Germany's Fraunhofer Institute for Solar Energy Systems ISE has set a new record for power conversion efficiency of its III-V germanium solar module, increasing it from 34.2% to 34.4% using "shingle-matrix" technology and space-grade solar cells. This achievement was made possible by adapting triple-junction solar cell technology to the terrestrial solar spectrum and utilizing anti-reflective front glass structures supplied by Temicon. The key factor in this breakthrough was the use of shingle-matrix technology for interconnecting the solar cells, eliminating solder-coated copper ribbons, reducing shading, and increasing active area utilization. In addition, in July 2025, Fraunhofer ISE achieved 40% efficiency for an indoor III-V solar cell based on an indium gallium phosphide absorber, showcasing their commitment to advancing solar energy technology for a more sustainable future.