Unable to answer "How many cars can be charged here at the same time?" – Stadt Fulda (Charging Station) – https://osm.org/node/9222977732 via StreetComplete 63.0:

Nur für Elektrofahrräder

Attached photo(s):
https://streetcomplete.app/p/341389.jpg
https://streetcomplete.app/p/341390.jpg