Fegen has the uniqueness of being worldwide the only PVT manufacturer holding an internationally valid and recognized certificate, that gives the ability to safely combine whichever UL listed PV panel with Fegen RFK, resulting in a very rapid and toolless way, in a light, thin, very efficient and absolutely safe, PVT panel.

Besides, being this way globally the only product suitable for safely retrofitting PV installations to PVT ones, this certified integration surpasses the obstacle of the 10% electric power tolerance between certified and used PVT panel in installations, which practically results in either using electrically inefficient PVT panels in an installation, or making an installation itself non certified for safety, thus, not capable to be properly insured.