Investment commitments in the Southeast European (SEE) energy sector are set to reach between €18 billion and €22 billion in 2025, marking a significant increase from the €11 billion to €13 billion range seen annually prior to 2022. This growth is driven by a combination of factors including heightened security concerns following recent geopolitical events, ambitious renewable energy targets, and regulatory alignment with European Union standards. The evolving landscape indicates that capital is increasingly being allocated across integrated value chains rather than solely into isolated generation assets.
The renewable energy sector continues to attract the largest share of investment, with utility-scale solar and wind projects expected to account for approximately 45% to 50% of total energy investments in SEE. Cumulative capital expenditures (CAPEX) for new renewable projects are projected to surpass €9 billion to €10 billion. Key players in this segment include Greece, Romania, Bulgaria, and Serbia, which benefit from competitive auction frameworks and improved access to grids. CAPEX for utility-scale solar has stabilized between €550,000 and €700,000 per MW, while onshore wind projects are clustered around €1.2 million to €1.4 million per MW.
A notable trend in 2025 is the shift towards hybrid revenue models within renewable investments. This evolution incorporates corporate power purchase agreements (PPAs), indexed floor-price contracts, and state-backed contracts for difference into single financing structures. Such changes have broadened the investor base beyond traditional infrastructure funds to include pension funds and insurance companies seeking stable, inflation-linked returns. This diversification has resulted in lower perceived revenue risks, which contributes to a decreased weighted average cost of capital.
The energy storage sector is experiencing rapid growth as well, with investments estimated at around €1.5 billion to €2 billion in 2025—up from less than €300 million annually before 2023. Dominated by utility-scale lithium-ion installations in Greece, Romania, and Bulgaria, these projects typically range from 50 MW to 200 MW. The CAPEX for grid-scale batteries has declined to approximately €400–500 per kWh, enabling competitive participation in ancillary services and capacity mechanisms without heavy reliance on subsidies.
Grid upgrades are another crucial area of investment, projected at about €5 billion to €6 billion. Investments will focus on high-voltage transmission reinforcements and cross-border interconnectors that enhance regional connectivity with Central Europe and the Eastern Mediterranean. These projects often require substantial funding of between €200 million and €400 million, reflecting both civil works and advanced technology needed for effective market coupling.
The role of public-sector finance remains significant but is no longer dominant; institutions like the European Investment Bank (EIB) and the European Bank for Reconstruction and Development (EBRD) continue to anchor major transactions by providing between 20% and 40% of total project funding. Their involvement lowers political risk premiums, facilitating entry for commercial lenders into previously avoided markets—especially critical in non-EU SEE countries where sovereign risk perceptions remain high despite improving fundamentals.
Sustainability-linked financing instruments have gained traction; green bond issuance by utilities and energy developers exceeded €4 billion, compared with under €1 billion before 2021. These funds support not only renewable projects but also grid modernization initiatives aimed at enhancing energy efficiency.
The industrial sector also presents attractive investment opportunities focused on energy efficiency projects estimated at around €1.2 billion to €1.6 billion. Investments target industries such as metals processing and food production with typical project CAPEX ranging from €5 million to €30 million. These initiatives promise significant energy savings that can yield returns similar to infrastructure investments.
The complexity of financing structures has increased significantly, blending senior debt from commercial banks with mezzanine financing from infrastructure funds. This layered approach allows capital pricing according to risk rather than geographical location—an essential step towards bridging the investment gap between SEE and Western Europe.
A growing trend is the participation of regional utilities and pension funds as equity investors alongside international funds; local institutional investors now represent approximately 15% to 25% of equity stakes in select renewable projects within Greece and Romania. This shift reflects improved financial health among domestic entities recognizing long-term investment potential aligned with their liabilities.
The strategic implications of these trends indicate a clear prioritization of investments that simultaneously advance decarbonization efforts while enhancing supply security and market integration. Projects lacking grid access or revenue visibility face challenges securing financing compared to those that improve flexibility or cross-border resilience.
The robust investment flows anticipated for 2025 signify a re-evaluation of Southeast Europe’s position within the broader European energy landscape. The region is increasingly recognized as an integral part of Europe’s energy framework capable of attracting substantial capital while delivering competitive returns on investment. The challenge remains ensuring that regulatory frameworks, grid readiness, and permitting processes keep pace with this growing investor interest.
