ENGIE has fully commissioned the Assú Sol photovoltaic complex in Brazil, making it the company’s largest solar project currently in operation worldwide. The complex, made up of 16 solar plants, received final clearance from Brazilian authorities in February 2026. Construction had been completed earlier, in December 2025.
The project represents a total investment of BRL 3.3 billion and is located in the State of Rio Grande do Norte in northeast Brazil.
Project Scale and Infrastructure
Spread across 2,344 hectares, Assú Sol is designed to generate enough electricity each year to power a city of nearly 850,000 people.
Key project highlights include:
- 16 solar plants forming the complex
- Over 1.5 million solar modules installed
- Around 12,000 kilometres of cabling
- 53 kilometres of internal access roads
- More than 4,500 direct jobs created during construction
The project took more than 30 months to finish, but it stayed on schedule and within budget while still following strict safety rules.
Use of Advanced Construction Technologies
ENGIE used several advanced technologies rarely applied at this scale in Brazil. These included:
- Drone-based aerial mapping
- Automated graders integrated with 3D modelling systems
- A dedicated automatic pile-driving machine designed specifically for solar installations used for the first time in Brazil
These innovations helped streamline construction and improve efficiency across the large site.
Expanding Renewable Presence in Brazil
ENGIE now operates 15.7 GW of fully renewable installed capacity in Brazil across hydropower, onshore wind, and solar assets. The company also manages about 3,200 kilometres of transmission lines and 22 substations nationwide.
In December 2025, ENGIE commissioned the Serra do Assuruá wind complex in Bahia, with an installed capacity of 846 MW, making it the company’s largest onshore wind project globally. The company has also energised the first 334-kilometre section of the Asa Branca transmission network, which will extend over 1,000 kilometres across Bahia, Minas Gerais, and Espírito Santo. Alongside the remaining 660 kilometres of Asa Branca, ENGIE is advancing the Graúna transmission project, adding 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.
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