4. 1 PV Module Design, Manufacture, Performance and Reliability
Summary / Abstract:
The need of monitoring the quality of PV modules comes from the will of assessing their degradation in real outdoor conditions thanks to accelerated ageing . Mechanical stresses are one of the PV modules stressors. In order to monitor the implied modes of degradation of PV modules, electroluminescence and ash testing are generally used . However, these measurements are-time consuming because an accurate follow-up needs numerous handling of modules. Degradations could be evaluated more eciently and accurately than with the usual IV and EL thanks to in situ DIV monitoring  and lock-in thermography imaging the failures detected by the in situ monitoring. On the one hand, in situ electrical monitoring would make it possible to avoid overly regular measurements, by signalling a change in the module's electrical characteristics. On the other hand, the use of alternative methods to electroluminescence, such as lock-in thermography (LIT), would make it possible to quantify and locate these electrical failures more precisely.