The first blockchain-based international green certificate transaction for household photovoltaic projects in Brazil has been completed

On January 10, 2025, the Macao International Carbon Emission Exchange (MEX) announced that following the completion of the first carbon asset transaction in Portuguese-speaking countries, it has successfully concluded the first international green certificate (I-REC) transaction for household photovoltaic projects in Portuguese-speaking countries.

It is reported that the green power behind this green certificate originates from a household photovoltaic project in Paraná State, Brazil, and the relevant power generation data has achieved trustworthy recording and circulation through blockchain technology.

This international green certificate for household photovoltaic (PV) projects is developed based on the household PV power station projects served by Yingzhen Technology in Paraná State, Brazil. It is registered through REDEX for the International Renewable Energy Certificate (I-REC) and issued by Green Certificate Company, which is recognized by the ITRACK Foundation as the central issuer of I-REC (E).

It is understood that the project applies blockchain and Internet of Things (IoT) technologies from AntChain to achieve integration of small-scale decentralized household PV systems, featuring real-time data traceability, authentic data collection, and real-time transmission.

A. IoT Technology Integration: The project connects decentralized household PV devices through IoT technology to collect real-time operational data from small-scale household PV power generation units. This technology enables effective integration of even small-scale household PV systems, allowing farmers with household PV installations to more conveniently and efficiently generate income from renewable energy equipment.

B. Blockchain Technology Application: The tamper-proof nature of blockchain technology ensures the authenticity, integrity, and traceability of data collection, eliminating risks of manual data tampering or loss. This provides a solid technical foundation for data transparency and security, making every data record publicly verifiable and enhancing the trustworthiness and reliability of the entire system.

C. Innovative Digital Data Transmission: The project uses innovative digital means for real-time data transmission. By connecting the blockchain system with the green certificate issuer’s registration and issuance system, the project enables real-time collection, transmission, accounting, and certification of green power data. This not only significantly reduces the audit costs for certification bodies but also creates a critical prerequisite for transparent management and trading of green certificates. Such an efficient digital process ensures instant data updates and accuracy, providing a solid foundation for the certification and trading of green energy.

Looking ahead, digital real-time data collection, verification, and issuance will be the trend to help uncover the value of green power and green certificates. With the support of digital technologies such as blockchain and the Internet of Things (IoT), decentralized household photovoltaic (PV) projects like this will become easier to scale and integrate, and the issuance cycle is likely to be significantly shortened (or even achieve real-time issuance). Additionally, the application of blockchain technology further ensures the high quality and traceability of green certificate data, providing technical guarantees for promoting the development of distributed energy sources such as household PV.

MEX will continue to collaborate with digital technology institutions like AntChain to provide digital technology and trading market support for Portuguese-speaking countries and even broader Southern countries to enhance climate resilience through green energy markets.