IEC 60904-1-2020 pdf free download – Photovoltaic devices – Part 1: Measurement of photovoltaic current-voltage characteristics
This part of lEC 60904 describes procedures for the measurement of current-voltagecharacteristics ( I-V curves) of photovoltaic (PV) devices in natural or simulated sunlight. These procedures are applicable to a single PV solar cell, a sub-assembly of PV solar cells, or a Pvmodule.They are applicable to single-junction mono-facial PV devices. For other device types,reference is made to the respective documents,in particular for multi-junction devices toIEC 60904-1-1 and for bifacial devices to IEC TS 60904-1-2.Additionally informative annexes
are provided concerning area measurement of PV devices (Annex A),PV devices withcapacitance(Annex B), measurement of dark current-voltage characteristics (dark1-V curves)(Annex C) and effects of spatial non-uniformity of irradiance (Annex D).
NOTEThe methods provided in this document can also be used as guidance for taking I-v curves of PV arrays. Foron-site measurement refer to lEC 61829.
This document is applicable to non-concentrating PV devices for use in terrestrial environments,with reference to (usually but not exclusively) the global reference spectral irradiance AM1.5defined in IEC 60904-3. It may also be applicable to PV devices for use under concentratedirradiation if the application uses direct sunlight and reference is instead made to the directreference spectral irradiance AM1.5d in lEC 60904-3.
The purposes of this document are to lay down basic requirements for the measurement ofI-Vcurves of PV devices, to define procedures for different measuring techniques in use and toshow practices for minimising measurement uncertainty. lt is applicable to the measurement of
I-v curves in general. I-V measurements can have various purposes, such as calibration (i.e.traceable measurement with stated uncertainty, usually performed at standard test conditions)
of a PV device under test against a reference device, performance measurement under various conditions (e.g. for device temperature and irradiance) such as those required by IEC 60891(for determination of temperature coefficients or internal series resistance), by lIEC 61853-1(power rating of PV devices) or by IEC 60904-10 (for determination”of outputs lineardependence and linearity with respect to a particular test parameter). I-V measurements arealso important in industrial environments such as PV module production facilities, and for testing in the field. Further guidance on 1-V measurements in production facilities is provided inIEC TR60904-14.
The actual requirements (e.g. for the class of solar simulator) depend on the end-use. Otherstandards referring to iEc 60904-1 can stipulate specific requirements. Where thoserequirements are in conflict with this document, the specific requirements take precedence.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies.
For undated’references,the latestedition of the referenced document (including anyamendments) applies.
IEC 60891，Photovoltaic devices – Procedures for temperature and irradiance corrections tomeasured l-V characteristics
IEC 60904-2,Photovoltaic devices- Part 2: Requirements for reference devices
IEC 60904-3, Photovoltaic devices – Part 3: Measurement principles for terrestrial photovoltaic (PV) solar devices with reference spectral irradiance data
IEC 60904-4, Photovoltaic devices – Part 4: Photovoltaic reference devices – Procedures for establishing calibration traceability
IEC 60904-5, Photovoltaic devices – Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method
IEC 60904-7, Photovoltaic devices – Part 7: Computation of the spectral mismatch correction for measurements of photovoltaic devices
IEC 60904-9, Photovoltaic devices – Part 9: Solar simulator performance requirements
IEC 60904-10, Photovoltaic devices – Part 10: Methods of linearity measurement.IEC 60904-1 pdf download.