Transmission project will support lithium production.
A report by the US ratings agency says development will take longer in Latin America.
The small-scale power generation contracts are branded as the first to be granted by the country's lawmakers.
New studies look to define technical conditions of building the infrastructure at the Pacific coast port of Buenaventura.
Brazilian construction group eyes Amazonas region for large-scale hydroelectric plant.
The country has the potential to install almost 20,000MW of distributed generation from solar by 2030, according to the energy ministry.