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Received: 19 March 2020 Accepted: 13 May 2020 I-V curves allow to estimate the performance of photovoltaic modules and strings. On site, I-V curves are usually obtained under operating conditions (OPCs), i.e. at variable solar radiation and module temperature. Thus, OPC curves must be translated into standard test conditions (STCs), at a global irradiance of 1000 W/m and a module temperature of 25 °C. The translation allows to estimate the deviation between the power of the examined module and that declared by the manufacturer. A possible translation procedure requires two correction parameters: Rs’, the internal series resistance, and k’, the corresponding temperature coefficient. The aim of this work is to estimate the correction parameters using calculation methods based on an error minimization routine, rather than carrying out specific experimental tests such as those proposed by IEC 60891. A set of brand-new photovoltaic modules was therefore experimentally characterized determining their I-V curves by means of an indoor solar flash test device based on a class A+ AM 1.5 solar simulator. Using the OPC and STC I-V curves as a dataset, the minimization routine allowed to estimate the correction parameters of the photovoltaic modules being considered. The procedure should be also effective using real, on-site I-V data.

Use of an Indoor Solar Flash Test Device to Estimate Temperature and Irradiance Corrections of Photovoltaic Modules