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).
Nowadays, there is a worldwide production capacity of about 5GW of thin-film module technology. In total, an estimated cumulative installed capacity of 15 to 24GW exists (5-8% of 300GW installed
worldwide in 2016). But how serious is the threat of PID in this thin-film fleet?
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.
In recent years, potential-induced degradation (PID) has been recognized as a serious reliability issue for large PV systems, potentially causing efficiency losses of more than 90%, and even failures [1–4]. Such large decreases in efficiency may require the modules in the system to be replaced after just a few years’ operation. This has motivated a substantial research effort in the PV community, leading to a better understanding of the phenomenon, as well as to a range of mitigation strategies. A recent publication by Luo et al. gives a comprehensive overview of this research .
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.