National Energy Grid of Columbia
There are 11 companies in charge of electricity transmission in Colombia, the largest being the government-controlled Interconexión Eléctrica S.A. E.S.P. (ISA) which controls 83% of the electricity
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Electricity supply in Colombia relies on the National Interconnected System (SIN) and several isolated local systems in the Non-Interconnected Zones (ZNI). SIN encompasses one third of the territory, giving coverage to 96 percent of the population. Thirty-two large hydroelectric plants and thirty thermal power stations feed electricity into the SIN.
