Title: Evolution of measured module characteristics versus labelled module characteristics of crystalline silicon based PV modules
Authors: LOPEZ GARCIA JUANSAMPLE TONY
Citation: SOLAR ENERGY vol. 160 p. 252-259
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2018
JRC N°: JRC110522
ISSN: 0038-092X
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC110522
DOI: 10.1016/j.solener.2017.12.018
Type: Articles in periodicals and books
Abstract: This work outlines the evolution of measured module parameters (power Pmax, short circuit current Isc, open circuit voltage Voc) vs labelled module parameters of crystalline silicon PV modules over a number of decades at the European Solar Test Installation (ESTI) at Ispra, Italy. Manufacturers' tolerance in nameplate power has changed over the years with many claiming ±10% in the 80's and 90's. The declared tolerance over recent years has been reduced to ±5% then ±3% and today values of -0/+3 % are quite common. To know the declared tolerance of modules in an operational system is useful additional information when investigating the aging of PV systems, when the original module power may either be unknown or missing with the passage of decades. Therefore, researchers have often to rely on the labelled power for the starting point of the system. Measurements at the ESTI laboratory have been performed since the early 1980's. A comparison of those modules which incorporated either a nameplate (or an associated datasheet, flash report or online information) to their measured output parameters (Pmax, Isc and Voc) has been carried out. The impact of these differences from an economic point of view has been also analysed. This work presents some selected results from a set of 992 crystalline silicon based modules, extracted from various time periods from 1982 to 2014.
JRC Directorate:Energy, Transport and Climate

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