IEC 60904-10:2020 describes the procedures used to measure the dependence of any electrical parameter (Y) of a photovoltaic (PV) device with respect to a test parameter (X) and to determine the degree at which this dependence is close to an ideal linear (straight-line) function. It also gives guidance on how to consider deviations from the ideal linear dependence and in general on how to deal with non-linearities of PV device electrical parameters.
This third edition cancels and replaces the second edition published in 2009. This edition includes the following significant technical changes with respect to the previous edition:
a. Modification of title.
b. Inclusion of an Introduction explanatory of the changes and the reasoning behind them.
c. Inclusion of a new Clause Terms and Definitions (Clause 3), with distinction between generic linear dependence and linear dependence of short-circuit current versus irradiance (linearity).
d. Explicit definition of equivalent sample (Clause 4).
e. Technical revision of the apparatus (Clause 5), of the measurement procedures (Clause 6 to Clause 8) and of the data analysis (Clause 9), with separation of the data analysis for a generic linear dependence from the data analysis specific to linearity (i.e. short-circuit current dependence on irradiance) assessment. Additionally, inclusion of impact of spectral effects on both linearity and linear dependence assessment.
f. Introduction of specific data analysis for two-lamp method, making it fully quantitative. Addition of extended version called N-lamp method.
g. Modification of the linearity assessment criterion with inclusion of a formula that can be used to correct the irradiance reading of a PV reference device for non-linearity of its short-circuit current versus irradiance. A linearity factor is specifically newly defined for this purpose.
h. Revision of the requirements for the report (Clause 10) in order to improve clearness about what information is always necessary and what is dependent on the procedure actually followed to measure the linear dependence, including the type of dependence measured (generic or linearity).
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EN 60904-1-1:2017 Photovoltaic devices - Part 1-1: Measurement of current-voltage characteristics of multi-junction photovoltaic (PV) devices
EN 60904-2:2015 Photovoltaic devices - Part 2: Requirements for photovoltaic reference devices
EN 60904-8-1:2017 Photovoltaic devices - Part 8-1: Measurement of spectral responsivity of multi-junction photovoltaic (PV) devices
EN 60904-1-1:2017 Photovoltaic devices - Part 1-1: Measurement of current-voltage characteristics of multi-junction photovoltaic (PV) devices
EN 60904-2:2015 Photovoltaic devices - Part 2: Requirements for photovoltaic reference devices
EN 60904-8-1:2017 Photovoltaic devices - Part 8-1: Measurement of spectral responsivity of multi-junction photovoltaic (PV) devices
EN 60904-8:2014 Photovoltaic devices - Part 8: Measurement of spectral responsivity of a photovoltaic (PV) device
EN 61215:1995 Crystalline silicon terrestrial photovoltaic (PV) modules - Design qualification and type approval
EN 61215:2005 Crystalline silicon terrestrial photovoltaic (PV) modules - Design qualification and type approval
EN IEC 60891:2021 Photovoltaic devices - Procedures for temperature and irradiance corrections to measured I-V characteristics
EN IEC 60904-1:2020 Photovoltaic devices - Part 1: Measurement of photovoltaic current-voltage characteristics
EN IEC 60904-2:2023 Photovoltaic devices - Part 2: Requirements for photovoltaic reference devices
EN IEC 60904-3:2019 Photovoltaic devices - Part 3: Measurement principles for terrestrial photovoltaic (PV) solar devices with reference spectral irradiance data
EN IEC 60904-7:2019 Photovoltaic devices - Part 7: Computation of the spectral mismatch correction for measurements of photovoltaic devices
EN IEC 60904-9:2020 Photovoltaic devices - Part 9: Classification of solar simulator characteristics
EN IEC 61724-1:2021 Photovoltaic system performance - Part 1: Monitoring
FprEN IEC 60891:2021 Photovoltaic devices - Procedures for temperature and irradiance corrections to measured I-V characteristics
FprEN IEC 61724-1:2021 Photovoltaic system performance - Part 1: Monitoring
IEC/TS 60904-1-2:2019
IEC/TS 61836:2016 Solar photovoltaic energy systems - Terms, definitions and symbols
ISO/TS 28037:2010 Determination and use of straight-line calibration functions
prEN IEC 60891:2020 Photovoltaic devices - Procedures for temperature and irradiance corrections to measured I-V characteristics
prEN IEC 61724-1:2020 Photovoltaic system performance - Part 1: Monitoring