Germany-based solar tracker developer Sunoyster Systems has presented a new lightweight solar module for rooftop applications at the Smarter E event in Munich, Germany, last week.
The PVbondi module features a power output of 450 W and an efficiency of 22.2%. The glass-glass design incorporates 96 monocrystalline solar cells. It measures 1,780 mm × 1,153 mm × 48 mm, keeping it below the two-square-meter threshold. The datasheet lists a weight of approximately 24 kg and a bifaciality of around 80%.
The module is designed for an operating temperature range of -40 C to 85 C, with a temperature coefficient of 0.29%/C. Sunoyster offers a 15-year product warranty and a 30-year performance warranty for the new product. After 30 years, it is expected to retain 87.4% of its initial output.
The lightweight module is intended for PV systems on roofs with limited load-bearing capacity. It is equipped at the factory with a plastic substructure. It is bonded to the roof via this underside structure, positioning the module approximately 5 cm above the flat roof surface. This reportedly improves rear ventilation compared to directly bonded lightweight modules, which can increase energy yield. “Components such as cables, junction boxes and connectors can be mounted on the rear side, which also helps protect them from UV exposure,” the company’s founder, Carsten Corino, told pv magazine.
The module name refers to its high adhesive strength despite being bonded at only a few points. The adhesive strength is reported at up to 15 tonnes per module, eliminating the need for ballast on flat roofs. According to Sunoyster, this reduces roof load from around 50 kg to 5 kg per square meter. Eliminating substructures and ballast reduces material use and installation time; the company states that up to 350 modules can be installed in a single day.
In addition to the substructure, Sunoyster uses edge protection components. The company supplies both the substructure and edge protection to an unspecified Chinese licensee, which manufactures the modules to specification. Sunoyster has applied for a patent for the InterStructs substructure. The polymer profiles are electrically non-conductive, eliminating the need for module frame grounding. The EdgeGuard edge protection is designed to protect the modules during installation and from hail and mechanical stress during operation.
“Insurers favor the highest fire safety rating—Class A under UL 790. Once certification is complete, the PVbondi glass-glass module is expected to be the only adhesive module worldwide to achieve this rating,” the company said.
Pre-orders are being accepted, with deliveries expected to begin in the fourth quarter following completion of certification.
Sunoyster Systems is based in Munich, Germany, and was founded in 2011. In 2022, it also launched a concentrating solar power system for building applications.
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