Gokin has launched back-contact solar modules ranging from 480W to 780W for residential, C&I and utility projects. The series supports 1,500 V systems and achieves an efficiency of up to 24.8%.
Chinese wafer manufacturer Gokin Solar has introduced a new series of back-contact (BC) solar modules at its Global BC Eco Summit in Guangzhou, China.
The series includes three products: the GK-3-54HGFb for residential applications, the GK-3-72HGF for commercial and industrial (C&I) roofs, and the GK-4-78HGBD with double glazing for utility-scale projects.
All modules are CE certified and designed for 1,500 V DC systems.
The GK-3-54HGFb residential module offers power outputs ranging from 480 W to 500 W, with efficiencies between 23.5% and 24.5%. The all-black 108-cell panel measures 1,800mm x 1,134mm x 30mm and weighs 21.4kg. It comes with a 25-year product warranty and a 30-year linear performance warranty, with first year degradation limited to 1% and annual degradation thereafter limited to 0.35%.
For C&I roofs, the GK-3-72HGF delivers between 650 W and 670 W, with efficiencies ranging from 24.1% to 24.8%. The 144-cell single-glass module measures 2,382 mm x 1,134 mm x 30 mm and weighs 28.1 kg.
Both GK-3 models use n-type back-contact (BC) cells and feature IP68 rated junction boxes, a maximum series fuse of 25 A and a temperature coefficient of −0.26%/°C.
The flagship utility-scale GK-4-78HGBD module is a double-glazed product rated at 760 W to 780 W, with efficiencies between 23.7% and 24.3%. It uses 156 BC cells in a size of 2,465 mm x 1,303 mm x 33 mm and weighs 38.7 kg.
According to the manufacturer, the module achieves a bifaciality factor of up to 75% and supports a maximum fuse rating of 30 A. The no-load voltage is 58.36 V, while the short-circuit current reaches 16.26 A. The module is covered by a 15-year product warranty and a 30-year linear performance warranty.
Gokin said all modules are certified for static loads of 5,400 Pa at the front and 2,400 Pa at the back and have been tested to withstand 25 mm hailstones at speeds of 23 m/s. The single-glazed modules have an IEC Class C fire rating, while the double-glazed utility-scale product has a Class A rating.
“The BC architecture places all rails at the rear, eliminating metallization at the front and increasing the active light receiving area by approximately 1.1%,” the company said. “Compared to similarly sized TOPCon modules, the design can deliver up to 30W more power, reducing energy costs.”
The manufacturer also cited improved resistance to microcracks and front-end corrosion thanks to the wafer and encapsulation design, as well as resistance to potential induced degradation (PID), salt fog and humidity. The modules are suitable for use in temperatures ranging from -40 C to 85 C. Gokin said the 780W dual-glass module is intended to reduce system balancing costs on large-scale projects by reducing the number of strings and increasing hardware requirements per megawatt installed.
Founded in 2019, Gokin reports an annual production capacity of 80 GW for blocks and wafers and 4 GW for modules.
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