The last two units, for a final total of 20, are expected to start
operations before the end of 2006, increasing the capacity of the
plant from 12,600 MW to 14,000 MW. This increase in capacity will
allow for 18 generation units to remain running all of the time
while two stay down for maintenance (while today, 16 or 17 run while
one or two are down).
With its 18 units currently in operation,
Itaipu generates an average of 90 million megawatt-hours (MWh) per
year. With the increase in capacity and in favorable conditions of
the Paraná River (regular rains throughout the basin area),
generation may reach the mark of 100,000,000 MWh.
Each turbine generates around 700 megawatts; for comparison, all
the water from the Iguassu Falls would have capacity to feed only
two generators.