I'm trying not to sound sarcastic, but doesn't an electric golf cart fill this need? These look like a fancy golf cart with a solar panel on the top. Is there a street legality issue with golf carts being on public urban streets?
Edited: spelling
https://melex.com.pl/en/products/passenger-street-legal
They have dealerships in most of the EU:
https://melex.com.pl/en/distribution
But they are somewhat low-tech with their deep-cycle lead-acid batteries.