Issues about Monitoring the Energy Performance of a PV Plants Constellation

After setting PhotoVoltaic (PV) plant up, it needs to monitor its energy performance in order to verify the correct or incorrect operation. For this aim, PV plants can be equipped with simple dataloggers or SCADA systems. When several PV plants have to be monitored, a unique supervision centre is implemented, even if each PV plant is independent from the others. From the point of view of storing and transferring data, they constitute a constellation of PV plants. This structure, based on the client-server configuration, allows to concentrate the information on a unique supervision centre, but PV plants have to be monitored one at a time. If several analyses have to be run for each PV plant, the total time for monitoring the whole constellation can be very long. The paper deals with these issues.