Accelerated Testing and Modeling of Potential-Induced Degradation as a Function of Temperature and Relative Humidity

Peter Hacke, Sergiu Spataru, Kent Terwilliger, Greg Perrin, Sarah Kurtz, John Wohlgemuth

Publikation: Bidrag til tidsskriftKonferenceartikel i tidsskriftForskningpeer review

50 Citationer (Scopus)


An acceleration model based on the Peck equation was applied to power performance of crystalline silicon cell modules as a function of time and of temperature and humidity, which are the two main environmental stress factors that promote potential-induced degradation (PID). This model was derived from module power degradation data obtained semicontinuously and statistically by in-situ dark current–voltage measurements in an environmental chamber. The modeling enables prediction of degradation rates and times as functions of temperature and humidity. Power degradation could be modeled linearly as a function of time to the second power; additionally, we found that the quantity of electric charge transferred from the active cell circuit to ground during the stress test is approximately linear with time. Therefore, the power loss could be linearized as a function of coulombs squared. With this result, we observed that when the module face was completely grounded with a condensed phase conductor, leakage current exceeded the anticipated corresponding degradation rate relative to the other tests performed in damp heat.
TidsskriftI E E E Journal of Photovoltaics
Udgave nummer6
Sider (fra-til)1549 - 1553
Antal sider5
StatusUdgivet - nov. 2015
Begivenhed42nd IEEE Photovoltaic Specialists Conference - New Orleans, LA, USA
Varighed: 14 jun. 201519 jun. 2015
Konferencens nummer: 42


Konference42nd IEEE Photovoltaic Specialists Conference
ByNew Orleans, LA

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