What do the terms “on-grid,” “grid-connected,” “grid-tied,” and “off-grid” mean?
“On-grid,” “grid-connected” and “grid-tied” refer to being connected to the utility electrical grid. Most solar electric systems are designed as on-grid systems, meaning that they interconnect with your existing utility service. Off-grid refers to systems not connected to the utility electrical grid. Utility rebates require that the client have a grid-connected system.
