Visited yesterday without charging. There are 6 parking spaces marked for charging, 2 are for the ABB Terra 53, which is networked through MOVE. The 4 other spots are AC and don't have any text on them.
There's no clear indication on what is open to the public. The area is forbidden parking except for tenants and visitors, but I couldn't read the entire sign because there's a sticker covering part of the text. I expect the MOVE charger is open to all. On GoingElectric it says only the triple-charger is open to the public, and the others are private, but I don't know how outdated this description is. Last update was 2022.
In the past the Terra 53 charger used to be free. The earlier reference to the charger I can find is the entry and pictures on GoingElectric from June 2015. The charger has been visible on IchTankeStrom as a MOVE station from 2021-04-15, but the live data wasn't very reliable. The first "available" status was visible on 2021-08-07 but the other connectors had disappeared and only came back later. On Chargemap there isn't anybody talking about paid charging. There's a comment from November 2021 saying they had to use an RFID badge to activate but the charge was still free. There are only Chargemap Pass entries since December 2023, so it doesn't help to identify when it was networked.
The AC chargers don't appear in any roaming app I can find. In 2015 there used to be a different AC charger next to the Terra 53, it looks it was one post with just regular T13 or Schuko connectors on both sides. But then the history isn't very clear. There's a Chargemap comment from September 2018 saying the "2 double 22kW chargers" have been removed. In January 2019 there's a comment saying to bring your own cable. In May 2019 there's a comment saying the Terra charger is out of service but the 22kWh(sic) chargers are still working. I can't find any picture showing different AC chargers, but it sounds like the chargers removed in 2018 are not the same as visible in the 2015 pictures on GoingElectric.