The other issue is having capacity in your panel. Most level 2 chargers are at least 50A and the average house has a 100A to 200A panel. Depending on your appliances, you may or may not have enough space left in your panel without doing at minimum a panel upgrade if not a service upgrade. Just adding an L2 charger is like $2000 or more depending on labor. Switching from 100A to 200A or 200A to a second 200A panel is about $5000 or more in parts and labor (this is on top of the parts and labor for the charger). If you also have to get the utility company to upgrade your service that’s another $5000 or more depending if you need to buy a new transformer for your pole.

This stuff can add up fast if you don’t already have capacity.