The crack-age-test on offer from ADLER Solar is a new testing method for distinguishing older from recent micro cracks in crystalline PV modules.
Micro cracks in PV modules are caused by strong external effects. Hailstones can be a reason for them, or even pressure from a knee or foot. Depending on their characteristics, micro cracks can severely impair the performance capability of the affected cells in the PV module.
This new testing method from ADLER Solar enables insurers, for instance, to distinguish damages caused by a current severe weather event from older damages that may not have been insured or whose claims have already been forfeited and thus be able to more clearly assess a case of damage.
The new method also gives installation operators and installers an opportunity to distinguish older micro cracks that are not clearly due to the original event from recent events. One example of this is faulty handling of modules, which is still quite frequent in common practice, such as stepping on the module surface during maintenance or fault-clearing.
The test is offered as a stationary test at the ADLER Solar service centers in Bremen and Anzing. It is conducted step by step with the aid of a combination of the already established electroluminescence testing method and a new imaging process. Using a comparative assessment of the various images, a distinction can be made between recent micro cracks and any older micro cracks which may be present.