I tried to visit yesterday (Sunday) but couldn't get in.
The Swisscharge app says the chargers are accessible 24/7, and on location I didn't see any parking opening hours indicated. There's an automatic door that did not open, no matter how many time I drove forward and backward. There's a pad to enter a code or a key but no call button so I couldn't get any help.
Above the keypad there was a text that seems to indicated that after 23h a key or code is required to enter.
I'll need to ask Energie360° if such a code is available for customers.