Installing EV charging for one unit in a 6-unit condo building

Factual Questions
1

First of all, yes, we’re going to talk with an electrician. But here’s the story: We live in a 6-unit condo building. Below the building, each unit has one parking space. The electrical panel for the building is in a utility room that’s near the parking spaces. Some of the units are rented out, some are owner-occupied.

New renters in one of the units in our building have an EV. The owner is willing to install power to their parking space and the renters would pay for the charging unit. The owner got a quote from an electrician to provide and install new 50-amp sub-panel, provide and install 50-amp line for sub-panel, provide and install 50-amp GFCI breaker for sub-panel, run a 50-amp line from the electrical room to the parking space, and install a charger provided by the renters.

Will this have any negative effect on any other units, either now or in the future? Apparently the total power coming into the building is not changing? Does this reduce the power available to the other units? If, in the future, other units want to install EV charging, would the configuration installed for the current renter forestall any other possible configurations for the other units?

What ideally should be done? A quick fix for the one unit, or something that can be scaled in the future if other units also want EV charging? (Keeping in mind that the other units don’t want to pay for something they’re not going to use.)

2

You need to do a load calculation. The power company will size the transformer feeding your meter room appropriately. If the load for every unit goes by by 30A, the transformer needs to handle an extra 180A,

3

When we were in our condo our EVSE was somehow connected to our own breaker box. I have no idea the specifics but it was new construction.

Meanwhile future proofing for additional residents with EVs as time goes on - maybe the idea is a sub box that can handle several EVs with “load-managed EV charging infrastructure”?

Increased potential resale value of all units to know that the spaces are EV capable.