The results obtained in the evaluation of a 2 kW, grid-connected photovoltaic system in Malaga (Spain) are shown. The data set covers from January until December 1997. The energy losses of the system and the most relevant performances of the installation have been quantified. In this period, the system has suplied 2678 kWh to the grid. This means a daily energy average of 7,4 kWh, with a monthly average value of daily system efficiency between 6,1 and 8,0 %. According with the obtained results, the South of Spain is an optimum region for the development of grid-connected photovoltaic systems.