CalLab PV Modules Increases Measurement Precision to a Record 1.3 Percent
“We regularly carry out round robin tests with the world’s best accredited calibration laboratories. Germany’s national accreditation body DAkks has checked our measurement uncertainty analysis and verified the 1.3 percent,” explains Frank Neuberger, group leader of CalLab PV Modules. This backs up the very good standing that Fraunhofer ISE holds in measurement precision worldwide. Carefull tracing of the current-voltage curves as well as spectral corrections were the focus of the researchers’ optimizations.
The calibration laboratory for PV modules at Fraunhofer ISE has the particular advantage of being able to combine highest precision with the capability of measuring large batches quickly. On the one hand, customers can be assured that their data is handled with the utmost confidentiality. On the other hand, they also profit from the research environment and the newest research results of the institute. CalLab PV Modules is the only calibration laboratory worldwide that is equipped to measure bifacial modules on both sides simultaneously with the highest precision. A new test stand has been specially developed for this purpose. This new variant of solar electricity production uses solar energy incident on the front and rear side of the module.
Offer and Data
CalLab PV Modules is an accredited calibration and test laboratory according to ISO/IEC 17025. All types of PV module technologies can be characterized: crystalline silicon, all thin film modules, concentrator modules, III-V materials, dye solar modules, etc. Maximum module dimensions are 3x3 m², maximum short circuit current is 20 amperes and the maximum open circuit voltage is 250 volts. Measurements may also be made under conditions other than the standard test conditions (STC), especially under lower irradiation, different temperature and non-normal incident light. Before the measurements, the module is properly stabilized which produces results with high reproducibility.
Calibration means comparing something to a reference. For scales, the calibration offices guarantee the correct display values. For solar modules, the calibration laboratories constantly control their equipment using copies of the highly precise reference cells of the national physical laboratories.
SNEC PV POWER EXPO
Meet our experts from April 19-21 at the International Photovoltaic Power Generation Conference & Exhibition (SNEC PV POWER EXPO) Shanghai/China at booth W5-525.