Technology
Most solar parks use ground mounted (sometimes called free-field or stand-alone) arrays. They can either be fixed tilt or tracking, either single axis or dual axis. Tracking increases the output, but also the installation and maintenance cost.
The DC power output of the solar arrays is converted to AC by inverters, and connection to the grid is through a high voltage three phase step up transformer, usually to 10 kV or above.
Read more about this topic: Photovoltaic Power Stations