Renewable Energy Certificates

2 August 2023

In recent years, many market-based mechanisms have emerged in the electricity market to incentivize the use of renewable energy and the reduction of carbon emissions. As one of these mechanisms, renewable energy certificates (“RECs”) are used by renewable energy companies and consumers as a tool to prove that electricity is generated from renewable energy sources. In this article, we review the use of RECs in the world and in Türkiye.

Renewable Energy Certificates (RECs)

RECs are electronically issued and tradable certificates proving that 1 MWh of electricity is generated from renewable energy sources. Each REC indicates the source, location and time of electricity generation. The sale of RECs can be conducted together with or independently of the electricity supplied. By purchasing these certificates, consumers prove that their electricity consumption is based on renewable energy sources in accordance with their environmental sensitivities and sustainability goals. In line with the renewable energy-related targets of the countries, REC standards can be implemented on a voluntary or a mandatory basis.

REC Practices in the World

Voluntary RECs are practices where the implementation of a REC is not mandatory as per the legislation. Guarantees of Origin (“GO”) in the European Union, Renewable Energy Certificates (“REC”) in the USA and Canada, and international renewable energy certificates (“I-REC”) that are developed in accordance with the standards set by the International Renewable Energy Certificate Standard Foundation are examples of voluntary REC practices. In addition, countries launch voluntary national REC systems in accordance with the national standards they have developed. Similar to international RECs, national RECs prove that electricity is generated from renewable energy sources, but may include some design differences.

Nowadays, most REC implementations are voluntary. However, countries such as the United States and the United Kingdom also have mandatory REC practices. Under mandatory REC practices, a national authority usually requires market participants to sell or purchase a certain volume or percentage of renewable energy and to prove this activity through the trading and/or redemption of RECs.

RECs Traded in the Turkish Electricity Market

In Türkiye, RECs standards are implemented on a voluntary basis. In this context, certificates issued within the scope of the national Renewable Energy Guarantee of Origin System (“YEK-G”) and the international I-REC system constitute the types of RECs traded in the Turkish electricity market.

YEK-G

YEK-G system has been introduced to Turkish electricity market in 2021. The related procedures and principles are set out in the Regulation on the Renewable Energy Guarantees of Origin in the Electricity Market (“Regulation”) and the authorized institution to issue certificates is the Energy Markets Operator Company of Türkiye (“EPİAŞ”). EPİAŞ operates the Organized YEK-G Market where YEK-G certificates are bought and sold among market participants, and performs the registration, issuance and redemption of YEK-G certificates. Turkish Electricity Transmission Company and the relevant distribution license holders are responsible for transmitting the relevant data to EPİAŞ as meter measurement institutions. This entire process and market operation is subject to the supervision of the Energy Market Regulatory Authority.

The conditions for participation in the YEK-G system can be summarized as follows:

  • Legal entities holding renewable energy generation and supply licenses can apply to EPİAŞ to become “system users”.
  • Multi-resource electricity generation license holders can participate in the organized YEK-G market only if all of their energy resources are renewable. In addition, license holders with active registrations in I-REC or other REC markets cannot participate in the YEK-G Market for the same generation facility.
  • License-exempt electricity producers are not allowed to become users of the YEK-G system.
  • Those who wish to apply for participation in the market are required to sign the YEK-G participation agreement and YEK-G system participation undertaking and fulfill other financial obligations such as collaterals and participation fees specified in the YEK-G System and in the Organized YEK-G Market Operating Procedures and Principles.

Following the registration, EPİAŞ creates a user account for the relevant producer in the YEK-G system registration database, which is associated with the relevant renewable generation facility. Upon the application of the producer registered in the system, EPİAŞ creates 1 YEK-G certificate for each 1 MWh of renewable energy production as certified by meter measurement institutions and transfers the issued YEK-G certificates to the relevant producer’s account.

System users that hold generation or supply license can buy and sell the issued YEK-G certificates. The tradable YEK-G certificates can be transferred between the accounts of system users together with or independently from the electrical energy. In the organized YEK-G market, the party wishing to purchase certificates can choose YEK-G certificates according to the resource type and, consequently, prices are determined on a resource basis. Contracts entailing an obligation to receive or deliver YEK-G certificates equal to the matching amount over the matched price are processed by EPİAŞ in accordance with the continuous trading method. Bids for each contract are evaluated separately and the best priced one among the bids submitted for the same contract are matched first.

System users submit a “redemption” notification to EPİAŞ to verify the renewable energy supply subject to YEK-G certificates, and the relevant YEK-G certificates are terminated by EPİAŞ so that they cannot be transferred again. Redemption certificates are also shared with the final consumer using green energy, and informing consumers about the renewable energy resource they use is called “disclosure” under the Regulation. Thus, consumers can claim, prove and guarantee that they used renewable energy during the relevant consumption period through the YEK-G certificate. Consumers have the opportunity to verify their YEK-G certificates with the redemption number from EPİAŞ YEK-G Certificate Verification Portal. YEK-G certificates are valid for 12 months from the end of the production period and if they are not redeemed by the system user within this period, they will be withdrawn by EPİAŞ and cannot be subject to any other transaction.

I-REC

I-REC, on the other hand, is an international certification system that has an implementation in Türkiye and proves that electricity is generated from renewable energy resources. Subject to a global system, I-REC certificates are issued by an authorized body in each country and these authorized bodies are audited by the International Renewable Energy Certificate Standard Foundation. I-RECs entered the Turkish energy market in 2015 and are issued by Foton Yazılım Teknolojileri ve Enerji Danışmanlık Hizmetleri A.Ş. (“Foton A.Ş.”), the authorized institution. Similar to other RECs, each I-REC corresponds to 1 MWh of electricity generated from renewable energy sources.

When issuing I-REC certificates, the related power plant is registered first. It is possible for all licensed or license-exempt renewable energy power plants to register in the I-REC system. The producers registered in the system request to create credit by submitting the documents evidencing their production. I-REC certificates show the credits used, and in the process of creating I-REC certificates, the documents evidencing the electricity production and the final electricity production data are reviewed.

I-REC certificates can be bought and sold similar to YEK-G certificates and are traded through Foton A.Ş. Producers, suppliers and consumers who wish to engage in certificate trading activities need to create a “Foton Platform Account”. The issued certificates are transferred to the producer’s account and consumers can view and purchase these certificates. Consumers can use the certificates they have acquired in their greenhouse gas emissions reporting.

REC Statistics and Targets

Global Landscape

Since the 90s, meeting electricity demand from reliable and renewable sources has become a goal and an emerging trend, especially in Europe and later worldwide. RECs have become an increasingly important mechanism both to promote renewable power plant investments and to respond to consumers’ environmental sensitivity or increase brand reputation. For example, the International Renewable Energy Certificate Standard Foundation had 104 members at the end of 2022 and the Foundation aims to increase this number further by 2023.

The change in the price of tradable RECs shows that buyers and sellers increasingly value the qualities of renewable energy. For example, the prices of GOs in the second half of 2022 climbed from around €2/MWh to almost €10/MWh, stabilizing between €6 and €9 depending on the product characteristics.

In countries where renewable electricity consumption is not sufficiently incentivized, consumers’ demand for RECs is low. In addition, the fact that countries do not regulate their own legislation in accordance with international REC standards causes REC trade to remain limited to the domestic markets of the countries. Another obstacle to the development of the RECs is the lack of internationally recognized certification and auditor programs in the countries.

Situation in Türkiye

In Türkiye, the use of RECs is becoming widespread in parallel with global developments. In the evaluations made as of the end of 2022, Türkiye has been ranked as the 3rd country creating the highest number of I-RECs for the year of 2021.11 As of today, certificates corresponding to more than 23,000,000 MWh of electricity have been issued in and there are more than 70 companies registered on the I-REC platform in Türkiye.12 Furthermore, to date, YEK-G certificates have been issued for a total of 25,738,637 MWh13 of electricity from wind, hydrogen, geothermal and biomass power plants. On the other hand, in Türkiye, GO standards are not used as they are only applied by EU member states. However, in the YEK-G regulation, the system is designed to adapt to the GO system and integration with the GO system is expected in the coming years.

Currently, the system in Türkiye is criticized for consumers’ not having direct access to organized YEK-G market and having to purchase RECs through supply companies. It is also noted that there is not enough incentive or obligation to purchase RECs in Türkiye and that the demand for certificates is quite low, and the companies only purchase RECs to enhance their reputation and to meet their self-imposed renewable energy consumption targets.

 

Conclusion

RECs are market-based tools evidencing electricity is produced from renewable energy sources. The use of these certificates, which play an important role in reaching the low carbon emission targets of countries, is rapidly increasing worldwide within national and international systems, thus a consistent system for electricity generation from renewable energy sources for both the market and consumers is created. In parallel with these trends, Türkiye is also expected to develop practices that will facilitate and expand REC trade in the coming period.

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