The solar energy will be converted into electricity and fed into the public grid. Efficient, reliable, high power inverters form the heart of any PV system. Central inverter units are used to transform the DC output voltage of the PV modules of large scale PV systems into an AC voltage compliant with the local power grid. To avoid high cable losses the grid connection is often medium voltage, such as 11 000 or 33 000 volts. A comprehensive monitoring system including single string control and weather data enables remote supervision of the power plant.