Understanding and Preventing PV Module Glass Fracture

This technical report examines the increasing issue of glass fracture in dual-glass photovoltaic (PV) modules, particularly focusing on low-energy fracture patterns that have emerged in recent years. The report outlines the historical context of glass breakage in solar installations, detailing how traditional high-energy fractures differ from the current low-energy fractures that are less visible and harder to diagnose. It discusses the implications of rising glass failure rates for various stakeholders in the solar industry, including manufacturers, developers, and investors. The report also presents findings from recent studies, including data from the National Renewable Energy Laboratory (NREL) and the Federal University of Santa Clara, which document the frequency and nature of glass fractures in the field. Furthermore, it highlights the engineering challenges posed by the trend towards larger and lighter PV modules, which may compromise durability and reliability. The report concludes with recommendations for a holistic industry response to mitigate these issues and prevent a crisis of confidence in solar technology.