Bulgaria’s decision to separate Maritsa East Mines and the Maritsa East 2 Thermal Power Plant from Bulgarian Energy Holding (BEH) signals a shift in coal restructuring from a climate-policy discussion into a fiscal, governance and financing risk issue. The reform is a requirement under Bulgaria’s Recovery and Resilience Plan, but repeated delays have placed more than €1bn in EU-linked funding at risk, including allocations tied to territorial just transition programmes.
Energy Minister Iva Petrova has been tasked with designing the restructuring framework and coordinating its approval with parliament. Earlier legislative decisions have complicated the process of reorganising BEH, forcing policymakers to pursue a model that would transfer Maritsa East Mines and Maritsa East 2 into a separate state-owned enterprise. This approach does not represent a full coal exit strategy, but rather a governance separation mechanism intended to isolate legacy coal assets from the broader national energy holding structure.
The core challenge for Bulgaria is timing. The country remains deeply exposed to coal-dependent regions, employment structures and political sensitivities, particularly in the Maritsa East complex. The area is not only a generation hub but also a regional socio-economic system, meaning that any restructuring carries significant labour and political risk. However, delaying reform introduces an equally serious financial risk, as EU funding linked to transition milestones is no longer guaranteed without demonstrable progress.
This tension is highlighted by the contrast with Bulgaria’s rapid development of battery energy storage systems. The country is targeting up to 3 GWh of installed battery capacity by the end of 2026, with projects such as Nova Zagora, Knizhnovik and installations by Sermatec and Sunotec-linked developers playing a central role in supporting renewable integration and grid stability. While the storage sector is expanding quickly, coal restructuring remains slow, politically sensitive and institutionally complex.
This dual-track dynamic is increasingly characteristic of South-east Europe’s energy transition. New energy technologies such as batteries, renewables and hybrid systems can scale rapidly when supported by investment capital, supply chains and market incentives. By contrast, legacy coal systems evolve slowly because they are embedded in employment structures, tariff systems, state ownership frameworks and regional political economies. Bulgaria’s situation illustrates the difficulty of managing both transitions simultaneously.
The key policy challenge is therefore integration. Coal-region restructuring must be credible enough to unlock EU financial support and transition funding, while at the same time renewable and storage capacity must expand quickly enough to replace the system services historically provided by coal generation. Without this balance, the risk is a gap between declining legacy capacity and insufficient flexible replacement.
For investors, Bulgaria’s case demonstrates that energy transition in South-east Europe is not solely a question of building wind, solar and battery infrastructure. It is also a question of restructuring incumbent utilities, managing social transition costs and maintaining system reliability during structural change. The outcome of the Maritsa East reform process will therefore be closely watched, as it will indicate whether EU conditionality can successfully drive governance reform in politically sensitive energy systems while preserving investment confidence in the wider region.
