On September 1st, 2007, the Colombian companies Emgesa S.A. E.S.P. and Central Hidroeléctrica de Betania S.A. E.S.P. completed a merger process, leaving the latter as the absorbing company, which changed its name to Emgesa S.A. E.S.P.
Emgesa is the largest electricity generation company in Colombia, and is located near the city of Bogotá. The company is comprised by 17 power plants with 3,499 MW of total installed capacity, among which El Guavio is significant, with 1,250 MW of installed capacity, being the largest hydroelectric power plant in the country.
Out of the 17 existing plants, 15 are hydroelectric and 2 are thermal. Net generation was 14,052 GWh in 2018. Hydro generation reached 13,763 GWh and thermal generation was 289 GWh. Sales through the energy exchange reached 2,827 GWh.