“By combining the high efficiency of crystalline silicon with the new, stronger encapsulant from DuPont, our module offers a new level of physical strength, durability and improvements in design,” says Gary Shaver, director of sales for Silicon Energy.

High-efficiency crystalline silicon wafer technology is well-established in PV modules, but the fragile semiconductive wafer material requires protection against impact, flexing and moisture. Traditionally, this protection has been provided by surrounding the silicon wafers in a polymer called EVA, supplied in a sheet form. 

Compared with EVA and other available encapsulants, the new DuPont^TM PV5300 sheet is based on ionomer, which the manufacturer says is up to 100 times stiffer, 5 times stronger and more resistant to moisture intrusion.

“DuPont’s ionomer sheet technology comes from our advanced interlayer business for safety glass, where the original challenge was to find a clear material that could help laminated glass meet hurricane codes,” explains Steve Cluff, global encapsulants business director for DuPont Photovoltaic Solutions.

DuPont^TM PV5300 Series encapsulant sheets provide clarity and impact resistance, high strength and adhesion to glass, allowing Silicon Energy to build modules suited to not only high wind loads, but also heavy snows typical during the winter season.

To manufacture its module, Silicon Energy uses two 60-mil layers of the DuPont^TM PV5300 encapsulant to surround the silicon wafers, and adds high-transmittance tempered glass to complete the structure.

“Because the new DuPont encapsulant is more resistant to moisture intrusion, we’re also able to innovate with an open-edged framing design,” Shaver says. “This allows snow, water and dirt to just slide right off, which increases module performance.”

The new modules are designed with frames and wiring channels along the sides, making installations simple. The company’s “Cascade” design not only improves visual aesthetics, it also lets more air to circulate beneath the modules, which improves module performance.

DuPont announced commercial availability of its new PV5300 Series encapsulants in May 2009. Silicon Energy began testing the material about two years ago, and is the first manufacturer in the United States to complete a new module design with the material. The modules are fully certified and now being shipped commercially.

Manufactured by Silicon Energy, a strong new photovoltaic module made with DuPont™ PV5300 Series encapsulants is ready to withstand wind and snow.DuPont™ PV5300 Series encapsulants helped Silicon Energy design an open-edged photovoltaic module that lets air circulate and readily sheds water and dirt.

DuPont™ PV5300 Series encapsulants helped Silicon Energy design an open-edged photovoltaic module that lets air circulate and readily sheds water and dirt.