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New law in MS demands more transparency from energy distributors, strengthens solar energy, and boosts distributed generation.
Starting June 2, 2026, consumers with photovoltaic systems in MS will have additional protection. Law No. 6,595 came into effect requiring energy distributors to clearly and thoroughly inform all data related to solar energy, including energy injected into the grid, recorded consumption, and accumulated credits.
According to information from the Legislative Assembly of MS on June 2, the measure was sanctioned by Governor Eduardo Riedel after the approval of Bill 186/2026, presented by Deputy Paulo Duarte in co-authorship with Deputy Gerson Claro. The objective is to expand transparency for those participating in distributed generation, in addition to strengthening consumer rights and facilitating the monitoring of energy production.
New law in MS mandates total transparency on solar energy
The new law establishes that concessionaires and permit holders of electric energy distribution must present detailed information to consumers and solar energy generators.
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In practice, users will have clearer access to data that often appeared in a technical or difficult-to-interpret manner on bills.
The mandatory information includes:
- Amount of energy injected into the grid;
- Active energy consumed;
- Balance of accumulated credits;
- Available surplus energy;
- Other information required by ANEEL.
The expectation is that the change will reduce doubts and allow for more precise monitoring of photovoltaic systems installed in homes, rural properties, and businesses.
What changes for those participating in distributed generation
For those who have already invested in distributed generation, the legislation brings more security and control over data related to energy production.
With the new requirements, consumers will be able to more easily verify how much they produced, how much they consumed, and what the credit balance recorded by the energy distributors was.
This transparency is especially important because many owners of photovoltaic systems use this information to assess the financial return on the investment made.
Furthermore, the measure helps to avoid interpretation discrepancies regarding energy credits and makes the relationship between consumer and utility company more balanced.
Energy distributors may receive million-dollar fines
One of the most relevant points of the legislation is the provision of penalties for those who fail to comply with the new rules.
The new law stipulates that energy distributors will be subject to the sanctions provided for in articles 56 and 57 of the Consumer Protection Code, established by Federal Law No. 8.078, of September 11, 1990.
The fines may range between:
- 200 UFERMS;
- 3 million UFERMS.
Considering the value of the State Fiscal Reference Unit of Mato Grosso do Sul set at R$ 53.70 in May 2026, the penalties can range from approximately R$ 10.7 thousand to R$ 161.1 million.
The funds collected will be allocated to public funds responsible for applying the sanction. When there is no specific municipal fund, the amounts will be reverted to the State Consumer Defense Fund (FEDDC).
Solar energy grows in MS and demands clearer rules
The advancement of solar energy in MS has been accompanied by a growing demand for more transparent information.
In recent years, thousands of consumers have started installing photovoltaic systems as a way to reduce electricity costs and increase energy independence. This growth has increased the importance of distributed generation in the state.
With more people producing their own energy, the need to understand how energy credits, consumption compensation, and records made by utility companies work has also increased.
It was precisely this reality that motivated the creation of the legislation approved by the state Legislative Assembly.
Why many consumers had difficulty understanding the bills
According to the authors of the proposal, one of the main problems faced by consumers was related to the interpretation of the information present in energy bills.
Even after investing in solar energy, many users reported difficulties in identifying:
- The energy effectively generated;
- The volume injected into the grid;
- The accumulated credits;
- The amounts compensated on the bill;
- The balance available for future use.
With the entry into force of the new law, energy distributors are now obliged to present this information more clearly, making it easier for consumers to understand the data.
How the new legislation strengthens consumer rights
In addition to increasing transparency, the new regulation reinforces consumer protection mechanisms.
Those who participate in distributed generation make investments that often involve significant amounts in the installation of photovoltaic panels and complementary equipment. Therefore, having access to reliable data on system performance is essential.
By requiring more detailed information, the legislation reduces the information asymmetry between consumers and energy distributors, creating a more transparent environment for all involved.
The measure also expands the oversight capacity of the bodies responsible for consumer protection.
New law may accelerate new investments in distributed generation
Transparency is often one of the most important factors for the development of any market.
When the consumer clearly understands how credit compensation works and can track the results obtained by the photovoltaic system, confidence tends to increase.
Industry experts frequently point out that clear rules favor the expansion of distributed generation, as they reduce uncertainties and make investments more predictable.
In this context, the new law may contribute to further boost the solar energy market in MS, especially among consumers who are still considering the possibility of installing their own systems.
A new scenario of transparency for solar energy in MS
The enactment of Law No. 6,595 represents an important step for the solar energy market in Mato Grosso do Sul. By requiring energy distributors to provide detailed data on production, consumption, and energy credits, the regulation enhances transparency and strengthens consumer rights.
With fines ranging from R$ 10.7 thousand to R$ 161.1 million, the legislation creates effective monitoring mechanisms and encourages compliance with the rules. In a state where distributed generation continues to advance, the measure tends to increase user confidence, improve access to information, and stimulate new investments in the photovoltaic sector.
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