Configuring chargers at a charging site is provided. A data processing system can include a processor coupled with memory and configured to identify a configuration. The configuration can indicate a plurality of chargers coupled with a first line of an electrical panel to conduct power at a first phase and a second line of the electrical panel to conduct power at a second phase different than the first phase. The one or more processors can cause, based on the configuration and operational characteristics associated with one or more of the plurality of chargers, a controller to deliver power to a charger of the plurality of chargers via the first line and the second line based on the power capacity of the electrical panel.