Solar PV Verification & Efficiency Testing
The outdoor installation, with constant exposure to extreme environmental conditions, can lead to a rapid deteriation of the modules as well as a sharp decrease in the performance of the whole photovoltaic installation.
The energy produced and the consequent economic benfit can be reduced considerably. It should be advised therefore to periodically check the installation comparing the performance of the modules as specified by their manufacturer. By measuring the module I-V feature and comparing it with the rating you can assess whether they are granting adequate performances, whether any decrease falls within the natural performance decay, or whether one or more modules are faulty.
In this case you can pinpoint the damaged module and promptly replace them.