South America is abundant in energy resources. Grid interconnections in the continent are designed mainly to realize mutual support for power supply between north and south in the western coast of the continent, transmission of electricity from north to south in the eastern regions, and transmission of power from west to east in the central regions. Situated to the west of the Andes with abundant solar and wind energy resources, Chile and Peru have more potential for energy export due to their smaller populations and lower load demand compared with larger countries to the east, such as Brazil and Argentina. Situated in eastern South America, the Amazon, the Tocantins, and the Parana river basins are abundant in hydroelectric resources, enabling them to transmit power to the load centers on the eastern coasts of Brazil and Argentina. The solar and wind power bases in western South America can supply power to load centers in the east through UHV grids. Grid interconnections between east and west will generate better benefits through the combined operation of wind, solar and hydropower bases. The Brazil Belo Monte UHV DC transmission project with a route length of 2092 km transmits hydropower from the Xingu River in the north to Estreito, a load center in the southeast. It is the first ±800 kV UHV DC transmission project on the continent of America.
The future backbone of South America's grid interconnections is designed to realize interconnection among load centers in countries in the north like Ecuador, Columbia, and Venezuela, among load centers in countries in the east like Brazil and Argentina, among hydropower bases in Brazil, among solar and wind power bases in Peru and Chile, and among various other load centers. See figure for South America's transnational grid interconnections.