Between charging at home and charging at work, it shouldn't be necessary to occupy the charger every single time you pull in. Maybe once or twice a week, depending on your commute. A long range Model 3 has as much range as your average gasoline vehicle... how often do most people fill that up?
Seems to me if 4000 employees go electric and you can slow charge anywhere from 5-30 miles' worth of power per hour at a worst case scenario and up to 44 at the best, then it stands to reason not everyone has to plug in every single day. In fact, I'd argue most folks would only need to charge up once a week, and for those with very short commutes, once every 2-3 weeks.
I think 250-500 chargers for 4000 vehicles would likely be sufficient to keep everyone charged up and moving around.
The choices were to either arrive very, very early (<8am) or you missed it. Then had to wait until around 4+pm when the early risers started to leave and move the car to a charging spot.
I mostly left after 7pm so it was ok but on days when I had to go at 5pm it was a big problem, didn't have time to get enough charge to get back home.
Also, there's not enough power available to feed all the chargers simultaneously. So when all chargers are used and charging, the power delivery dropped to ~1.5kW. As cars started to get full and stopped drawing power only then power delivery would rise later in the day. So there's no way to install a thousand+ more chargers, there's not enough power delivery available.
I can run my gas tank down below 1/4 because the Bay Area is littered with 24 hour gas stations; I never have to wait a day to get gas. I’m considering a PHEV, but I can’t buy a BEV until a large majority of apartments (or maybe employers, after WFH ends) have that kind of reliable charging whenever I might need it.
