ANEEL shortens free-market migration timelines and approves Open Energy
New ANEEL rules reduce migration to 90 days for most eligible businesses using the simplified process and establish Open Energy, with consumer-authorized energy-data sharing.
The Brazilian Electricity Regulatory Agency (ANEEL) approved new rules for business customers migrating to Brazil’s free energy market. Under the simplified process, the timeline falls from 180 to 90 days for most AS and A4 units. The decision also establishes Open Energy, a standardized model through which consumers can authorize access to their energy data.
Who can migrate in 90 days?
The rule applies to Group A customers, supplied at medium or high voltage. Under the simplified process, most AS and A4 units will be able to complete the migration within 90 days. Other cases remain subject to the 180-day timeline. Distributors may adopt a shorter period if they apply it equitably.
In Brazil’s free energy market, businesses can choose their electricity supplier and negotiate commercial terms. The local distributor remains responsible for the wires and delivery of electricity. The change concerns the energy supply contract, not the power grid. See the Ministry of Mines and Energy guide.
What is Open Energy?
Open Energy is a standardized way for consumers to allow an authorized company to access information such as consumption, billing and metering data. In simple terms, it is controlled access to an energy account’s history, which may support services and offer comparisons.
The consumer must give prior consent and chooses with whom to share the data and for how long. They can revoke consent and check who accessed the information. The service will be free and subject to Brazil’s General Data Protection Law (LGPD).
Implementation will take place in stages. Within up to 12 months after the rule is published, ANEEL expects standardized access to a consumer’s own data and a CCEE platform for comparing prices and products. Standardized APIs for data exchange between systems have a deadline of up to 24 months.
What could change for the sector?
Shorter timelines may reduce steps and uncertainty for businesses considering migration. Open Energy may also make it easier to compare proposals and develop data-based services, provided consumers authorize that use.
These are potential effects, not outcomes already measured in the market. The availability of tools, consumer participation and the quality of offers will shape the result. The approved rules cover Group A; opening the market to low-voltage customers (Group B) remains part of a separate regulatory process.
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Sources
- ANEEL — market opening and Open Energy, 27 Oct 2026.
- Brazilian Ministry of Mines and Energy — migration and contracting rules.
- MegaWhat — independent coverage.