The fifth step consists in analysing the performance data coming from the last step so that the user is able to quantify the economic gain given by the studied solar cooling system. For this purpose and in the framework of the EU Specific Support Action ROCOCO [5], a analysis method has been developed by the Spanish solar cooling engineering specialist, Aiguasol, in partnership with the other participants of this project to analyse technical results on the economical point of view. Numerous criteria such as investment, operation maintenance and energy prices based on existing experiences and cost reduction trends are used to make a very precise and interesting analysis. Several graphs such as the one presented in Figure 3 should permit to present specific ratios such as economical savings in primary energy in comparison with a reference system (electricity, gas for example). This powerful tool is still under development but could be adapted to the method with the agreement of Aiguasol.