ASTM WK22009

    New Test Method for Reporting Photovoltaic Non-Concentrator System Performance

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    Developed by Subcommittee: E44.09 | Committee E44 | Contact Staff Manager



    WK22009

    1. Scope

    1.1 This test method provides measurement and analysis procedures for determining the capacity of a specific photovoltaic system built in a particular place and in operation under natural sunlight. 1.2 This test method is used for the following purposes: 1.2.1 acceptance testing of newly installed photovoltaic systems. 1.2.2 reporting of dc or ac system performance 1.2.3 monitoring of photovoltaic system performance. 1.3 This method should not be used for: 1.3.1 testing of individual photovoltaic modules for comparison to nameplate power ratings 1.3.2 testing of individual photovoltaic modules or systems for comparison to other photovoltaic modules or systems 1.3.3 testing of photovoltaic systems for the purpose of comparing the performance of photovoltaic systems located in different places 1.4 In this Test Method, photovoltaic system power is reported with respect to a set of reporting conditions (RC) including: solar irradiance in the plane of the modules, ambient temperature, and wind speed (see 6, Reporting Conditions). Measurements under a variety of reporting conditions are allowed to facilitate testing and comparison of results. 1.5 This test method assumes that the solar cell temperature is directly influenced by ambient temperature and wind speed; if not the regression results may be less meaningful. 1.6 This test method is not applicable to concentrator photovoltaic systems; as an alternative, Test Method E 2527 should be considered for such systems.


    Keywords

    photovoltaics, systems, performance, reporting

    Rationale

    PV system integrators and purchasing agencies will use this standard for acceptance testing and long-term performance. This test methods avoids device temperature measurements, and reports actual performance levels.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    11-25-2008

    Technical Contact:

    Status:
    Approved