Investor Presentaiton

ADDENDA CURRENT REGULATORY AND GRID COORDINATION CHALLENGES MW 3,000 2,500 2,000 1,500 1,000 500 0 Generation in the SING - March 22 to 31, 2018 US$/MWh 100 90 80 70 60 50 40 30 20 10 1 5 9 131721 1 5 9 131721 1 5 9 131721 1 5 9 13 1721 1 5 9 131721 1 5 9 131721 1 5 9 13 1721 1 5 9 13 1721 1 5 9 131721 1 5 9 131721 22 Solar Coal EECL TEN Flows 23 24 25 Wind LNG EECL SING Demand 26 29 27 28 30 31 Other Coal Others LNG Others Diesel Marginal Cost-Crucero 220kV Source: CEN • . Penetration of intermittent renewable power sources and interconnection Lower marginal costs during sun & wind hours; renewable power imports through the TEN line Higher system costs to cope with intermittent output (more frequent CCGT start-ups, greater spinning reserve required to thermal plants) New ancillary services regulation required Need to develop economic 24 x 7 renewable generation solutions Engie Energía Chile Presentation to Investors - 1Q 2018 ENGIE 31

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