Finally, when speaking about calibration of modules, the following must be considered: Calibration seeks to determine the electrical module parameters, e. g. to use this module as a reference for further measurement tasks.
(3) The expanded uncertainty of the calibration value provided by PTB is 0.6% (k=2) . Currently, this is the worldwide lowest uncertainty for reference cell calibration. The maximum drift is considered to be ±0.2%. This is based on our experience from yearly recalibrations at PTB.
Fig. 1. Traceability chain of CalLab PV Modules with regard to the calibration of measurement equipment (boxes) and traceability of measured quantities (italic). Daily quality assurance measurements at the beginning and the end of each working day, performed on one module per system.
Long-term reproducibility for module power in CalLab PV Modules since 2010. For 9 modules (6 before 2011) used for 3-weekly quality assurance measurements, the deviation in percent from module average is depicted vs. time (left). The distribution of this deviation for all modules and measurements is displayed on the right.
Our solar PV systems and energy storage products are engineered for reliability, safety, and efficient deployment. All systems include comprehensive monitoring and control systems with remote management capabilities.
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