Areas under power transmission lines have significant potential for solar energy production. A pilot project carried out in São Bernardo do Campo (SP) concluded that it is technically feasible to install photovoltaic panels in safety zones under power lines without compromising the operation of the electrical system.
The tests involved analyses of shading, the influence of electromagnetic fields, and operational compatibility between transmission assets and solar power generation.
According to the study, the results demonstrated low interference on the performance of photovoltaic systems and no significant impact on grid security.
With a total investment of R$ 1,6 million, the initiative was conducted by ISA Energia Brasil within the scope of a R&D (Research, Development and Innovation) project regulated by ANEEL (National Electric Energy Agency).
The project involved installing a prototype solar power plant under a transmission line in the municipality of São Paulo between May and December 2025.
During the execution, factors such as shading behavior caused by towers and cables, photovoltaic module performance, and potential electromagnetic interference were evaluated under real-world conditions.
According to computer simulations, the plant could reach an installed capacity of 1,224 MWp, with an estimated annual generation of 1.746 MWh. This volume would be sufficient to supply hundreds of homes.
Results
According to the study, one of the main conclusions was that the shading caused by transmission structures does not significantly compromise energy generation.
The system used high-efficiency solar panels capable of harnessing even reflected radiation from the surroundings, increasing performance even in conditions of lower direct sunlight.
The technical validation was carried out in three stages, encompassing theoretical studies, computer simulations, and field measurements.
The combination of these elements allowed for the consolidation of technical parameters for future applications of this model in the electricity sector.
According to the company's assessment, the data obtained helps to reduce uncertainties related to the use of safety zones in transmission lines for renewable energy generation.
Potential
ISA Energia Brasil operates approximately 23 kilometers of transmission lines in the country, crossing 18 states and major urban centers.
In the municipality of São Paulo alone, the safety zones associated with these structures total approximately 16,2 million square meters.
The company believes that these areas may represent an opportunity for complementary use of existing infrastructure, expanding the integration between transmission and renewable generation.
In addition to the possibility of energy recovery, the project also reinforces discussions about efficiency in land use and the integration of solutions aimed at decarbonizing the Brazilian electricity sector.
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