This discussion will outline, two primary methods for connecting a charger system. A charger system, in this context, refers to an array of one or more chargers. The first method involves connecting to an adjacent building's electrical system. An example of this distribution utilizing this type of connection can resemble the diagram below.
The second method entails establishing a new electrical service from the utility provider specifically for the charger system. An example of a charger system distribution design is shown below with a connection to a utility pole.
When opting for the first method and connecting to a building's electrical system, it is crucial to conduct a comprehensive examination of the point of connection. Typically situated at a panel or distribution board within the electrical distribution system, the point of connection should be chosen as close to the service panel as possible to minimize the risk of overloading upstream panels.
Furthermore, when dealing with an existing electrical system, a thorough assessment of the current load on the selected panel and all upstream panels is necessary. This evaluation ensures that the EV charger system does not surpass the capacity of any panel within the electrical system, thereby preventing potential overloads and ensuring the system's safe and efficient operation.
The second method involves establishing a new electrical service dedicated to serving the car charging system. This approach is typically chosen when the EV charger system's electrical load is too substantial for connection to a building's electrical system. It is also preferred when the charging system is situated at a considerable distance from the building but can be easily accessed from a utility easement adjacent to the parking lot containing the car chargers.