研究目的
Investigating the output power behavior of passivated emitter and rear cell photovoltaic modules during the early installation stage under the influence of light-induced degradation.
研究成果
The performance of PERC PV modules degrades immediately after outdoor exposure, with the extent and behavior of degradation differing by model and circuit conditions during exposure. Recovery of performance after LID is influenced by temperature and circuit conditions, with no recovery observed under MPPT conditions in the test period. Further research is needed to estimate power generation for PERC PV arrays under actual operating conditions.
研究不足
The study's test period was too short to determine the required duration for stabilization of PERC PV modules under actual operating conditions. Additionally, the behavior of degradation and recovery may vary with longer exposure times and different environmental conditions.
1：Experimental Design and Method Selection:
The study employed two models of commercial PERC PV modules exposed outdoors to investigate their power generation behavior under different circuit conditions (short-circuit, open-circuit, and MPPT by a power conditioner).
2：Sample Selection and Data Sources:
Two models of PERC PV modules from different manufacturers were used, with their performance evaluated under standard test conditions using a solar simulator and outdoors using an I–V analyzer.
3：List of Experimental Equipment and Materials:
Secondary standard pyranometer (model: SR20-T1, Hukseflux Thermal Sensors B.V.), solar simulator (model: PVS1222i-L, Nisshinbo Mechatronics Inc.), power conditioner, and PV analyzer (model: PVA01950, Nippon Kernel System Co., Ltd.).
4：Experimental Procedures and Operational Workflow:
Modules were exposed outdoors under different circuit conditions, with their performance periodically evaluated indoors under STC and outdoors under actual environmental conditions.
5：Data Analysis Methods:
Performance ratio corrected to that at 25°C (PRT=25) was used to evaluate the power generation of the PERC PV arrays, with data analyzed based on changes in Pmax, Isc, Voc, and FF.
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