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Price-Bifaciality Relationship of Bifacial Modules in Vertical East-West Oriented PV Systems
L. Bodlak, H. Hernandez, J. Bierbaum, J. Kang, S. Nold, R. Preu
Bifacial, Economic Analysis, PV System, LCOE, Vertical Installation
PV Economics, Markets and Policies
Subtopic: PV Economics and Markets
Event: 35th European Photovoltaic Solar Energy Conference and Exhibition
Session: 7DO.3.5
2134 - 2137
ISBN: 3-936338-50-7
Paper DOI: 10.4229/35thEUPVSEC20182018-7DO.3.5
0,00 EUR
Document(s): paper


Bifacial vertical east west orientated PV systems (bifiVEW) are a new approach in PV system application and seem to have a promising future. This is a technology that can provide an increased energy yield compared to conventional PV systems, as well as a shift of peak production from one at noon to two peaks in the morning and in the afternoon. The latter can lead to a more balanced electricity yield throughout the day and therefore allows a better integration of solar energy into the grid. As with this vertical east west orientated mounting configuration, the solar irradiation hits both module sides with almost similar quantity. Thus, a high module bifaciality rate is crucial. Currently, above 80% bifaciality rates are only commercially available with high efficient n-Type Silicon Heterojunction (SHJ) and Passivated Emitter and Rear (n-PERT) technologies, having generally a significantly higher module price than e.g. bifacial PERC (Passivated Emitter and Rear Cell) technologies. The presented work analyzes modules’ price-bifaciality relationship, by investigating the bifaciality rate to the module watt peak price, with respect to the achieved LCOE (Levelized cost of electricity) in BifiVEW applications. The results show that for a BifiVEW PV system located in southern Germany, a difference in module bifaciality of 20%abs allows for a higher module price of up to 6.5 or 9.5 €ct/Wp for LCOE of 4 or 6 €ct(kWh, respectively. The relation between a higher percentage of bifaciality and an increased energy gain allows more efficient modules to be more expensive, the rate of this tradeoff is calculated and discussed in this report.