**Categories:** International, Energy **Tags:** Brazil, electricity contracts, self-generation, renewable energy, electricity grid **Excerpt:** Self-generation contracts already account for more than a fifth of electricity generated in Brazil, but a reform now reserves new projects for large buyers. Rising renewable curtailment adds a cost risk to these long-term agreements. **Slug:** bresil-ppa-autoproduction-regles-ecretement-renouvelables **Image alt:** A solar farm and power lines illustrating direct energy supply contracts in Brazil.
Electricity self-generation contracts play a growing role in Brazil's energy system, but their framework is changing. In 2025, self-generation facilities generated 176 terawatt-hours, or 22.7% of the country's electricity output, up 12.4% year on year. A new law adopted in November 2025 imposes stricter conditions on new projects: each partner must hold at least 30% of the equity, and the project must represent minimum contracted demand of 30 megawatts.
These rules effectively limit the model to companies able to take a substantial equity stake and consume large volumes. Data centres are among potential new customers, alongside heavy industry. However, producers and buyers must also manage another risk: solar and wind curtailment, which reduces volumes actually delivered even as supply contracts run for fifteen to twenty years.
A mechanism that has become important for large businesses
Under a self-generation contract, a consumer can invest directly in a generating facility or partner with a producer to secure part of its needs. The arrangement improves control over long-term prices and availability while supporting new capacity. In Brazil, hydropower remains dominant in the portfolio of companies involved in these structures, with solar, wind and thermal generation gaining ground.
Industrial businesses are attracted by the visibility offered by multi-year contracts. Steel, aluminium and hydrogen production and data centre operations require substantial volumes and relatively continuous supply. A fifteen- to twenty-year contract can align the producer's investment with the buyer's needs, but makes the quality of consumption forecasts particularly important.
Recently adopted rules change access to the mechanism. The minimum equity requirement and 30 MW demand threshold reduce the model's appeal for small businesses. The market may thus gain financial strength, as only large consumers can support the investment required, but becomes less accessible and less diverse. Medium-sized businesses may need to rely on other electricity purchasing mechanisms or collective solutions.
Curtailment weakens contract economics
Brazil's electricity system has experienced a sharp rise in restrictions on renewable generation when supply exceeds grid capacity or demand. According to system operator data, curtailment affected 21.3% of potential wind and solar output between the beginning of the year and 16 September 2026. Producers are then unable to feed all the electricity they could have generated into the grid.
This changes the economics of contracts. If a renewable site is constrained by the grid, the buyer may need to procure electricity elsewhere, sometimes on the short-term market. Contract terms determine whether these costs are borne by the producer, the consumer or shared. New agreements tend to share curtailment risk, giving both parties more direct exposure to the grid's physical limits.
The Brazilian association of self-generation investors estimates that curtailment losses amounted to 6 billion reais in 2025 for solar and wind producers, including approximately 1.5 billion for self-generation businesses. These are industry estimates, but illustrate the scale of commercial risk. A power plant may be technically available without being able to sell all its output.
The response involves more than better-drafted contracts. Strengthening the grid, storage capacity and improved coordination between generation and consumption areas are necessary to reduce losses. Rapid growth in renewable capacity has outpaced some transmission and balancing investments, increasing restrictions during periods of strong generation.
Data centres support a new wave of contracts
Demand associated with data centres opens a new opportunity for self-generation contracts. These facilities need continuous power, and operators seek to secure supply in response to customer requirements and climate commitments. Contracts can combine several technologies and be supported by backup or storage capacity.
Concentrating demand among large customers could attract investment, but also creates dependence risk. If a project relies on one buyer and its needs change, the capacity built may become harder to commercialise. Rigorous load planning, backup solutions and contractual guarantees are therefore essential.
Data centre demand must not obscure electricity access either. Large consumers can negotiate tailored contracts and attract new capacity, while smaller businesses remain exposed to general market conditions. Regulators will need to monitor these arrangements' effects on network costs, tariffs and electricity availability for other users.
Reliability now depends on infrastructure as much as contracts
Brazil has demonstrated that private contracts can mobilise capital and support a substantial share of generation. Their future expansion nevertheless depends on coherence between commercial rules and grid investment. Transmission lines must carry electricity to demand centres, while storage and management systems can narrow the gap between variable generation and continuous consumption.
For businesses, points to examine include the generation profile, volume guarantees, allocation of curtailment costs, duration, exit terms and exposure to market prices. New participation requirements could strengthen financial discipline, but reduce the number of participants able to enter the mechanism.
Self-generation PPAs will probably remain a major tool for large consumers. Their contribution to the transition will be determined by their ability to finance facilities that can actually connect to the grid, share risks fairly and complement collective grid investment. Without this coordination, a long-term contract can promise security that infrastructure cannot provide.