Major works on the Kirchner and Cepernic dams have been suspended since December 2016, pending completion of the study and a public hearing.
While households saw a 0.7% rise in electricity use in May, there were declines in the industrial and commercial segments of 2.5% and 2.4%, respectively, according to new figures.
The potential capacity additions in Saint Vincent and the Grenadines, Dominica, Grenada, Nevis, Saint Kitts and Saint Lucia total 195MW.
The initiative is included in the Cali declaration, the document resulting from the XII Pacific Alliance Summit, which took place in Colombia from June 28-July 1.
The lower chamber of congress approved a motion that calls on President Michelle Bachelet to issue a bill that would give the SEA the power to plan environmental policies, with a focus on protecting and developing the country's resources.