Visited on Friday without charging.
I wasn't sure what to find here because I couldn't find any picture of the location online. On openstreetmap it also looks like there's no building and possibly an outdoor parking, but that's not the case, there's a building there now.
The chargers are in the parking underneath building 15, labelled for Coop, Migros and the other venues of those buildings. The foot exit leads directly outside in the street.
It doesn't seem like there's any gate, and there are no closing times or tariffs posted. There is a ban sign only allowing parking for customers of customers of the businesses at 11a, 11b, 15, 17b, 17c on the white parking spots and only short parking on the spots designated as such. There's no mention of the green charging spots.