Kmetrics conducted an audit of monocrystalline, polycrystalline photovoltaic panels at 300KWp facilities in the area of Serres.

With the method of electroluminescence (EL test) PV modules with damaged cells due to hail were detected.

The consequence of the hail stress was the reduction of the power of the PV modules by 20% before the end of one year from the hailstorm. It is worth noting that visually there was no indication on the PV modules that they had suffered hail.