Potential-induced degradation stands for the voltage-related degradation in power in crystalline photovoltaic modules cause by so-called leakage currents. In case of high system voltages in the region of 1,000 Volts, there may be leakage current in the module, i.e. charge carriers flow through the embedded material and the backside film. This may lead to electrochemical corrosion and thus, causes loss of power in the module.
The effect occurs particularly at high temperatures and high levels of atmospheric humidity it may cause loss in power of up to 80 %.
Our measuremants showed 100% no PID. Tested at J.v.G. Thoma laboratory.
Hans Thoma, Head of J.v.G. Thoma GmbH