Interest in the northern border area was sparked by the Nicaraguan invasion into the Isla Calero in October 2010.
The electricity is provided by Coopelesca, a local cooperative.
Alfio Piva Mesén and Luis Liberman, the two vice presidents of the country, were there to attend the inauguration Saturday. They also viewed a road being constructed along the south bank of the Río San Juan. The Nicaraguan central government has made the highway controversial and has accused Costa Rica of environmental damage. The south bank is the international border.