ENERGY YIELD MEASUREMENTS AT SUPSI - IMPORTANCE OF DATA QUALITY CONTROL AND ITS INFLUENCE ON kWh/Wp INTER-COMPARISON

Friesen, Gabi and Strepparava, Davide and Meoli, Ronny and Domin, E and Chianese, Domenico (2011) ENERGY YIELD MEASUREMENTS AT SUPSI - IMPORTANCE OF DATA QUALITY CONTROL AND ITS INFLUENCE ON kWh/Wp INTER-COMPARISON. UNSPECIFIED. In: 26th European PV Solar Energy Conference.

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Abstract

The Institute for Applied Sustainability to the Built Environment (ISAAC) of the University of Applied Sciences and Arts of Southern Switzerland (SUPSI) has over twenty years of experience in the field of PV module testing. Single PV modules are tested outdoor and indoor with the aim to assess their quality and reliability in terms of power, energy output and stability. To achieve a high accuracy in delivered results, improved data quality control and new data analysis features have been implemented at SUPSI over the last years. The outdoor measurements are carried out with Maximum-Power-Point-Tracker's (MPPT3000), whereas all indoor measurements with a class A+ solar simulator. The MPPT3000 system allows customized measurements of all module I-V parameters as well as module and ambient temperatures and irradiance. All data undergoes an automatic quality control, which facilitates data analysis and improves energy yield comparisons. This contribution reports on the implementation of these quality control activities. The paper will focus on the detection of errors like e.g. shading, missing data, MPPT tracking problems and drift of sensors and their influence on the final performance ratio and kWh/Wp inter-comparison.

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