The rapid emergence of new PV technologies such as bifacial has in some cases outpaced the evolution of suitable technical and regulatory specifications. The occurrence hotspots in non-shaded areas of half-cell bifacial solar modules highlights the need for a rethink of international standards, write Sergio Suárez, Jose María Álvarez, Daniel Villoslada, Ignacio Fernández, Sofía Rodríguez and Gustavo Navas
