201919th International Congress of Metrology
|Number of page(s)||11|
|Section||Energy Mix / Mix Energétique|
|Published online||23 September 2019|
Uncertainty calculation of indoor and outdoor performance measurements for PV modules
Univ Grenoble Alpes, CEA, LITEN, 17 rue des martyrs 38000 Grenoble, France
2 Univ Grenoble Alpes, CEA, LITEN, DTS, INES, 50 avenue du Lac Léman, F-73375 Le Bourget-du-Lac, France
* Corresponding author: firstname.lastname@example.org
Since uncertainties are often overlooked, this analysis highlights why considering uncertainties on PV power or efficiency values is crucial in order to compare published values for different PV technologies. Following the International Energy Agency Report on “Uncertainties in PV System Yield predictions and Assessments” and European FP7 Sophia project, the state of the art of outdoor and indoor uncertainty calculations on PV modules performances is reviewed. Calculation tools are compared and discussed in order to identify the most relevant one. Indoor measurements are based on instantaneous measurements with a dedicated set up: a solar simulator, called “flash-test”. The simulated conditions are close to the standard tests conditions with a stable irradiance, AMG1.5 spectrum and at 25 °C ± 1 °C, which are more stable than outdoor tests. Outdoor measurements are taken performed on variable time periods. Variations over months are commonly observed within ± 5 % that is why averaging on long periods looks relevant to reduce the standard deviation down to 1.3 %. Outdoor measurements are performed close to Chambery in France, under a soft alpine climate, with current-voltage curve tracers. Indoor and outdoor values are finally compared and discussed.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.