This paper originally proposes a photovoltaic (PV) array model for PV system with commercial PV modules. This novel PV array model was hierarchically developed by directly calling one of the built-in PV models that have well-verified accuracy and sufficient confidence. Based on both thermal and electrical characteristics of commercial PV modules available from the manufacturer datasheet, the hierarchical PV model for commercial PV modules is implemented in the MATLAB/Simulink environment. Both rear-surface temperatures and electrical characteristics of a commercially available PV array are evaluated through in-the-field experiments where not only weather conditions but PV operating parameters can be acquired by a LabVIEW-based measurement system. Comparing to the experimental results, the proposed PV array model is validated and the results illustrate a close agreement between simulation and measurement. This work features the hierarchical development of PV model for commercial PV devices with sufficient accuracy confidence.

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