This methodology allows to take into account the correlation between solar output and electricity demand. The analysis is based on the load factors for wind for the period from 15/01/2011 to 31/01/2012. The data used in the model refer to a location in the South of France and have a 20 minutes resolution. More information can be found at the following address: http://re.jrc.ec.europa.eu/pvgis/apps3/pvest.php. Figure 4.4C shows a magnified section of the first 200 hours (400 periods of Vi hour length) of the load duration curve, corresponding to the peak demand period: the black line shows the annual duration load curve, while the red line represents the residual load curve, obtained by averaging the 650 independently calculated samples generated by the Monte Carlo process. Finally, the blue line shows the highest values of the residual curve (i.e. the case with the lowest renewable production) observed over the 650 samples.