TY - JOUR A1 - Hüttl, Bernd A1 - Gottschalk, L. A1 - Schneider, S. A1 - Pflaum, D. A1 - Schulze, Achim T1 - Accurate Performance Rating of Photovoltaic Modules under Outdoor Test Conditions T2 - Solar Energy N2 - Outdoor performance analyses of photovoltaic modules can be advantageous compared to indoor investigations, as they take into account the influences of natural test conditions on the modules. However, such outdoor performance assessments usually suffer from poor accuracies due to undefined test conditions for the modules. This paper reports on a comprehensive concept for improved outdoor analysis which results in performance data with indoor laboratory precision. The approach delivers current-voltage characteristics for even more test conditions than required by the standard IEC 61853-1. Hence, curves of modules’ electrical parameters above irradiance can be deduced for any temperatures. The concept allows precise determination of temperature coefficients for user-defined irradiances taking into account outdoor effects like light-soaking or light-induced degradation. The calibration and measurement uncertainty of the presented outdoor analysis method is evaluated quantitatively. For the measurements an advanced outdoor set-up was used. KW - Photovoltaic systems, Metrology Y1 - 2019 UR - https://opus4.kobv.de/opus4-rosenheim/frontdoor/index/index/docId/1415 UR - https://doi.org/10.1016/j.solener.2018.12.002 VL - 2019 IS - 177 SP - 737 EP - 745 ER -