Visited on May 4 without charging.
The parking has ticket gates. 15min free and free on Sundays. 0.90CHF/h otherwise.
Older pictures on Chargemap used to show an hybrid TBW/Ost-mobil branding. Now it's just the green TBW. Those Chargemap pictures also show that there used to be no gates. The charging spots had numbers 1 and 2, so there was probably a parking meter.