Significant logistical challenges are emerging as projects contracted over the past year begin construction, with bonus payments promised for wind farms that can produce power before December 2014 — adding extra pressure to the situation.

Santiago Mullin, a technical adviser to the Uruguayan wind-power association, Audee, predicts that convoys of eight or nine turbine components must be transported each working day for two-and-a-half years from July to hit 1.2GW,