Annual energy losses due to partial shading in PV modules with cut wafer-based Si solar cells
ID Brecl, Kristijan (Author), ID Bokalič, Matevž (Author), ID Topič, Marko (Author)

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To further improve the efficiency of the wafer-based silicon photovoltaic (PV) module, producers are introducing new module designs with cut-cells. Since smaller solar cells might be affected by partial shading even more and earlier than full-size cells, the energy performance simulations of partially shaded modules are crucial. A detailed shading analyses of partially shaded modules with different cut cell designs are presented not only on a single case scenario but on annual energy yield simulations using Spice, where a shading scenario over the whole module by the use of a new 3D shading horizon profile of selected shading objects is calculated. The annual simulations reveal that regardless the module design almost all cells in the module are confronted by reverse bias, which can deteriorate the module performance significantly. Simulation results with three different shading objects on five different module topologies at five locations showed that the best cut-cell module design depends strongly by the micro location and shading objects; however, in general the string of solar cells connected in series should be aligned with the shading shape around noontime as much as possible. A comprehensive annual energy performance evaluation of partially shaded cut-cell modules revealed; that with a correct cell layout of cut-cells in a PV module, the shading losses can be reduced by 30–50% if comparing to the standard PV module design.

Keywords:PV module, shading, cut cells, energy balance models, losses
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FE - Faculty of Electrical Engineering
Publication status:Published
Publication version:Version of Record
Number of pages:Str. 195-203
Numbering:Vol. 168
PID:20.500.12556/RUL-124062 This link opens in a new window
ISSN on article:0960-1481
DOI:10.1016/j.renene.2020.12.059 This link opens in a new window
COBISS.SI-ID:44146435 This link opens in a new window
Publication date in RUL:23.12.2020
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Record is a part of a journal

Title:Renewable energy
Shortened title:Renew. energy
COBISS.SI-ID:8704261 This link opens in a new window


License:CC BY 4.0, Creative Commons Attribution 4.0 International
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Keywords:PV moduli, senčenje, rezane celice, energijski modeli, izgube


Funder:ARRS - Slovenian Research Agency
Project number:P2-0197
Name:Fotovoltaika in elektronika

Funder:EC - European Commission
Funding programme:H2020
Project number:857793
Name:High-performance low-cost modules with excellent environmental profiles for a competitive EU PV manufacturing industry

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