As the PV market develops, it becomes increasingly important to ensure high quality, reliable PV systems are provided to a wide range of users. The achievement and maintenance of high performance requires an understanding and quantification of system losses across the operating period, so that the maximum output is achieved over the system lifetime. This in turn requires the measurement and analysis of system performance, according to the needs of the system and the system user. This paper discusses the updating of the European PV monitoring guidelines, within the EC project PERFORMANCE, to provide a framework for the monitoring of the full range of systems now available and to accommodate advances in technology (both, PV-system- and Monitoring ICT -technologies) in the last decade. The approach and agreed structure to the construction and delivery of the new, modular guidelines is described.
