Grid-connected Photovoltaic Systems (GPS)

When the electricity grid is available but electricity from a clean source (solar) is desired, solar panels can be connected to the grid. Provided that sufficient panels are placed, the appliances in the house/building will then run on solar electricity. A grid-connected solar electricity system basically consists of one or more solar panels, an inverter, cables, the electric load and a support structure to mount the solar panels.

1. solar panels
2. inverter
3. grid
4. appliances 

An inverter is used to connect the panels to the grid. Some panels (so-called AC modules) come with an inverter for grid connection built in. The solar panels can be mounted on the roof under the optimum tilt angle (see tilt angle and orientation) with a support structure or aluminium frame. Simple systems with AC modules and prefab support structures are increasingly commercially available for do-it-yourself purposes. Although a handy person can do much of the work, all electric connections must be made by a trained professional.