A solar installation includes at least one solar module. The at least one solar module includes a cover plate and a housing box. The housing box includes housing walls, a frame construction including a substantially L-shaped support profile, the support profile including a transverse leg disposed edge-parallel on a bottom side of the cover plate with a seal interposed therebetween and a longitudinal leg connected to the housing wall. A detent device has at least one upper detent element and one lower detent element for fixing the cover plate on the housing box. A spring-loaded mounting includes at least two spring elements for mounting the cover plate on the housing walls, via the at least two spring elements. The at least two spring elements have a predetermined vertical stroke and are configured to generate a restoring force.