Visited yesterday without charging.
There are 2 different parkings in the area. The chargers are in the parking under the store.
The opening hours of the parking aren't clear. Above the entrance and in M-CHARGE app it says 8-20h Mon-Sam, which must be the store opening hours.
But on the price table it says "Gebührenpflichtige Zeiten Montag bis Samstag 7h-21h" and "Sonntag Parkgebühren analog Park im Grünen". There's also a large sign next to the door with the prices that says the same but with "Sonntag und Feiertage". Nowhere does it mention nights.
"Park im Grünen" is the other parking next door, but I didn't go check their tariffs.
If the parking is open outside shopping hours I'm not sure where you exit on foot. The stairs and lift don't lead directly in the store, but they still have curtains to close off the front porch where they emerge.
I wonder how much the abandoned drink can on top of the charger restricts charging speed due to obstructing the cooling duct.