[Johnny555]

A quad 120V 20A outlet suitable for charging 4 cars is going to take a lot more than $200 to install in most commercial locations, they'll either need to install an 80A subpanel near the outlet with 4 20A breakers, or home run 4 20A circuits to the main panel.

If the main panel is out of spare breaker slots (or doesn't have enough amperage left on the feeder), it's going to expensive to upgrade the panel.

Most of the cost ends up in labor, so if you're going to go to all of the expense to install a 4x20A quad outlet, you may as well install a 30A 240V level 2 charge station.

Most of that cost is labor -- I looked into installing a charge station in my condo apartment garage -- coring and installing a home run back to the main panel would have cost $3000 - $5000, and I would have had to pay for a power study for the HOA owned panel.

There wouldn't have been much difference in materials cost between installing a 120V 20A circuit for level 1 charging and a 30A 220VAC level2 charge station.