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The Official Web Site of the State of South Carolina


In this system, the solar panels are connected to the local utility’s electrical grid to complement the normal power supply from the utility company. These systems can be installed on a home’s roof or mounted on the ground.

Grid-connected systems consist of the following:

  • Solar panels mounted on the roof or ground
  • An inverter to convert electricity produced by the system from direct current (DC) energy into alternating current (AC) energy
  • A junction box that connects the solar panel wiring to the breaker panel on the home
  • A utility meter that displays how much power the home produces and uses
  • A disconnect switch that, for safety reasons, prevents the system from sending power to the grid during power outages (this is called islanding)
  • An interconnection agreement with the utility to ensure the consumer’s safety and that of others