Visited today without charging.
The parking is indicated as reserved for restaurant and camping customers, but the 2 charging spots in green might be open to everyone because they are clearly painted, have their own parking sign max 4h and a sign with a list of "sponsors". The sign also mentions "Strom aus der Fotovoltaikanlage hinter dem Restaurant Talhaus".
Charger 201519 is on the left, 201523 on the right.