Energy Community contracting parties are doing their best to meet the challenging requirements and use the opportunity to couple their electricity markets with the European Union in Q4 2026 or Q1 2027. Apart from other benefits, coupling could represent a strong incentive for investment in renewables. However, the introduction of CBAM could be a step back for electricity markets, investments and energy transition in the region, according to representatives of transmission system operators, regulators, and power exchanges who spoke at Belgrade Energy Forum 2025.

The third Belgrade Energy Forum, BEF 2025, organized by Balkan Green Energy News, welcomed four hundred participants from more than 30 countries from the region, Europe, and beyond.

Participants in the panel called Integration of Western Balkans electricity markets into internal European market through market coupling were:

• Anže Predovnik, ADEX Group, CEO,
• Jasmina Trhulj, Energy Community Secretariat, Head of Electricity Unit,
• Ivan Asanović, TSO Crnogorski Elektroprenosni Sistem (CGES), CEO,
• Marko Bislimoski, Energy, Water Services and Municipal Waste Management Services Regulatory Commission of the Republic of North Macedonia (RKE or ERC), President,
• Zoran Vujasinović, EU Agency for the Cooperation of Energy Regulators (ACER), Policy Officer.

They discussed very hot topics including market coupling, the Carbon Border Adjustment Mechanism (CBAM), and blackouts.

Market coupling: The first go-live window scheduled for Q4 2026 or Q1 2027

In his opening remarks, panel moderator Dejan Stojčevski, CTO of the SEEPEX power exchange, emphasized the importance of integrating the electricity markets of the Energy Community contracting parties (EnC CPs) with the EU internal electricity market as a key element in the energy transition process.

“Market coupling, which is a prerequisite for a successful energy transition, brings about greater transparency, increased competition, the establishment of a unified regional reference price, and stronger incentives for investment in renewable energy sources,” he stressed.

However, in his words, the integration is not without challenges. Countries in the region must address several issues, including the transposition of relevant regulations, the designation of nominated electricity market operators (NEMOs), and the operational connection process through the implementation of local projects, Stojčevski underlined.

Trhulj: The transposition of EIP enables accelerated electricity market integration into the single EU electricity market

The most important regulation is the Energy Integration Package (EIP). Jasmina Trhulj, Head of Electricity Unit of the Energy Community Secretariat, recalled that the transposition of EIP by the contracting parties enables their accelerated electricity market integration into the single EU electricity market before accession into the EU takes place.

To achieve that, EnC CPs have to adopt and implement the laws in a compliant manner, including extending ACER’s jurisdiction to the cross-border issues between EU member states and EnC CPs, she noted.

With regard to regional methodologies, ACER is competent to the extent that neighboring EU countries are involved, which is most often the case.

The preparation of the Market Coupling Operator Integration Plan is underway

Another important piece of the puzzle is the Market Coupling Operator Integration Plan (MCO IP), which will set guidelines and timelines for the implementation of the day-ahead and intraday market coupling of EnC CPs. Trhulj confirmed that the preparation is currently underway.

According to the draft MCO IP, the first go-live window is scheduled for Q4 2026 or potentially by Q1 2027, provided that the following prerequisites are met, she revealed.

The prerequisites are the transposition of the EIHP completed and its compliance verified; NEMO designated in a compliant manner; operational readiness of transmission system operators (TSOs) and NEMOs confirmed; and full contractual adherence completed.

“Provided that the legislation is transposed and its compliance verified and MCO IP approved by ACER, a NEMO may submit requests for accession to market coupling. This is followed by an accession process lasting up to 18 months,” Trhulj explained.

Serbia, Montenegro “locked and ready” for the first go-live window

ADEX Group CEO Anže Predovnik shared Slovenia’s experience in various market coupling processes within the internal European electricity market, including different products such as day-ahead, intraday continuous, and intraday auction market coupling.

He particularly emphasized the importance of market coupling and its impact on liquidity, transparency, competition, and increased investments in renewable energy sources.

Predovnik presented HUPX’s integration into the ADEX Group, which was completed in late 2024, and highlighted the benefits ADEX brings to the market and its participants through the unification of the power exchanges of Slovenia, Serbia, and Hungary.

Enhanced transparency, the use of a unified trading and clearing technology, a single market operation, a harmonized market access process across the ADEX markets, alignment of rules, and improved client services are just some of the advantages offered by the formation of ADEX Group, he pointed out.

One immediate benefit already implemented is that market participants active in one ADEX market do not pay entry fees when accessing another market within the group.

Predovnik: Market participants active in one ADEX market don’t pay entry fees when accessing another market within the group

“Additionally, all resources within the group are contributing to the implementation of the local project for coupling the Serbian and Hungarian day-ahead markets, with the project expected to be completed at the first available slot, anticipated for Q4 2026 or Q1 2027,” Predovnik noted.

CEO of Montenegro’s TSO Crnogorski Elektroprenosni Sistem (CGES) Ivan Asanović also spoke about the market coupling project timeframe.

After compliance of the transposition of EIP is verified and provided that the necessary adaptations of the Day-ahead Operations Agreement (DAOA) and the Intraday Operations Agreement (IDOA) regarding the extension to the price zones of EnC CPs are adopted at the Market Coupling Steering Committee (MCSC) level, CGES and power exchange BELEN could sign these contracts, becoming non-operating parties in the MCSC, he revealed.

According to Asanović, obtaining the status in MCSC is a precondition for the submission of a request for change, and it is extremely important to carry it out in a timely manner, to complete the process, which lasts 18 months, until Q4 2026 or Q1 2027.

Of note, a week ago, North Macedonia’s Minister of Energy, Mining and Mineral Resources Sanja Božinovska said it is realistic to aim for coupling in the fourth quarter of 2026 or the first quarter of 2027.

CBAM and blackouts are looming

Apart from market coupling, the stakeholders in the region are also concerned about the developments regarding the Carbon Border Adjustment Mechanism (CBAM) as well as about blackouts.

Dejan Stojčevski (SEEPEX) sees the potential effect of CBAM on the electricity sector, starting on January 1, 2026, as a major issue.

The mechanism could pose a serious threat to the overall energy transition in the region, he added.

In addition, it is crucial to discuss system security and the root causes of the blackouts that recently occurred across Europe, Stojčevski pointed out.

“As there was no announcement that the application of CBAM will be postponed, we are operating under the assumption that it will apply to electricity as of January 1, 2026, given that the contracting parties will not be ready for market coupling by that date,” Jasmina Trhulj (Energy Community Secretariat) underlined.

Trhulj: There is a risk that certain stakeholders may shift their trading activities and renewable investments away from the region

In her words, it creates a number of risks to the functioning of the regional electricity market and the energy transition process that the secretariat has been raising on behalf of the contracting parties, electricity traders, power utilities, renewable energy developers, and other stakeholders.

She warned of a risk that certain stakeholders shift their trading activities and investments in renewables away from the region, thereby potentially undermining integration and decarbonization efforts.

In addition, market participants are raising the issue of the considerable uncertainty regarding the exact technical implementation of CBAM for electricity – inherently unique within a group of goods, Trhulj recalled.

It is crucial for the countries in the region to speak openly with Brussels, said Marko Bislimoski, president of the Energy, Water Services and Municipal Waste Management Services Regulatory Commission of the Republic of North Macedonia. In addition, they need to come up with an action plan, together with the Energy Community Secretariat, defining the phases for the introduction of carbon pricing, in his view.

Bislimoski: We need to define the items for which we need financial assistance from the EU

“We need a serious approach and to say what we can do ourselves, and then immediately make it happen. At the same time, we need to define the items for which we will need financial assistance from the EU,” Bislimoski asserted.

The panelists agreed the region needs to present a single coordinated position on CBAM at an upcoming meeting on July 1 in Brussels.

Bislimoski recalled that North Macedonia recently adopted the new Law on Energy and added that bylaws would follow. The end goal is to provide security and stability in the transmission and distribution of electricity like in the EU, but also to lower the prices of electricity for consumers, he added.

Asanović: It is necessary to take urgent measures to improve coordination in the region

Regarding the issue of blackouts, Ivan Asanović (CGES) emphasized the importance of coordinating transmission capacities and maintenance plans for transmission lines across the wider Balkan region.

He recalled the challenging operational conditions experienced last winter, when exchanges planned along the Greece-Bulgaria-Romania-Hungary corridor were largely physically realized via the southwestern Balkans, leading to significant network stress. Such situations must be avoided through more comprehensive coordination, he warned.

It is necessary, in his words, to take urgent measures to improve coordination in the region to alleviate the current problems until the establishment of the mechanisms and structures prescribed in the CACM and SOGL regulations.

“These rules will fully harmonize the operation of the system in the region with the rest of Europe and significantly improve the security of functioning and create the necessary preconditions for connecting the markets of the WB6 countries with the single European market,” Asanović stressed.

Vujasinović (ACER): Full operational readiness of CCRs is not a prerequisite for market coupling

TSOs made a breakthrough in December. They agreed on a Joint Declaration on Regional Coordination. The declaration, facilitated by ENTSO-E, outlined a new comprehensive cooperation framework for the Western Balkans TSOs within South-East Europe.

Zoran Vujasinović, Policy Officer at the EU Agency for the Cooperation of Energy Regulators (ACER), mentioned that in January the body submitted a request to the TSOs to propose the configuration of capacity calculation regions (CCRs), incorporating the bidding zone borders of EnC CPs within the framework of the EU CCR methodology.

The TSOs’ proposal is expected by the end of July, after which ACER will issue a decision within six months, he said.

The current TSO proposal envisions:

• the inclusion of the southeastern bidding zone borders in the Balkans into the South East Europe (SEE) region, which already includes the borders between Romania, Bulgaria, and Greece.
• the formation of a separate region in the northwestern part (covering the mutual borders of bidding zones of Serbia, Bosnia and Herzegovina, and Montenegro, as well as their bidding zone borders with the EU), with a perspective of integration into the Central Europe region.
• the Italy-Montenegro region and the Eastern Europe region (including Ukraine, Moldova, Poland, Slovakia, Hungary, and Romania) to remain unchanged, as defined by the CACM Regulation of the Energy Community.

According to Vujasaninović, ACER’s position is that the entire region should, over time, transition to flow-based capacity calculation and allocation methodologies. However, the initial step will be participation in market coupling based on Net Transfer Capacity (NTC) values.

“It is important to note that full operational readiness of CCRs is not a prerequisite for market coupling. The coupling can proceed based on existing NTC calculation procedures, provided that regional operational security is not compromised at any time and that maximum coordination in capacity calculation is ensured,” Vujasinović stressed.