Many of the bifacial modules now offered by PV manufacturers employing bifacial passivated emitter and rear cell (PERC+) technology, making them vulnerable to rear-side potential-induced degradation, in addition to the conventional front-side shunting type (PID-s). Kai Sporleder, Volker Naumann, Stephan Großer, Marko Turek and Christian Hagendorf of the Fraunhofer Centre for Silicon Photovoltaics report on new testing methods designed to quantify the expected power losses of bifacial PERC+ modules in the field
Potential-induced degradation (PID) is still one of the main reasons for unpredictable power losses in PV power plants. Volker Naumann, Otwin Breitenstein, Klemens Ilse, Matthias Pander, Kai Sporleder and Christian Hagendorf of Fraunhofer CSP examine how the PID susceptibility of PV modules is influenced by environmental stress. It is found that PID may develop in originally PID-resistant modules after a period of one to three years of unsuspicious operation, depending on climatic conditions
When we visit conferences and industrial players, we are very often surprised at how many responsible scientists for PERC production have never heard about the severe degradation effects that PERC devices can show – in particular when talking about LeTID (Light and elevated Temperature Induced Degradation) alias Carrier Induced Degradation (CID).
India-based PV module and materials specialist RenewSys has has become the first Indian company to receive UL approval and commercialize its Polyolefin Elastomeric (POE) encapsulant. ‘CONSERV E 360 (POE)’, has been specially developed to combine the advantages of TPO as well to provide an effective solution to Potential Induced Degradation (PID).
Leading ‘Silicon Module Super League’ (SMSL) member JinkoSolar has raised its Potential Induced Degradation (PID) resistance test metrics for its standard 1,000V and its 1,500V solar modules, using an extended IEC62804 standard.
Major PV inverter manufacturer Sungrow Power Supply Co is building a 150MW floating solar plant in China in close proximity to its recently completed 40MW floating PV project - currently the world’s largest.
After experiencing their own problems with potential induced degradation (PID), Belgium-based Edison Energy took matters into its own hands and developed the Pidbull solution in partnership with imec. Now it sells Pidbull to anyone experiencing issues with PID. As managing director Davy Verheyden explains, it is a problem solar asset owners cannot afford to ignore.