Inferring the Performance Ratio of PV systems distributed in an region: a real-case study in South Tyrol

This paper presents a methodology to infer the monthly series of Performance Ratio (PR) and the tilt & orientation angles of PV systems installed in a certain extended area. It is particularly useful in a context of low-information, especially when irradiance data is not available for the sites, and it only requires the knowledge of produced energy, location and nominal power of each system of the fleet. Possible applications of this methodology are: regional survey and statistical analysis of distributed plants performance on monthly time scale; implementation of physical model of plant performance (requiring plant characteristic), to be used for nowcast and forecast application; statistical information on technology performance loss rate.