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Traceable calibration of photovoltaic reference cells using natural sunlight

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To calibrate the electrical performance of photovoltaic (PV) modules, the incident irradiance of the natural or simulated sunlight is measured by PV reference cells. This measurement is the most difficult part concerning traceability and contributes significantly to overall measurement uncertainty. At the European Solar Test Installation (ESTI) PV reference cells are calibrated traceably to the World Radiometric Reference (WRR) using natural sunlight. These calibrations are shown to be fully consistent with other methods directly traceable to SI units. Based on the combined calibration results for a set of PV reference cells, the World PV Scale (WPVS) is established. This provides a useful means for routine calibration of other PV devices.
2017-06-21
NEWRAD
JRC105806
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