ASTM E948 - 09

    Standard Test Method for Electrical Performance of Photovoltaic Cells Using Reference Cells Under Simulated Sunlight

    Active Standard ASTM E948 | Developed by Subcommittee: E44.09

    Book of Standards Volume: 12.02


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    Significance and Use

    It is the intent of this test method to provide a recognized method for testing and reporting the electrical performance of photovoltaic cells.

    The test results may be used for comparison of cells among a group of similar cells or to compare diverse designs, such as different manufacturers' products. Repeated measurements of the same cell may be used to study changes in device performance.

    This test method determines the electrical performance of a cell based upon the output power at a single instant of time. It does not provide for integrating the output power over a given period of time and conditions to predict an energy output.

    This test method requires a reference cell calibrated with respect to an appropriate reference spectral irradiance distribution, such as Tables E 490, or G 173. It is the responsibility of the user to determine which reference spectral irradiance distribution is appropriate for a particular application.

    1. Scope

    1.1 This test method covers the determination of the electrical performance of a photovoltaic cell under simulated sunlight by means of a calibrated reference cell procedure.

    1.2 Electrical performance measurements are reported with respect to a select set of standard reporting conditions (SRC) (see Table 1) or to user-specified conditions.

    1.2.1 The SRC or user-specified conditions include the cell temperature, the total irradiance, and the reference spectral irradiance distribution.

    1.3 This test method is applicable only to photovoltaic cells with a linear response over the range of interest.

    1.4 The cell parameters determined by this test method apply only at the time of test, and imply no past or future performance level.

    1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

    TABLE 1 Standard Reporting Conditions

    Reference Spectral Irradiance
    Distribution
    Total Irradiance
    (Wm2)
    Temperature
    (°C)
    Tables G 173 Direct Normal1000 25
    Tables G 173 Hemispherical 1000 25
    Tables E 4901366.1 25


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E490 Standard Solar Constant and Zero Air Mass Solar Spectral Irradiance Tables

    E491 Practice for Solar Simulation for Thermal Balance Testing of Spacecraft

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    E772 Terminology of Solar Energy Conversion

    E927 Specification for Solar Simulation for Photovoltaic Testing

    E973 Test Method for Determination of the Spectral Mismatch Parameter Between a Photovoltaic Device and a Photovoltaic Reference Cell

    E1125 Test Method for Calibration of Primary Non-Concentrator Terrestrial Photovoltaic Reference Cells Using a Tabular Spectrum

    E1328 Terminology Relating to Photovoltaic Solar Energy Conversion

    E1362 Test Method for Calibration of Non-Concentrator Photovoltaic Secondary Reference Cells

    G173 Tables for Reference Solar Spectral Irradiances: Direct Normal and Hemispherical on 37 Tilted Surface


    ICS Code

    ICS Number Code 27.160 (Solar energy engineering)

    UNSPSC Code

    UNSPSC Code 32111701(Photovoltaic cells)


    Referencing This Standard

    DOI: 10.1520/E0948-09

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM E948-09, Standard Test Method for Electrical Performance of Photovoltaic Cells Using Reference Cells Under Simulated Sunlight, ASTM International, West Conshohocken, PA, 2009, www.astm.org

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