The finished guest book PV module.
Director of ISFH Prof. Dr.-Ing. Rolf Brendel (right) explains the idea of the guest book PV module to Dr. Georg Menzen (left) of the BMWi.
An ISFH employee signs the white backsheet.
Signatures on the backsheet and placeholders for the solar cells.

At our 30th anniversary celebration on 31.08.2017 we asked our guests to sign the white backsheet of a PV module. This was laminated together with artfully arranged solar cell developments of ISFH from the past ten years and is now standing as a lasting memento of this lovely celebration in our foyer.