Over time, home owners may have added hot tubs, electric water heaters, induction stoves, pool heaters, heat pumps, etc. to their homes. This will have increased the total electrical draw on the main electrical panel. A1 can inspect your current panel and provide you with the right professional advice.
For homes with 100-amp panels, however, an electrical panel upgrade may be required. Electrical panels with a 100-amp capacity were standard for many decades and may be adequate if you do not have many other electrical draws. However, you may find an upgrade is needed to properly handle the electrical demands of an EV charger.