What do “ON-GRID”, “GRID-CONNECTED”,”GRID-TIED” and “OFF-GRID” mean?
On-grid, grid-connected or grid-tied solar power systems are installed on homes that receive power service from the utility electrical grid. They are designed such that the home can be powered either by the solar power system or by the grid, depending on available sunlight. The Eagle Solar Roof is designed as on-grid systems. Off-grid systems are not connected to the utility electrical grid, and are also called “stand-alone” systems. These systems need large batteries to store energy, and require custom design by a solar power professional.
