Figure 11

(a) Annual soiling losses expected with different cleanings per year (N) in Iquique (red curve); annual costs of cleaning computed under different N values assuming that the cleaning cost is US$5/kWp (dashed black curve); total annual costs under different N values adding up both the soiling losses and the cleaning costs (blue curve); (b) Annual soiling losses expected with different cleanings per year (N) at the locations considered in this study. The dashed lines stand for the annual costs associated to N cleanings per year considering different cleaning prices.