silicon Energy (SiE) is rounding another corner with their incredibly tough PV product, the Cascade series of panels.  President Gary Shaver revealed at the 13th Northwest Solar Summit this week that NREL testing of the Cascade module to failure has reached year 80 with little change in appearance and no change in output.  NREL has said that they will stop testing at year 100.  Their report will be out later this years.
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