The Aerial PV Inspection GmbH and the Institute for Solar Energy Research Hamelin (ISFH) team up to develop LIEL – a new electroluminescence (EL) inspection method to analyse PV field systems and to identify failures in PV modules. In contrast to the common technique no electrical current needs to be induced in the PV modules which decreases the measurement effort drastically. The joint research project (FKZ KK5291101BS1) is funded by the ZIM initiative of the Federal Ministry for Economic Affairs and Climate Action. The LIEL method induces contact-free the electrical current using an artificial light source. Therefore, the inspection process of large PV systems is independent of the level of sunshine and can be carried out in a fast and cheap way. The contact-free technique allows to develop automated inspection systems.