An investigation on the uncertainty of fill factor

This study focuses on the fill factor (FF) measurement uncertainty contributing to the uncertainty in the labeling of the nominal maximum power (Pmax) of photovoltaic modules, which is determined under Standard Test Conditions (STC). Given that the price of these modules is tied to their Pmax, accur...

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Main Authors: Pavanello Diego, Sample Tony, Müllejans Harald
Format: Article
Language:English
Published: EDP Sciences 2025-01-01
Series:EPJ Photovoltaics
Subjects:
Online Access:https://www.epj-pv.org/articles/epjpv/full_html/2025/01/pv20240033/pv20240033.html
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author Pavanello Diego
Sample Tony
Müllejans Harald
author_facet Pavanello Diego
Sample Tony
Müllejans Harald
author_sort Pavanello Diego
collection DOAJ
description This study focuses on the fill factor (FF) measurement uncertainty contributing to the uncertainty in the labeling of the nominal maximum power (Pmax) of photovoltaic modules, which is determined under Standard Test Conditions (STC). Given that the price of these modules is tied to their Pmax, accurately quantifying the uncertainty of this measurement is crucial for ISO/IEC 17025 accredited laboratories. Adhering to the “Guide to the expression of uncertainty in measurement”, this work evaluates the uncertainty contribution of the Fill Factor (FF), a key parameter linking Pmax, the open-circuit voltage (Voc), and the short-circuit current (Isc). The analysis is based on data from three reference modules measured at the European Solar Test Installation (ESTI), part of the Joint Research Centre of the European Commission, since 1996. This data shows a reduction in FF uncertainty from approximately 0.6% to 0.3%, attributed to advancements in measurement technologies and techniques. Considering the goal of top calibration laboratories to measure Pmax with the lowest possible uncertainty, the improvement in FF uncertainty measurement is significant, ensuring more accurate labeling of photovoltaic modules.
format Article
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institution Kabale University
issn 2105-0716
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publishDate 2025-01-01
publisher EDP Sciences
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series EPJ Photovoltaics
spelling doaj-art-dd7aa03b8770424ba47a965b94e463832025-01-16T11:24:47ZengEDP SciencesEPJ Photovoltaics2105-07162025-01-0116210.1051/epjpv/2024042pv20240033An investigation on the uncertainty of fill factorPavanello Diego0https://orcid.org/0000-0001-6736-6670Sample Tony1https://orcid.org/0000-0002-7008-8752Müllejans Harald2https://orcid.org/0000-0002-3190-5107European Commission, Joint Research CentreEuropean Commission, Joint Research CentreEuropean Commission, Joint Research CentreThis study focuses on the fill factor (FF) measurement uncertainty contributing to the uncertainty in the labeling of the nominal maximum power (Pmax) of photovoltaic modules, which is determined under Standard Test Conditions (STC). Given that the price of these modules is tied to their Pmax, accurately quantifying the uncertainty of this measurement is crucial for ISO/IEC 17025 accredited laboratories. Adhering to the “Guide to the expression of uncertainty in measurement”, this work evaluates the uncertainty contribution of the Fill Factor (FF), a key parameter linking Pmax, the open-circuit voltage (Voc), and the short-circuit current (Isc). The analysis is based on data from three reference modules measured at the European Solar Test Installation (ESTI), part of the Joint Research Centre of the European Commission, since 1996. This data shows a reduction in FF uncertainty from approximately 0.6% to 0.3%, attributed to advancements in measurement technologies and techniques. Considering the goal of top calibration laboratories to measure Pmax with the lowest possible uncertainty, the improvement in FF uncertainty measurement is significant, ensuring more accurate labeling of photovoltaic modules.https://www.epj-pv.org/articles/epjpv/full_html/2025/01/pv20240033/pv20240033.htmlfill factorphotovoltaic module nominal powermeasurement uncertainty
spellingShingle Pavanello Diego
Sample Tony
Müllejans Harald
An investigation on the uncertainty of fill factor
EPJ Photovoltaics
fill factor
photovoltaic module nominal power
measurement uncertainty
title An investigation on the uncertainty of fill factor
title_full An investigation on the uncertainty of fill factor
title_fullStr An investigation on the uncertainty of fill factor
title_full_unstemmed An investigation on the uncertainty of fill factor
title_short An investigation on the uncertainty of fill factor
title_sort investigation on the uncertainty of fill factor
topic fill factor
photovoltaic module nominal power
measurement uncertainty
url https://www.epj-pv.org/articles/epjpv/full_html/2025/01/pv20240033/pv20240033.html
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