If you want to have a solar system installed on or on a monument, you need a permit under monument protection law. In principle, however, there is a legal right to this, which is not at the discretion of the monument authority. For example, it should be checked whether an outbuilding is better suited for a solar system. As a rule, solar systems are always permitted if they cannot be seen from the outside.
North Rhine-Westphalia: NRW relaxes rules for solar systems on monuments
Düsseldorf (dpa / lnw) - Owners of listed buildings will be able to have solar systems built there more easily in the future.