Design of shading‐ and hotspot‐resistant shingled modules
Clement, Carlos Enrico Singh, Jai Prakash Khoo, Yong Sheng Halm, Andreas Tune, Daniel Birgersson, Erik
Halm, Andreas
Tune, Daniel
Citations
Altmetric:
Alternative Title
Abstract
The shingled module has become an attractive interconnection architecture for its higher packing density and superior power generation. However, with longer string lengths and smaller cell areas, these modules are particularly susceptible to developing hotspots from shading elements. In this paper, a framework for the design of hotspot- and shading-resistant shingled modules is presented. An electrothermal model is developed and validated extensively through specially fabricated shingled modules that allow for string-level measurement and analysis. To investigate the relative influence of cell electrical characteristics on power loss and hotspot temperature, we perform a stochastic Monte Carlo simulation which reveals a greater sensitivity to parameters associated with the shaded cell's leakage current. A further study on cells with illumination-dependent Jleakage shows the detriment of this light-induced effect where higher hotspot temperatures can develop. Module-level parameters are also investigated where string length, number of parallel strings, and cell fraction are studied in relation to their impact on module power and hotspot response. Finally, these findings are condensed into a design matrix which defines the space in which module manufacturers may configure shingled modules such that hotspots will not exceed a set threshold temperature.
Keywords
shingled module, hotspot, shading, Monte Carlo simulation
Source Title
Progress in Photovoltaics: Research and Applications
Publisher
Wiley
Series/Report No.
Collections
Rights
Date
2021-12-01
DOI
10.1002/pip.3507
Type
Article