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A grid-connected solar PV system uses solar modules as the power generation source. The power produced is fed into an inverter which changes the DC power output of the solar array to AC power compatible with the regional power grid regulations at the installation site. The system allows for any on-site loads to be powered by a combination of power generated by the PV system and power drawn from the mains power grid. Excess power generated by the PV systemwill be exported to the power grid.

The major components of a grid-connect PV system are depicted in the figure below and include:
1. PV array
2. Inverter
3. Meters

In addition to these major components are the necessary cables, junction boxes, protection devices, switches, lightning protection and signage.