ENGIE Commissions Assú Sol, Its Largest Operational Solar Project Globally

ENGIE has fully commissioned the Assú Sol photovoltaic complex in Brazil, marking the company’s largest solar project currently in operation worldwide. The complex, which consists of 16 solar plants, received final approval from Brazilian authorities in February 2026 after construction concluded in December 2025. The project represents a total investment of BRL 3.3 billion.

Located on a 2,344-hectare site in the State of Rio Grande do Norte in northeast Brazil, the facility is designed to generate enough electricity annually to supply a city of approximately 850,000 people. The project includes more than 1.5 million solar modules, around 12,000 kilometres of cabling, and 53 kilometres of internal access roads.

Large-Scale Solar with Advanced Technologies

The development of Assú Sol was completed over a 30-month period, meeting schedule and budget targets while adhering to strict safety standards. Construction activities created more than 4,500 direct jobs during the build phase.

ENGIE deployed several advanced construction technologies rarely used at this scale. These included drone-based aerial mapping, automated graders integrated with 3D modelling systems, and — for the first time in Brazil — a dedicated automatic pile-driving machine designed specifically for solar installations. 

Strengthening ENGIE’s Renewable Portfolio in Brazil

ENGIE currently operates a fully renewable installed capacity of 15.7 GW in Brazil across hydropower, onshore wind, and solar generation. In addition, the company manages approximately 3,200 kilometres of transmission lines and 22 substations across the country.

The commissioning of Assú Sol follows other recent infrastructure milestones. In December 2025, ENGIE brought the Serra do Assuruá wind complex in Bahia into full operation. With an installed capacity of 846 MW, it represents the company’s largest onshore wind project globally.

The company has also energised the first 334-kilometre segment of the Asa Branca transmission network in Bahia. The network is expected to extend beyond 1,000 kilometres across Bahia, Minas Gerais, and Espírito Santo. Alongside completing the remaining 660 kilometres of this network, ENGIE is progressing the Graúna transmission project, which will add 780 kilometres of lines between Paraná and Santa Catarina.

“Assú Sol demonstrates our ability to deliver large scale renewable projects with efficiency and industrial excellence. Commissioning our largest solar complex worldwide – on time, on budget, and in close collaboration with local communities – reflects the knowhow of our teams and the strength of our renewable strategy in Brazil and internationally,” said Paulo Almirante, ENGIE Senior Executive Vice President in charge of Renewable and Flexible Power.