Depending on the potential a degradation effect of the module power can occur after a certain period of time. This so-called potential induced degradation (PID) only occurs when the frame is positively biased. The exposure of the solar modules to the hard environment conditions such as high temperature and humidity accelerates the power degradation. The potential difference between the frame and the cells results in a leakage current (charge transferred or polarization).

H. Singh is working in a leading solar power company in India the last three years. He is interested to work on the issues which degrade output power. Along with other staff members he is also working on cost cutting to make solar power affordable to everyone. He is a member of quality department of my company.