Grid-Connected

In this system, the solar panels are connected to your local utility’s electrical grid to complement your normal power supply from your utility company. 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 your utility to ensure your safety and that of others



Grid-Connected with Battery Back-up

Off-Grid or Stand-Alone



Types of Solar Electric Systems

Grid-Connected

Grid-Connected with Battery Back-up

Off-Grid or Stand-Alone

Types of Solar Panels

Silicon Solar Panels

Thin-Film Solar Panels

Future Solar Panels

Costs & Incentives
Financing
Incentives
Net Metering
Red Flags for Solar Scams
Choosing a System
Purchasing Solar
Solar Leasing
Community Solar
Installation and Maintenance
Choosing an Installer or Contractor
Questions to ask a solar installer
What should my solar bid include?
How Solar Works
Types of Solar Panels
Types of Solar Electric Systems
Resources
Solar Legislation
Reports and Publications
Training Programs
Solar Related Terms
Local Government Resources
Solar Press

Solar Photos

Office of Regulatory Staff
Energy Office
1401 Main Street, Suite 900
Columbia, SC 29201