There is no better method of predicting photovoltaic (PV) array performance than exposing it to real-life conditions in the field. Although laboratory tests can accurately determine PV cell characteristics, real-time monitoring of a photovoltaic array in the field can boost confidence in product reliability and overall performance.
The many effects of a real-world environment, such as change in irradiance, temperature, and other external factors, can make monitoring and analysis of PV installations a daunting task for those accustomed to a controlled environment.
A fast, accurate, and carefully synchronized test approach is required to obtain meaningful data in ever-changing conditions like those described above. By obtaining Voltage (V) and Current (I) readings at different PV loading levels, a separate I-V curve can be generated for each the array, the string (series of panels), and the individual panel, required for adequate characterization in the field.
Measurements collected from I-V data can also be used to calculate the array’s Maximum Power Point (MPP) at different instances throughout the day, providing a key indicator of the installation’s performance.
A proposed test/monitoring system for field applications is described and can be read by clicking the link below.
More On Testing Array Performance
The Chroma I-V Characterization soft panel provides users with valuable information about their photovoltaic cells or panels. The application can generate I-V curves and report key elements such as Isc, Voc, Pmp, Vmp, Imp, Fill Factor, Efficiency, Rs, and Rsh. Tab delimited text reports for both summary and I-V data points are made available and can be used by other applications for post-processing. Various hardware and software configuration options allow users to adapt and customize the soft panel to best fit their PV cell/panel. This soft panel makes use of the internal measurement and current range capabilities of Chroma’s 63600 series DC Loads, ensuring fast and accurate PV characterizing. These softpanels are now available.
Our experienced sales engineers can help you select the right instrument for your application. Contact Chroma Systems Solutions today!
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