UTE GNA II is the largest natural gas power plant in Brazil. In commercial operation since May 2025, UTE GNA II has an installed capacity of 1.7 GW — enough energy to supply around 8 million households.

Located at the Port of Açu, Rio de Janeiro, it is part of the largest natural gas-fired thermal power complex in Latin America, with 3 GW of installed capacity. The complex consists of two power plants — UTE GNA I and UTE GNA II — connected by a privately operated LNG Terminal.

Advanced Technology and Energy Efficiency

Like UTE GNA I, UTE GNA II operates in a combined cycle configuration, with 3 gas turbines and 1 steam turbine. These are among the most advanced turbines available on the market today, enabling over 60% energy efficiency and achieving the lowest emission levels among operational plants in the country.

Aligned with our commitment to supporting the energy transition, UTE GNA II was designed to operate using up to 50% hydrogen as a substitute for natural gas. Another distinguishing feature is the use of nearly 100% seawater, treated in an on-site desalination plant, minimizing the use of freshwater resources.

The energy generated by UTE GNA II is connected to the SIN - National Interconnected System - through a 500 kV transmission line approximately 52 km long, reaching the Campos II substation.

A-6/2017

Auction

1.672 MW

installed capacity

2025

commercial operation start

25 years

CCEAR

65 MM m3/day

gas consumption

40%

inflexibility level

Explore the other developments in GNA’s thermal power complex:

GNL LNG Terminal TPP GNA I