IEA PVPS Task 13 focuses on strengthening international collaboration to improve the reliability and performance of photovoltaic (PV) systems. The Task collects, analyzes, and disseminates information on the technical performance, degradation, and failure modes of PV systems, providing a foundation for their technical assessment and developing practical recommendations to enhance system performance and longevity. The Swiss consortium - comprising SUPSI, CSEM, BFH, OST, and ZHAW - contributes by sharing the latest results from Swiss R&D projects and integrating national expertise into the international dialogue. The dissemination activities aim industry, utilities, and policymakers to remain aligned with international best practices, thereby strengthening the competitiveness of Swiss PV technologies in global market.