There are challenges for multiple occupancy buildings. The absolute ideal would be some clever method to add usage to the domestic bill, maybe via a smart meter connection but that’s so difficult to keep secure although would maximise the efficiency of charging.
Any solution that includes business supply results in increased costs, even if they don’t add a profit margin.
If you have a building with a large, flat roof, then solar could be a solution, including for common service areas. Then charging via batteries could be costed at installation costs plus a little margin?
I'm Autistic, if I say something you find offensive, please let me know, I can guarantee it was unintentional.
I'll try to give my honest opinion but am always open to learning.
Mark