Trina Solar has conducted stringent dynamic mechanical load testing (DML) of its 210 Vertex 670W module, comparing it with competitors’ single-glass 540W and dual-glass 535W modules in extreme environments based on International Electrotechnical Commission (IEC) standards. The testing demonstrated that the Vertex module delivered better performance in terms of DML reliability and, with the double-glass 210 mm Vertex also passing extreme 20,000 cycle, 20-fold testing, its DML reliability has been fully validated.