Trust But Verify: Procedures to Achieve Accurate Efficiency Measurements for All Photovoltaic Technologies

    Research output: Contribution to conferencePaper

    Abstract

    The measurement of the photovoltaic (PV) performance with respect to reference conditions requires measuring the performance with respect to a given tabular reference spectrum, junction temperature, and total irradiance. This paper discusses the procedures implemented by NREL's PV Cell and Module Performance Characterization Group to achieve the lowest practical uncertainty. This paper describesthe process of trusting and verifying software, hardware, calibrations, procedures, and results. As an ISO 17025 accredited calibration facility, the quality system that is in place is designed to assure customers that the results are valid within specified uncertainty limits and are traceable. The process of trusting claims but desiring an independent verification permeates the PV business andsociety.
    Original languageAmerican English
    Number of pages7
    StatePublished - 2005
    Event31st IEEE Photovoltaics Specialists Conference and Exhibition - Lake Buena Vista, Florida
    Duration: 3 Jan 20057 Jan 2005

    Conference

    Conference31st IEEE Photovoltaics Specialists Conference and Exhibition
    CityLake Buena Vista, Florida
    Period3/01/057/01/05

    NREL Publication Number

    • NREL/CP-520-36527

    Keywords

    • efficiency measurements
    • junction temperature
    • performance
    • PV
    • tabular reference spectrum
    • total irradiance
    • trusting and verifying software

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