Potential-induced degradation (PID) of bifacial PV modules incorporating PERC+ technology


By Kai Sporleder, Volker Naumann, Stephan Großer, Marko Turek & Christian Hagendorf, Fraunhofer Center for Silicon Photovoltaics CSP, Halle, Germany

The market share of bifacial solar modules is rising, because of the additional power yields of up to 20% per year, which reduce the levelized cost of electricity (LCOE). Many manufacturers have bifacial PV modules in their portfolios, with a majority of them employing bifacial passivated emitter and rear cell (PERC+) technology. In this paper, it is shown from the results of studies that rear-side-related potential-induced degradation (PID) effects can occur in addition to the conventional front-side shunting type (PID-s).

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