Brazil has finalized one of the largest corporate solar energy contracts to date. The agreement provides for the supply of an average of 126 MW of renewable electricity under a self-generation model and will deliver more than 18 TWh over the contract's term.
The contract was signed between Casa dos Ventos and the sanitation company Sabesp , under a self-production model that will guarantee the supply of clean energy in the long term.
The energy will come from the Rio Brilhante solar complex , located in the state of Mato Grosso do Sul, which will have an installed capacity of 491 MW and will be used exclusively to supply the client. The transaction was structured through a consortium lease agreement, a model that continues to gain traction among large energy consumers in Brazil.
The contract also represents the entry of the self-production model into the sanitation sector, one of the segments with the highest electricity consumption in the country and with a growing interest in reducing energy costs and advancing its decarbonization goals.
According to the companies involved, the initiative combines long-term renewable supply, cost predictability and regulatory benefits associated with the self-production regime, in addition to supporting the consumer's emissions reduction strategy.
A project designed for a large electricity consumer
The contracted volume corresponds to the size of the client's energy consumption, which is currently the eighth largest electricity consumer in Brazil and provides services in 376 municipalities in the state of São Paulo.
The company is also developing a broad infrastructure expansion plan with around 1,100 projects underway and nearly 40,000 workers involved, which increases the need for a stable and competitive electricity supply in the coming years.
The solar project is also integrated into its climate strategy announced in 2025, which aims to reduce total emissions by 15% in the next decade , with a special focus on electricity consumption (Scope 2), where it seeks to achieve a 43% reduction.
For the project developer, the operation marks a milestone both for its scale and for the diversification of its portfolio, as it is a 100% solar undertaking specifically designed to meet the energy needs of a single industrial client.
Beyond the electricity supply, the agreement reflects a trend that is gaining prominence in the Brazilian market: large consumers are increasingly turning to self-production contracts to ensure competitive long-term prices, reduce exposure to market volatility, and accelerate compliance with their sustainability commitments.